DE2361653A1 - PROCESS FOR MANUFACTURING LUBRICATING OILS WITH HIGH VISCOSITY INDEX - Google Patents

Description

H 860.C (j / WS / gs) December 11, 1973

K 5159 GEW

SIIELL INTERNATIONAL RESEARCH MAATSCHAPPIJ B.V. '

The Hague / Netherlands

"Process for the production of lubricating oils with a high viscosity index ¹¹ -. ■ '. ■■' ■ -. ■ - - ·

Priority: IjJ. December 1972 - Great Britain - No. 57 ^ 72/72 Jul. 26, 1973 - Great Britain - No. 35 646/73

The invention relates to a method for producing lubricating oils with high viscosity index.

Lubricating oils with a high viscosity index are usually made by means of produced by conventional methods or by hydrocracking.

Conventionally, lubricating oils with a high viscosity index, as described below. A paraffinic one Crude oil is converted into a number of distillate fractions' (in particular successively in one or more petrol ^ kerosene and light gas oil fractions) and a residue (top residue) separated. This top residue is then reduced by distillation Pressure in a number of distillate fractions (especially one after the other in one or more heavy gas oil, spindle oils, light

machine oil and medium heavy machine oil fractions) and one Separated residue (vacuum residue). From the distillation The lubricating oil fractions obtained under reduced pressure are produced by refining the corresponding lubricating oils. Refining the spindle oil fraction, the light machine oil fraction and the medium-heavy machine oil fraction is obtained by removing the aromatics and paraffin from these fractions carried out. When refining the vacuum residue, this first deasphalted. From the deasphalted material obtained in this way oil, the aromatics and paraffin are then separated off. The lubricating oil produced in this way is called "Brightstock". The paraffin obtained by refining the various fractions of lubricating oil is different depending on the type of The lubricating oil fraction used as the starting material is referred to as distillate or residue paraffin slack.

The production of lubricating oils of high viscosity index by hydrocracking _y is described as follows is performed. A heavy fraction of a paraffin-containing crude oil, such as a vacuum distillate, a deasphalted oil or a distillate or residue paraffin slack, is passed over a suitable catalyst under hydrocracking conditions. One or more Schrräer oil fractions is (are) separated from the hydrocracking product by distillation. From the lubricating oil fractions obtained in this way, the corresponding lubricating oils are produced by separating the paraffin from these fractions »

High viscosity index lubricating oils prepared in the conventional manner or by hydraulic splitting, are used in large

40982-5 / 1050

• ■ - " ^ - - t P υ I ö O ο

used on this scale for the production of multigrade lubricating oils'.

According to the SAE classification, lubricating oils are used for combustion. motors based on their viscosity divided into two groups, referred to as winter or normal oils- »Each of these groups is further subdivided into a number of classes. Winter lubricating oils are preceded by the letter Vi and a

, "■ 'oils

Number, e.g. identified by SAE-5W, SAE-IOW or SAE-2QW. This / must meet certain conditions in terms of their dynamic viscosity at -17.8 ⁰ C. Normal lubricating oils are only identified by a number, e.g. as SAE-2Cb SAE-JO ₃ ^SAE-1 K or SAE-50-Ö1. These oils must meet certain conditions regarding their kinematic viscosity at 98.9 ⁰ C. Lubricating oils that only meet the conditions with regard to one SAE class (either the conditions for a winter oil or for a normal oil!) ... are referred to as single-grade lubricating oils. Commonly used single-grade lubricating oils are the SAE-20 "and SAE-30 oils. In addition to the single-grade lubricating oils, lubricating oils are known that meet both the viscosity requirements for a winter oil and the viscosity requirements for a normal oil These multigrade lubricating oils have the advantage that they are sufficiently thin in winter that they do not cause any problems during a cold start.

. ongoing
temperature of the / motor required for sufficient lubrication

■ have borrowed thickness.

, Important multigrade lubricating oils are the IOW / 3O-, LOW / 40-, -20WAo- and ^ OW / SO oils. The lOW / jO oils meet both d'ie- viscose itat requirements for the SAE-LOW-oil (dynamic viscosity · '409-8--2.6 / 10SO .. ■ -...- ■ * -

at -17 * 8 ⁰ C of at least 12 and at most 24 P), as well as the viscosity requirements for the SAE-3O-Ö1. (kinematic viscosity at 98.9 ⁰ C of at least 9.6 and not more than 12.9 cSt). The 10W / 40 oils satisfy both the viscosity requirements for the SAE 1OW-Ö1 and the Viskositätsanforderüngen for the SAE 40 oil (kinematic viscosity at 98.9 ⁰ C of at least 12.9 and at most 16.8 cSt). The 20W / 40 oils meet both the viscosity requirements for the SAE-20W-Ö1 (dynamic viscosity at -17.8 ° C of at least 24 and at most 96 P) and the viscosity requirements for the SAE-4O-Ö1. The 20W / 50 oils satisfy both the viscosity requirements for the SAE 20W-Ö1 as well as the viscosity requirements for the SAE-5O-Ö1 (kinematic viscosity at 98.9 ⁰ C of at least 16.8 and at most 22.7 cSt). The dynamic and kinematic viscosities given in the present description are determined in accordance with ASTM-D 2602/71 and ASTM-D 445/71.

The production of multigrade oils is carried out in practice by adding a number of quality-improving additives carried out to a base oil composed of a lubricating oil or a Blending of lubricating oils with a high viscosity index, .that £ lie) conventionally or by hydrocracking., As above

Base oil as described, has (are) manufactured, the / as such does not meet the conditions for the corresponding multigrade oil Fulfills.

The additives used in the production of multigrade lubricating oils can be divided into two groups. The first group consists, among other things, of additives for prevention

409825/1050

the oxidation (antioxidants), to prevent corrosion (corrosion inhibitors), to prevent foam formation (Means to prevent foaming) and to prevent of deposits in the engine (detergents) and additives to improve the lubricating effect at high pressure (Extreme pressure additive). The additives of this group show generally a molecular weight not exceeding 10,000 and usually well below this value on. Those brought to market by a number of manufacturing companies Lubricating oil additive "packets" generally settle composed of additives of the aforementioned types. That- clogging such a lubricating oil additive package leads to a base oil even when this additive package is added high concentration only causes a slight change in the -Viscosity index of this oil. Depending on the composition of the additive package, that is added to the oil, the viscosity index of the oil either remains unchanged or increases slightly or even decreases slightly. In the present description, the term "additive package" refers to a mixture of lubricating oil additives understood who belong to the 'aforementioned first group. One property of this mixture is that when it is added to a base oil in a concentration of 15 percent by weight at most to an increase in the viscosity index of this Approach (85 percent by weight base oil plus 15 percent by weight additional paddle mixture) by 10 units compared to the viscosity! index of base oil leads. The second group of additives with quality enhancers Properties that are used in the manufacture of sweeping area oils used, also includes means of improvement the viscosity index. The additives of this group

, generally have a molecular weight which is the value of Exceeds 10,000 and is often significantly above this value.

The use of viscosity index improvers in manufacture of multigrade lubricating oils has serious disadvantages on. -First, assign the compounds used for this purpose with. high molecular weight (generally polyalkyl acrylates and polyalky! methacrylates) only have insufficient resistance to the shear forces occurring in the engine and are also susceptible to oxidation. This leads to the polymers are broken down in the engine, and there is also deposition of breakdown products in the engine, which leads to a continuous decrease in the viscosity of the oil. In addition, a Temporary loss of viscosity when using the oil take place when the polymers are due to the occurring in the engine Shear forces are oriented, leading to a reduction in their internal friction leads. With increasing shear forces it approaches!} the effective viscosity of the oil containing the polymers is that of an oil which does not contain any polymers.

For the above reasons, it can be seen that lubricating oils which meet the conditions for a multigrade oil without adding a polymer viscosity index improver are urgently needed. Attempts to make such oils conventional ways, i.e. by distilling and refining, have not worked.

Investigations into the production of lubricating oils with high viscosity index have shown that these oils are in high

409825/1050

Yields by treating a hydrocarbon mixture with a peroxide can be produced, provided that certain conditions

. ' conditions regarding the starting material used and regarding the conditions applied during the treatment are fulfilled. The investigation has further shown that by means of this ^:

. Procedure completely from the vorbeschriebehen forth · - different conventional or hydrocracking process, lubricating oils can be produced which · the conditions for Mehrbereichsschmierölei particular for low / 30-, low / 40-, 2OW ₇ AO- or 20W / 50 oils, either as such or after adding an additive package, but without the addition of a polymeric viscosity index improver. /

The aforementioned conditions with regard to the starting material used and with regard to the treatment used de ten conditions are described below.

A mineral oil fraction or a mixture of a mineral oil fraction and one or more monoolefin (s) is used as the starting material. with 6 to 20 carbon atoms in the molecule used. Provided that the fraction used as starting material has an initial boiling point. of at least 360 ° C, this must have a paraffin content of less than 10 percent by weight, determined under standard conditions, and the mineral oils used must be either
■ fraktipn / um a thiourea extract of a mineral oil fraction ·

" around
or / act a fraction that occurs in the distillation of a hydro-

, Cleavage product from the hydrocracking of a mineral oil fraction, • has been obtained with a paraffin content of at least ko percent by weight (determined under standard conditions).

Α098Ϊ5 / 1050 '

"Dewaxing under standard conditions" in the present description is understood to mean a process for dewaxing in which a mixture of the paraffin-containing oil and a solvent which contains the components in a volume ratio of 1: 4 is heated to 50 ° C. and then with a Speed of 1 to 2 ⁰ C per minute to a temperature of -3O ⁰ C is cooled. The solvent is composed of equal volumes of methyl ethyl ketone and toluene. The "paraffin content of the oil determined under standard conditions" is the amount of paraffin separated from 100 g of paraffin-containing oil by means of the method described above, ■ /; "■" - "-. ■■

The peroxide treatment is carried out by contacting the feed at elevated temperatures with an organic peroxide of the general formula ROOR ¹ , in which the groups R and R ^{1 are} alkyl, aryl or acyl radicals.

The lubricating oils produced in this way meet the conditions for IOW / 30, IOW / 40, 20W / 40 or 20W / 50 oils either as such or after adding an additive package, but without adding a polymeric viscosity index improver. can be identified as follows.

The low / 30 oils have a dynamic viscosity at 17.8 ° C of at most 24 P and a kinematic viscosity at 98.9 ⁰ C of at least 7.0 cSt, preferably at least 8.4 cSt. The 10W / 40 oils have a dynamic viscosity of at most 24 P at -17.8 ° C and a kinematic viscosity of at 98.9 ° C

at least 10.0 and preferably at least 11.0 cSt.

409825/1050

The 20W / 40 oils have at -17.8 ⁰ C, a dynamic viscosity of at most 96 P and 98.9 ° Ο a kinematic viscosity of at least 10.0 x and preferably of at least "11.0 cSt.. The 20W / 50 oils have at -1> 7.8 ^O C has a dynamic viscosity of at most 96 P and in. 98., 9 ⁰ C, a kinematic viscosity of at least LJ5 * 0 and preferably at least l4,5 cSt at. '

The present invention accordingly relates to a method of manufacture of lubricating oils with a high viscosity index, which is characterized in that a mineral oil fraction or a mixture from a mineral oil fraction and one or more monoolefin (s) with 6 to 20 carbon atoms in the molecule at elevated temperatures is reacted with an organic peroxide, which has the general formula R-O-O-R, in which R and R are alkyl, aryl or acyl radicals, with the proviso that when using a mineral oil fraction with an initial boiling point of at least 5.6O ° C as feed this has a paraffin content of less than 10 percent by weight (determined under standard conditions)

either and that the mineral oil fraction used is one Thiourea extract of a mineral oil fraction or a fraction is involved in the distillation of a hydrocracking product from the hydro-splitting of a mineral oil fraction with a paraffin content of at least 4o percent by weight (determined under standard-- conditions) has been obtained. '

For the production of lubricating oils according to the invention, the starting material can be either a mineral oil fraction or a mixture of a mineral oil fraction and one or more monoolefins (eny with 6 to 20 carbon atoms in the molecule can be used. Before-" ; - ^ / £ 09825/1050 '

For example, a lubricating oil fraction is used as the starting material for the production of the present lubricating oils according to the invention , which was obtained as a residue during the distillation of a hydrocracking product from the hydrocracking of a slack wax. When a residual lubricating oil fraction is separated off by distillation of a hydrocracking product which has been obtained either from the hydrocracking of a deasphalted oil or a slack wax, all components boiling below the desired initial boiling point of the residual lubricating oil fraction are usually removed. However, it was found that when using this residual lubricating oil fraction as a feed to the process according to the invention it is advantageous to use a residual lubricating oil fraction with an initial boiling point below the initial boiling point of the lubricating oil to be produced and the reaction product from the peroxide treatment absutoppen at the desired initial boiling point of the product to the lubricating oil. Preferably, is used with a Anfangesiedepunkt a residual fraction, · of at least 100 ⁰ C is lower than the desired initial boiling point of the product to the lubricating oil. particularly good results are obtained when the at hydrocracking either a deasphalted oil or If the process according to the invention is carried out using a residue fraction with an initial boiling point below the Araang boiling point, the entire liquid product obtained from a paraffin slack is used as starting material for the process according to the invention point of the lubricating oil to be produced is carried out, the latter oils are obtained in considerably greater yield than with a ferric oxide treatment, which is carried out with a

409825/10 50

'. Residual lubricating oil fraction is carried out as such, which has the same initial boiling point as the desired product.

* indicates. Obviously, there is a significant amount of peroxide treatment Part of the light components of the feed converted into lubricating oil.

Another preferably for the production of The starting material used in lubricating oils is a thiourea

extract of a distillate or a residual lubricating oil fraction which has been produced either in a conventional manner or by means of hydraulic fracturing. Thiourea extracts from lubricating oil fractions, which have been produced by treating a lubricating oil fraction with thiourea and obtaining the extracts by breaking down the thiourea adducts formed, have a very high viscosity index and are used as base oils - for the production of IOW / 50-j, 10W / 4o- > 20W / 4.0 and 20K / 50 oils without adding a polymeric viscosity index improver are possible if they have a sufficiently high kinematic viscosity at 98.9 ° C. However, a ^ disadvantage of using Thioharnstoffextrakten in the preparation of these oils is that, the thiourea used for this purpose extracts with sufficiently high kinematic viscosity at 98.9 ⁰ C in a yield of a few percent, based on the lubricating oil fraction obtained .

• thiourea extracts with very high Viskositätsihdex, however, have a rather low kinematic viscosity at 98.9 ⁰ C, can be used in considerably higher yields, based on the lubricating oil fraction are obtained, however, are not suitable as SiCN; Base oils for the production of IQW / ^ ö - »; tOW /%> -, 2ÖW / 40- and £ 0W / 50-

1.-0RiGtNAUlNa ⁹ ^ O. "

oil. However, these are excellent Thioharnstoffextrakte Ausgangsinaterialien for the inventive preparation of 10W / 30, 10W / 40, 20w / 40 and 20w / 50 oils with a relatively low kinematic viscosity at 98.9 ⁰ C.

As already explained above, in addition to its mineral oil fraction, a mixture of a mineral oil fraction and one or more Cg ₂₀ monoolefin (s) can also be used as starting material for the process according to the invention. The monoolefins used as feed together with the mineral oil fraction preferably contain at least 8 and at most 18 carbon atoms. In the process according to the invention, which is carried out using a mixture of a mineral oil fraction ^{and one or more C} 6 2 ₀ monoolefins as "feed" , a significantly higher lubricating oil yield is obtained than with a peroxide treatment, which is carried out with a mineral oil fraction as such without the addition of monoolefins.

Other excellent starting materials for the invention] Her-; lubricating oils are listed below:

a) A hydrocracking product (the entire liquid product), the hydro-splitting of a medium heavy machinery oil paraffin slack, a bright stock slack wax or a mixture of these slack wax has been obtained, or .a residue fraction of the hydro “cleavage product obtained by topping off;

409825/1050 bwei «* - inspected

b) Mineral oil ^{fractions which have an initial boiling point below 36C Q} C and which have been pretreated to reduce their aromatic content;

c) Mineral oil fractions with an initial boiling point below 36Q ⁰ C, which have been obtained in the distillation of either a mineral crude oil or a hydrocracking product from the hydrocracking of a mineral oil fraction

d) Thioharnstoffextrakte of petroleum fractions having an initial boiling point below 36O ⁰ C. ■. ■

The peroxide treatment according to the invention is carried out by means of contacting the addition over a certain period of time at elevated temperatures with an.organischen peroxide of the general formula R-O-O-R carried out in which the groups R and R are the same or are various alkyl, aryl or acyl radicals. Suitable organic Peroxides are e.g. dimethyl peroxide, diethyl peroxide, dipropyl peroxide Di-n-butyl peroxide, diacetyl peroxide and dibenzoyl peroxide. Preference is given to di-tert-alkyl peroxides having 8 to 20 carbon atoms in the molecule, such as di-tert-butyl peroxide, di-tert-amyl peroxide tert-butyl-tert-amyl peroxide and di-tert-octyl peroxide and in particular di-tert-butyl peroxide is used. Because it it has been shown that monoperoxides (in which only 1 hydrogen atom of hydrogen peroxide through an alkyl, aryl or acyl radical has been replaced) practically not with Γ-sineral oil fractions react and therefore not suitable for the purpose according to the invention are, it is essential that in the method according to the invention "Diperoxides (in which both hydrogen atoms of the hydrogen peroxide have been replaced by an alkyl, aryl or acyl radical

i8? t; / inc; fl owginal inspected

are used. The process of the invention ver _r peroxide employed may vary considerably. "Typically, who-.the used .of at least 2.5 percent by weight of the novel process of peroxide, based on the total Zuspejamg. The maximum amount of peroxide used in the present process depends to a considerable extent on the feed used and on the type of lubricating oil with a high viscosity index to be produced. Usually, in the process according to the invention, amounts of peroxide of at most 50 percent by weight and in particular of at most 40 percent by weight, based on the total feed, are used. As gas oils or the thiourea extracts of gas oils are used as feed, considerably higher amounts of peroxide can be required to achieve a sufficiently high degree of conversion of the light fraction into lubricating oil. The reaction time and the reaction temperatures can also be considerable Lich vary, but are usually from 5 minutes to 10 hours, or from 100 to 225 ° C. The peroxide treatment is preferably carried out with a reaction time and at such reaction temperatures that at least 90 and preferably at least 95 percent of the peroxide has been degraded before the end of the treatment. The reaction time depends on the rate of degradation of the peroxide in question and can be shorter the higher the reaction temperature used. The peroxide treatment can be carried out in one stage in which the total amount of peroxide required is fed in in one amount for feed, or in several stages in which in each case part of the total amount of peroxide required is added to the reaction mixture.

4098 25 / 10SQ originally inspected

• '.: .-; . . _Λ . > .i5 - ■. _: V. ■■■ 2361853

If a lei elite "mineral oil fraction, such as a gas oil or a thiourea extract of a gas oil _t . Is used as a feed, so

The process according to the invention can be carried out as follows: the feed is treated with peroxide, the product from the peroxide treatment by distillation into a heavy fraction ^: with an initial boiling point corresponding to the initial boiling point of the desired boiling oil with a high viscosity index, and a corresponding initial boiling point

. light fraction separated. The light fraction is treated again with peroxide and the process is repeated a few times. The heavy fractions obtained from the products of the peroxide treatment by distillation are combined on these Way can a slight feed practically quantitatively in a High viscosity index lubricating oil can be converted.

Is a mineral oil fracture with the method according to the invention? an initial boiling point of at least 360 ° G used as feed, so it is essential that the paraffin content of this. Mine- ■ ral oil fraction (determined under standard conditions) less than 10 percent by weight. It was found that in one higher paraffin content of this' fraction a significant part of the Oil is converted to paraffin - which is probably due to a The binding of the oil molecules to the paraffin molecules decreases. Because lubricating oils with a high viscosity index have a low pour point, should ^ the "paraffin of. the product of the peroxide treatment- • development are separated, which leads to a loss of yield. It also increases the binding of oil molecules to paraffin molecules (and the binding of paraffin to paraffin molecules that probably Peroxide consumption also takes place. Since the as feed for the inventive method for production

: i; '" ■ ^π

The mineral oil fractions used in the present lubricating oils and having an initial boiling point of at least 360 ° C. have generally been obtained from paraffin-containing crude oils, they usually have a paraffin content above the aforementioned 10 percent by weight. They are therefore preferably dewaxed before the peroxide treatment. Mineral oil fractions with an initial boiling point of at least 360 ° C. are preferably used as feed for the process according to the invention _? which have a paraffin content (determined under standard conditions) of less than .5 percent by weight and in particular of less than 2> 5 percent by weight.

In the novel process, a petroleum fraction "with an initial boiling point below 360 ° C, such as a .Hydrospaltungsprodukt (the total liquid product), which has been obtained either at hydrocracking a deasphalted oil or Paraffingatsches, or boiling above 200 or 300 ⁰ C fraction of The paraffin content of these fractions does not matter. It is very astonishing that in this case a paraffin content (determined under standard conditions) above 10 percent by weight has no adverse effect on the results of the peroxide treatment. On the contrary found that in the peroxide treatment of mineral oil fractions with an initial boiling point below 360 ^° C. and a paraffin content (determined under standard conditions) above 10 percent by weight, part of the paraffin is converted into lubricating oil, which leads to an increase in the yield of lubricating oil.

ORIGINAL INSPECTED

409825/1050

If the method according to the invention for the production of IOW / 30-, '. IOW / 40, 20W / 40 or 20W / 50 oils using a maximum of 30 percent by weight, based on the total feed, of peroxide, are used as starting materials for this purpose, preferably mineral oil fractions that meet certain conditions with regard to the viscosity of the oils that can be obtained from the mineral oil fractions by means of dewaxing, meet. If the mineral oil fraction has an initial boiling point of at least 360 ° C, the viscosity requirement relates to 'the dewaxed oil that is also extracted from the mineral oil fraction _; . by means of dewaxing under standard conditions. If the mineral oil fraction has an initial boiling point below 360 ° C, the viscosity requirement relates to the dewaxed oil that has been obtained from the mineral oil fraction after topping off at temperatures of 360 ° to 450 ° C. and dewaxing under standard conditions. The dewaxed öle.müssen having a dynamic viscosity at 17.8 ⁰ C of at least 3 P and a kinematic viscosity at 98.9 ° C of at least 4 cSt. For the production of low / 30-, low / 40, 20w / 40 and 20w / 50 oils by the inventive method preferably are mineral oil fractions are used, the aforementioned corresponding dewaxed oils having a dynamic viscosity at 17.8 ⁰ C and a Kinematic viscosity at 98i9 ° C of at least 5 P and 5 cSt, 5 P and 6 cSt, 10 P and ΐβ. cSt. or 10 P and 7 c'St '. "·

The process according to the invention enables the production of lubricating oils which as such, i.e. without the addition of additives, the conditions for the. SAE-LOW / 30-, LOW / 40-, 20W / 40- or

82-5 / 10 50

2QW / 50 oils. It also enables the inventive

as such · ^ 'process to produce lubricating oils which, although / meet the requirements for

■ 1-0W / 30-, 10w "/ 40-, 20W / 40- or 20W / 50-oils do not correspond which, however, can easily achieve a IOW / 30-, 10W / 40-, 20W / 40- or 2OW / 5O-Ö1 can be produced by adding a

. Adds the correct amount of an additive package. The commercially available additive packages currently used in the manufacture of multigrade lubricating oils contain a number of compounds, each of which when added to the lubricating oil improves certain properties of the lubricating oil in one way or another. Examples of additives contained in the additive packages include antioxidants, rust inhibitors, corrosion inhibitors, antiwear agents, agents to prevent foaming, detergents, metal passivators and high pressure additives. In some cases several quality-improving properties are combined in a single additive. If the lubricating oils produced according to the invention are to be used as engine oils, it is advisable to add a certain amount of the additive package to the lubricating oils, even if these as such already meet the requirements for IOW / 30-, 10W / 40-, 20W / 40- . or 20W / 50 oils. In the production of 10W / 30, 10Wy ² K), 20W / 40 or 20W / 50 oils according to the invention, such an amount of an additive package is preferably added to the base oil (which may meet the requirements for 10W / 30, 10W / 40, 20W / 40 or 20W / 50 oils) that an oil mixture is obtained that contains 87.5 to 95 percent by weight of base oil and 5 to 12.5 percent by weight

Contains additives.

409825/1050

The following examples illustrate the invention "These '_, - examples are tert di-different feedstocks with, butyl * - peroxide treated after the peroxide are the degradation products of the peroxide * (mainly .tert" .- Buty "alcohol!) - by . Flash removed from the reaction product, ·.

'■' - ■ -, ■ '■ B el s ρ i' e 1 ^_1: '\' ■ - ';

Feed: Minerailolfpaktiona as thiourea extract the treatment; · "- ■ with thiourea - one in the conventional way produced (F ^ rifural * .extraction, and deparaf ling under standard conditions) light machine oil and by means of subsequent Degradation of the TMourea adduct has been produced.

Properties aBr feed: / - ·

Initial boiling point ^; ; "_ ¹ OO ⁰ C dynamic viscosity at -17 * 8 C 7 P kinematic viscosity at 98.9 ⁰ C 6 cSt

By treating this feed for 6 hours at 145 ° C. with "4 Ge. weight percent peroxide, the feed is practically quantitative into a lubricating oil with the following properties:

Initial boiling point "

dynamic viscosity at -17.8 ⁰ G 9 P.

kinematic viscosity at 98.9 ⁰ C. ". 6iQ cSt

Viscosity index: ■ I55 ^

409a25710B0

-so- _ 2361853

". Example 2 ~ ·

Feed: mineral oil fraction., Which is produced by Jlydrospalten a medium-visual machine oil paraffin slack. and then topping the hydrocracking product is prepared at 400 ° C and dewaxing of the 400 ° C ⁺ -Fraktian under standard conditions. The paraffin content of the medium-weight machine oil slack, determined under standard conditions, is 71 percent by weight.

Properties of the feed:

Initial boiling point 4GO ⁰ C

dynamic viscosity at -17.8 ° C 7 P 'kinematic viscosity at 98.9 ° € 6.1 cSt

By treating this feed for six seconds at ϊ4 $ ° α ijiit 3 weight percent peroxide, the feed is practically completely converted into a lubricating oil with the following properties!

Initial boiling point 400 ° C '

dynamic viscosity at -17, B ⁰ C 10 P

kinematic viscosity at 98.9 ⁰ C 6.9 cSt

Viscosity index 'I50':

"Example · 3-

Feed: oil fraction, which is used as thiourea extract 'the treatment - with thiourea - a dewaxed one

from 350 to 520 ⁰ C boiling fraction of an African mineral

- - ■■■ .-.

Hollow oil and by means of the subsequent breakdown of the thiourea adducts, '

has been made *

409.825 / 1050 «wmnal / nspected

Properties of the feed;

Initial boiling point '' 350 ° C dynamic viscosity at -17.8 ⁰ C 2 P kinematic viscosity at 98.9 ⁰ C 3.5 eSt \

By treating this feed for an hour at 145 ° C with 27 percent by weight Peroxide, the feed is practically quantitatively converted into a lubricating oil with the following properties:

Initial boiling point. . 350 ⁰ C-dynamic viscosity at -17.8 ⁰ C 11 P kinematic viscosity at 98/9 ° C 6.9 cSt viscosity index · "145

B 'e i s ρ i e 1 4

Feeding in: mineral oil fraction / as Thioharnstoffextrakt in the treatment - with thiourea - on the one boiling fraction Deparaffinate 350-456 ⁰ C and an African crude oil has been produced by subsequent reduction of Thioharnstoffaddukte "·. .

Properties of the feed:

Initial boiling point "350 C

'dynamic viscosity at 17.8 ⁰ C 3 P kinematic viscosity at 98.9 ⁰ C 3.9 cSt

By treating this feed for an hour at 145 ° C with 14 percent by weight peroxide, the feed is practically quantitative

"., vM, k 0 9 8 2.5 / 1 0 5

tatively converted into a lubricating oil with the following properties _: converts:. -

Initial boiling point '350 ⁰ C

dynamic viscosity at 17.8 ⁰ C 8 P kinematic viscosity at 98, 9 ⁰ C 5.8 cSt

Viscosity index 14l

Example 5

Feed: from 350 to 400 ° C boiling distillate fraction of a hydrocracking product that is deasphalted during hydrocracking Oil has been obtained.

Properties of the feed:

Initial boiling point 350 ⁰ C

dynamic viscosity at -17.8 ⁰ C 2 P kinematic viscosity at 98.9 ⁰ C / 3.1 oSt

By heating this feed for an hour at 145 ° C 9 percent by weight peroxide, the feed is practically quantitatively converted into a lubricating oil with the following properties:

Initial boiling point 350 ⁰ C

dynamic viscosity at -17.8 ⁰ C 5 P

kinematic viscosity at 98.9 ⁰ C 4.4 cSt

Viscosity index I35

■ - "-." Example δ -; "'■■■'", "".

Feeds: Mineral oil fractions, which were produced as thiourea extracts during the treatment - with thiourea - of six spindle oils produced in a conventional manner (purfural extraction and dewaxing under standard conditions) and, if necessary, subsequent degradation of the thiourea adducts, initial boiling point 385 of the feed ⁰ Co '-

When these feeds are treated with peroxide, they are practically quantitatively converted into lubricating oils with an initial boiling point of ⁰ C,

The conditions used for 3er BerosidbehanÜlußg and the; The properties of the preserved "SöfötflörUld" are always combined; ^ - ''\>

At the Peroxidbeharidliiftg "Conditions applied

Peroxide, «ew * - ^ - 23.6 23 * 9 28, S S3.1 2?, 2 31 * 2 reaction time, hours, δ, 2 2 2 2 2 -. Reaction temperature, ⁰ C 1% 7 170 170 l? 0 '170 170

dynamic viscosity

of lubricating oil, - -.

at -17, e ° C, I ^ 12. 18 37 21 ^ k 42

.kinematic viscosity
of the lubricating oil
• at 98.9 ° S, est. B ₉ k _'β Λ ι 13.4 10.7 13.3 11.7

'Viscosity index of the lubricating oil, % Θ \ 158 155 157 155

S SS SS ^^ ■ * £ * SS S ^ S ^^^ ι ^^ # βι ^^ ΐ ^ ΐ ^

ORIGINAL INSPECTED 4O9S.25 / 1ÖSI3.

Example 7

Feed: mineral oil fraction, which is used as thiourea extract of treatment - with thiourea - one in a conventional manner (Purfural extraction and dewaxing under standard conditions) produced medium-heavy machine oil and by means of subsequent degradation of the thiourea adducts is. The initial boiling point of the feed is 480 ° C.

The feed is' practically quantitatively converted into a lubricating oil having the following characteristics by östündige treatment of these feeding in at 150 ⁰ C with 25.6 percent by weight of peroxide.

Initial boiling point

dynamic viscosity "at -17.8 ⁰ C 35 P

kinematic viscosity at 98.9 ⁰ C 16.5 cSt

Viscosity index. 151

Example8

Feed: Mineral oil fraction, which was produced as thiourea extract during the treatment - with thiourea - of a paraffin-containing spindle oil distillate and by means of the subsequent breakdown of the thiourea adducts. The thiourea extract is dewaxed under standard conditions. The initial boiling point of the dewaxed Thioharnstoffextrakts is 385 C. for 6 hours by feeding in treatment of these at 150 ⁰ C with 36.5 percent by weight of 'the peroxide feed is practically quantitatively converted into a lubricating oil with the following characteristics

409825/1050

- 25 - 2 ^ 61653

transforms ..

Initial boiling point
dynamic viscosity at -If, 8 ⁰ C 35 P kinematic viscosity at 98.9 ⁰ C .13.4 cSt

Viscosity index V '. 155

Example 19.

Feed: Mineral oil fraction which was produced as thiourea extract during the treatment - with thiourea - a fraction of an African mineral crude oil boiling from 360 to 450 ° C. and by means of subsequent degradation of the thiourea adducts. The thiourea extract is dewaxed at -20 ° C. The dewaxed Thioharnstoffextrakt has an initial boiling point of 360 ⁰ C and a specified under standard conditions paraffin content of less than 10 weight percent. By treating this feed to the east at 145 ° C with 33 * 8 percent by weight peroxide, the feed is practically quantitatively converted into a lubricating oil with the following properties:

Initial boiling point 360 ° C

dynamic viscosity at -17.8 ° C, 59 P.

kinematic viscosity at 98.9 ° C l4.6 cSt

Viscosity index 133

'ExampleO

Feed: kineral oil fraction, which is used as thiourea extract the treatment - with thiourea - one of 30Ό to 420 ° C boiling fraction of a Middle Eastern mineral crude oil and means

- ^ ^: ί; _; ·>, _ 409825/1050. ■

has been made subsequent degradation of thiourea adducts ".. The feed has an initial boiling point of> 00 ° C. DIE feed is 4 times 2 hours at 170 ⁰ C with peroxide

• α

treated, and thereby v / ground per fraction to be treated 10 percent by weight Used peroxide. After each peroxide treatment, a fraction boiling above 400 ° C. becomes the product of the peroxide treatment separated and the remaining light fraction treated again with peroxide. The fractions boiling above 400 ° C are combined and the mixture is dewaxed under standard conditions to produce a lubricating oil with the following Properties in a yield of 50 percent by weight, based on on the feed, receives:.

Initial boiling point -. '. '400 ° C

dynamic viscosity, at -17.8 ° C 46 P.

kinematic viscosity at 98.9 ⁰ C 11.3 cSt

Viscosity index 126

Example '11

Feeding in: petroleum fraction obtained by dearomatization (percolation through silica gel) a boiling of 5OO to 420 ⁰ C fraction of Middle East crude oil-Kineral has been obtained.

Initial boiling point of the feed: J500 C.

exactly these
This feed is carried out 4 times in the same manner as in Example 10

treated with peroxide. The fractions boiling above kOÖ ° C are combined, the mixture is dewaxed under standard conditions, whereby a lubricating oil with the following properties

409825/1050! »ORIGINAL

shafts in a yield of 50 percent by weight, based on the feed> receives; . *

Initial boiling point. 40Q ° C

dynamic viscosity at 17.8 ⁰ C 46 P.

kinematic viscosity at 98.9 ⁰ C 11.5- eSt

Viscosity Index ■ '' '126

s ■

: \ B eis ρ ie 1 12

By treating the feed used in Example 2 for an hour at 145 ° C with 9 weight percent peroxide the feed practically quantitatively converted into. a lubricating oil with the following properties:. '

Initial boiling point '··. 400 ° C · "· - -

dynamic viscosity at 17.8 ⁰ C l6 P

kinematic viscosity at 98.9 ⁰ C 8/8 cSt '. .

Viscosity index 150.

An oil with comparable viscosity properties is made from the above 400 ° C boiling 'feed through without peroxide treatment Topping off the feed obtained at 450 ° C. In this case it is however, the yield is only 50 percent by weight. "· ■

B e i s ρ i e 1 15.

Feed: Mineral oil fraction produced by hydrocracking a bright stock slack wax and subsequent topping of the hydrocracking ^{product at 40O 0} C and by dewaxing the ^{fraction boiling above 2} 100 ⁰ G under standard conditions

, - 40982571050.

been 1st. The paraffin content determined under standard conditions of the bright stock paraffin slack is 79 livestock process,

Properties of the feed:

Initial boiling point. 4oo ° C -

dynamic viscosity at -17.8 ° C 25 P

kinematic viscosity at 98.9 ⁰ C 10.3 cSt

By treating the feed for 6 hours at 145 ° C. with 9 Ge. Percent peroxide, the feed is practically quantitatively converted into a lubricating oil with the following properties:

Initial boiling point - 400 ° C

dynamische'Viskosität bei'-17.8 ⁰ C. 58 P kinematic viscosity at 98.9 ⁰ C 16.0 cSt viscosity index 142

B e i s ρ i e 1 l4 '

Feed: Mineral oil fraction that has been obtained as the entire liquid product (TLP) during the hydro-splitting of a bright stock slack wax. By topping of the TLP at j59O ° C and then dewaxing the boiling above j59O ° C fraction under standard conditions one obtains 48 percent by weight of below 390 ⁰ C boiling fraction, 11 percent by weight paraffin and 4l percent by weight of dewaxed oil. The dewaxed oil has the following properties:

Initial boiling point

dynamic viscosity at -17.8 ⁰ C 12 P

ο ORDINAL INSPECTED

kinematic viscosity at 98.9 ⁰ C 7.5 cSt

409825/105 0

By heating at 1Λ5 C 'for the east. 9 weight percent peroxide the TLP is converted into a reaction product, which according to topping off at 590 ° C and after dewaxing the above 590 ° C boiling fraction under standard conditions one-yield of 4l percent by weight of fraction boiling below 390 ° C, of 9 percent by weight paraffin and 50 percent by weight of

paraffin oil yields. The dewaxed oil has the following properties:;

Initial boiling point. 390 C

dynamic viscosity at -17.8 ° C · 23 P

kinematic viscosity at 98.9 ⁰ C 9.7 cSt viscosity index

From this example that in the treatment of a feeding in a finfangssi.edepunkt below 36O ⁰ C (in the present case, a TLP) with peroxide some of the light components contained in the feed (in this case 7 Gevjichts- percent.) It is apparent to lubricating oil being transformed. Apart from an increase in the dynamic viscosity at -17 * 8 C and the kinematic viscosity at 98.9 ⁰ C, this treatment leads to greater results.

■ · ■ - '"". ·. paraffin

prey. The presence of 11 percent by weight of this feed (= 21 percent by weight of the ^{fraction boiling above 390 °} C.) has no adverse effect on the test results. On the contrary, 2 percent by weight of the paraffin is converted to lubricating oil. . . ·

409825/1050

, Example 15

Feeding in: mineral oil fraction, which have been manufactured during hydrocracking a deasphalted oil and then by means of the hydraulic topping cleavage product at 300 ⁰ C, and dewaxing the boiling above 300 C fraction, under standard conditions "is. (Yield 30 percent by weight of the fraction boiling below 300 ° C., 14 percent by weight of paraffin and 56 percent by weight of dewaxed oil).

By topping off the dewaxed oil (56 percent by weight) 400 ° C. receives 10 percent by weight of a temperature boiling between 300 and 400 ° C Fraction and 37% by weight dewaxed oil. · The latter dewaxed oil has the following properties on: ■

Initial boiling point 400 ⁰ C

dynamic viscosity at 17.8 ° C 27 P ■ kinematic viscosity at 98.9 ⁰ C 9.3 cSt

By treating the feed for an hour (56 percent by weight of the hydrocracking product) at 145 ° C with 7 percent by weight peroxide the feed is converted practically and quantitatively into a reaction product with an initial boiling point of 300 ° C., from which after topping off at 400 ° C 43 percent by weight (based on on the hydrocracking product) of a lubricating oil with the following Features e, r maintains:. ·

Initial boiling point '400 ° C

dynamic viscosity at -17.8 ° C 64 P.

kinematic viscosity at 98.9 ⁰ C "13.3 cSt

409825/1050

Viscosity index 124

From this example daß'beim treating a feeding in again goes out, with an initial boiling point below "36O ⁰ C (in the present case is 300 ⁰ C) with peroxide part of the light ^ peisung present in the additives components (in this case β percent by weight) . Except for a would increase the dynamic viscosity at 17.8 ⁰ C and a kinematic viscosity "is converted into lubricating oil at 98.9 ⁰ C, this method leads to an increased yield. ■.

• Example 16

By treating the feed used in Example 1 for 6 hours at 145 ° C with 13.5 percent by weight peroxide, the feed practically quantitatively into a lubricating oil with the following Properties converted:

Initial boiling point. 430 ° C dynamic viscosity at -17.8 ° C l6 P

kinematic viscosity at 98, 9 ⁰ O 9.1 cSt

Viscosity index 155

. B e i s ρ i e 1 17

* Feed: mineral oil fraction, which is used as thiourea extract the treatment - with thiourea - a "from 400 to 48o ° C boiling fraction (dewaxed at -20 ° C) of an African Mineral crude oil and by means of subsequent degradation of the thiourea adducts has been received. ;

A09825 / 1050,

Properties of the feed:

Initial boiling point of 400 ° C dynamic viscosity at -17, ⁰ .8 C 7 P

kinematic viscosity at 98.9 C '5.6 cSt

under standard conditions of certain,

Paraffin content. <10 wt -.%

By treating the feed for an hour at 145 ° C with 15 percent by weight Peroxide, the feed is practically quantitatively converted into a lubricating oil with the following properties:

Initial boiling point 400 ° C

dynamic viscosity at 17.8 ⁰ C 21 P

kinematic viscosity .. at 98.9 ⁰ C. ■ 8.9 cSt viscosity index '138

All lubricating oils prepared according to Examples 1 to 17 represent lubricating oils produced according to the invention.

According to Example 6, Run 4, and Example l4 lubricating oils produced fulfill the conditions according to SAE-LOW / 30 (dynamic viscosity at 17.8 ⁰ C of at least 12 and at most 24 P and kinematic viscosity at 98.9 ⁰ C of at least 9.6 and at most 12.9 cSt) as such, ie without the addition of additives. The lubricating oils produced according to Example 6, Tests J and 5, and Examples 7, 8, 9, 11, Ij and 15 meet the requirements of SAE-20W / 40 (dynamic viscosity at -17.8 ° C of at least 24 and at most 96 P and kinematic viscosity at 98.9 ⁰ C _- of at least 12.9 and at most l6; 8 cSt).

409825/1050

17 herge-Die according to Example 6, Experiment lind'2, and Examples 7, ΐβ and /

provided lubricating oils that meet the requirements for an SAE-10 \\ ^T / j50 oil

Example 10 do not meet the requirements of Example 6, Experiment 6 and / or were lubricating oils, the dj.e conditions for a SAE-20W / 40-Ö1 do not meet and those prepared according to Examples 13 and 15 Lubricating oils that do not meet the conditions for a'SAE-2QW / 40-Ö1 meet, are mixed with an additive package. There are two additive packages, which are called additive packages A and B "are used. These additive packages differ in terms of the chemical composition of the additives in them contained additives, however, both have practically the same effect, namely antioxidant, rust-preventing Effect, anti-wear effect, anti-corrosion effect. Effect, anti-foaming effect and metal passivating effect Effect, they lead to an improvement in the lubricating effect at high pressures and prevent the formation of deposits in the Engine. Adding additive package A to the lubricating oil results in a lubricating oil mixture with a content of 92.5 percent by weight Base oil and 7 * 5 percent by weight additive package. The clogging of the additive package B to the lubricating oil leads to a lubricating oil mixture with a content of 89.9 percent by weight base oil and 10.1 percent by weight additive package. The properties of the manufactured. Lubricating oil mixtures are listed in the table below. - ·

409825/1050

Tabel

Base oil,

Properties of the base oil without the addition of an additive ρpackets

£ j £ f? I -Viscosi- kinemati-

^ ~ "Ity see Visgemaß

example
No.

dex

dynamic viscous

viscosity did at 98.9 C, -17.8 ⁰ C, cSt P

6.1 164 8.4 12th 40982 6.2
6.6 158
144 8 * 1 / '
11.7 18th
42 cn 10 126 11.5 46 1050 12th
13th 150
142 8.8
16.0 16
. 58 15th 124 13.3 64 16 155 9.1 • 16 17th I38. 8.9 21

Properties of a lubricating oil mixture of: 92.5 wt .- ^ base oil and 7.5 wt .- % additive package A · '

Properties of a Schmjerölgemisches from 89.9 wt -.% Base oil and 10.1 wt -.% Zusatzrnitte Lpacket B

See viscosity kinematics Viscosity index

at 98.9 ⁰ C cSt '

9.7

dynamic
Viscose
at
-17.8 ° C,
P. Visco
urban
index kinematic dynamic
• see Vis - viscose
kosity contributed
at 98.9 C, -17.8 ⁰ C,
cSt · P 15th ■ 168 10.0 24 Oi 161 9.6 55 146 '
127 13.9.
■ 13.5 19th 152 10.0 64 . 144 17.6 76 127 14.8 18th TO
⁵ CO
CD • 19th 155 , 10.2 '24 1653 141 . 1-0.1

From the results summarized in the table above ' . It can be seen that lubricating oils produced according to the invention, the the requirements for a 1OW / 3Q-Ö1 (lubricating oils according to

and the examples game 6, experiment 1 and 2.712, 16 and 17) or for a 2OW / 4o oil (Lubricating oils according to Example 6, Experiment 6, Example 10) not meet, in a simple way in 10W / 30- or. 20W, A0-öie without clogging the usual high molecular weight viscosity index improvers can be converted by adding the additional needle pack Oil A or the additive package B to the corresponding oils clogs. If these additive packages are used according to the invention manufactured lubricating oils that already meet the requirements as such for a 20W / 40-Ö1, you get either a 20W / 40-Ö1 with a better quality (lubricating oil according to example 15) or a 20W / 50-Ö1 (lubricating oil according to Example 13).

409 82 5 / Ί05 0

Claims (1)

Process for · production of lubricating oils rr.it high. Vi oosity index, characterized in that a mineral oil fraction or a mixture of a mineral oil fraction and one or more monoolefin (s) having from β to 20 carbon atoms is reacted in the molecule at elevated temperatures with a peroxide that has the general formula R-O-O-R, in which R and R are alkyl, aryl or acyl radicals, with the hatred that with the use of a Fineralolfrakticn with an initial boiling point of at least 2> 6O "G as feed this has a paraffin content of less than 10 percent by weight (determined under standard conditions) and that the e'ritweder
used mineral oil fraction / a thiourea extract of a mineral oil fraction or a fraction which is used in the distillation of a hydrocleavage product from the hydrospinning of a mineral oil fraction with a paraffin content of r '■: .-.:. ζ ■ "': ■' - ko weight percent (determined under standard conditions) has been obtained. 2. The method according to claim i, characterized in that a lubricating oil fraction as the mineral oil fraction for the feed is used, which is used as a residue in the distillation of a hydrocracking product from the hydrocracking of a paraffin slack has been received. 3. 'The method according to claim 1, characterized in that a fraction is used as the mineral oil fraction for the feed, which is used as a residue in the distillation of a hydro- SADORSGINAL 409825/1050 Fission product from the hydrocracking of either a deasphalted one oil or a slack wax has been obtained and that the fraction in question has an initial boiling point, which is lower than the initial boiling point of the lubricating oil to be produced, and that the product is subject to peroxide treatment the desired initial boiling point of the oil to be produced / lubricating is topped off. · k. Process according to Claim 3, characterized in that a fraction with an initial boiling point which is at least 100 ° C below the desired initial boiling point of the lubricating oil to be produced is used as feed. 5. The method according to claim 4, characterized in that the entire liquid product from the fraction for the feed the hydrocracking of either a deasphalted oil or a Päraffingatsches is used. . "- 6. The method according to claim 1 / characterized in that a thiourea extract as the jvunal oil fraction for the feed a distillate or a residue lubricating oil fraction is used will. '- -. . -7. Method according to claim 1, characterized in that as a mineral oil fraction. a hydrocracking product for the feed (the entire liquid product) from the hydro-splitting of a medium heavy machine oil paraffin slack, a bright stock slack wax or a mixture of these slack waxes or one obtained by topping off the hydrocracking product 4Ö9825 / 1050. , ■ - 38 - ■ · ■ Residue fraction are used, 8th.· . Method according to claim 1, characterized in that a mineral oil fraction with an initial boiling point below 360 C is used as a feed to reduce its.'i Aromatic content has been pretreated. 9. The method according to claim 1, characterized in that a mineral oil fraction is used having an initial boiling point below 36O ⁰ C as feeding in that in the distillation of a crude oil or a hydraulic Kineral-cleavage product from the hydrocracking of a mineral oil fraction obtained either v / orden, 10. 'The method according to claim 1, characterized in that a thiourea extract as the kineral oil fraction for the feed a mineral oil fraction with an initial boiling point below 3> 60 ° C is used. . 11. The method according to claim 1 to 10, characterized in that that a monoolefin with at least 8 and at most 18 carbon atoms feed contained in the molecule is used. 12. The method according to claim 1 to 11, characterized in that the feed with a di-tert-alkyl peroxide with 8 to Carbon atoms in the molecule is contacted. 13. The method according to claim 12, characterized in that the feed is contacted with di-tert-butyl peroxide. 409825/1050 '--i ^' v. ..- ■. ■ - '... ^: '"23B1B53- 14 * Method according to claim 1 to 13, characterized gekehttieiöhnßtj that the peroxide. in quantities of at least 8.5 and at most 56 Weight percentage based on the entire Büspelöüng, dwell becomes »-". -. ■ · ■ " 15 »Method according to claim I4j thereby. kiss & ichneti. that the peroxide is used in quantities of at most · % Ö öewlöhtsprozenti bfesogeh on dife totalö ZüspeiBungj ₄ ■ -.-. " 16i ·· ■ Process according to claims 1 to: 15, characterized in that · that reaction times and R h from 5 minutes to 10 hours or from 100 to 225 ° C v / erdem. ; · * · - 17s failure haoh claim l6j thereby gekenhaeichnetj that i the pefoxide treatment with such reaction times and with ßolöhen Heaktiön Temperaturien is implemented that at least 90 percent of the peroxide must be broken down before treatment * 18 «procedure-hash Ähsg ^ üeh ITi characterized in that the Peroxidbfehänd-lühg with 'feoichen. Response times and such ReäktiohstBmperatUrQtt düröhgö leads that at least 95 percent des Per: öxidg be dismantled before Seenaigmhg treatment, 19 * Verfehreh nah Ähspröh Ϊ to l8i dädurGh gekenhzeiGhnetj: that a minor mineral oil fraction, such as an oil or a thiourea extract of a gas oil, is treated with peroxide, that , the product of the peroxide treatment by DeBfeillätiö'h in a heavy fraction with the lower boiling point of the desired "" "A09Ö25 / 10S0 - ho - ■ Lubricating oil with a high viscosity index and a light fraction is separated that the light fraction once more with peroxide treated so that the process is repeated several times and that the heavy fractions obtained from the products of the peroxide treatment by distillation are combined. 20. The method according to claim 1 to 19 * characterized / that as a feed a mineral oil fraction with an initial boiling point of at least 360 ° C and a paraffin content (determined under standard conditions) of less than 5 percent by weight will. '"". 21. The method according to claim 20, characterized in that as a feed, a mineral oil fraction with a paraffin content (determined under standard conditions) "of less than 2.5 percent by weight is used. 22. The method according to claim 20 or 21, characterized in that a mineral oil fraction is used as feed which has been obtained from a paraffin-containing crude oil and the before the peroxide treatment has been dewaxed. 23. The method according to claim 1 to 22, characterized in that that the peroxide is used in amounts of at most 30 percent by weight, based on the total feed, and that IOW / 30-, IOW / 40, 20W / 40 or 20W / 50 oils (as defined above) a mineral oil fraction can be produced as a feed which meets the following conditions with regard to the viscosity of the Oil obtained by dewaxing the feed 409825 / 1Q50 - 4i - is fulfilled : is a) where a Mineralcilfraktion with an initial boiling point of at least 360 ⁰ C used, the .This by dewaxing mineral oil fraction obtained under standard conditions dewaxed oil a dynamic viscosity at 17.8 ⁰ C of at least & P least 3 and a kinematic viscosity at 98.9 ⁰ C of at least 4 cSt, b). provided that a petroleum fraction is used having an initial boiling point below 36O ⁰ C, so weist.das obtained from this mineral oil fraction by topping at temperatures of 36O to 450 ⁰ C and under standard conditions dewaxing the dewaxed oil. under a) conditions described in terms of viscosities. 24. The method according to claim 23, characterized in that for the production of IOW / 30-, IOW / 40-, 20W / 40- or 20W / 50- 'ö.l.en mineral oil fractions are used as feed, their corresponding dewaxed oils according to claim 23 "a dynamic viscosity at -17.8 ⁰ C and a kinematic viscosity at 98.9 ⁰ C of at least 5 P and 5 cSt, 5 P and 6 cSt, 10 P and 6 cSt or 10 P and 7 cSt. 25. The method according to claim 1 to 24, characterized in that dai3 IOW / 30, IOW / 40, 20W / 40 or 20W / 50 oils with a kinematic viscosity at 9C, 9 ° C ^of at least 8.4 , 11.0, 11.0 and 14.5 cSt, respectively. SAD QRiGiNAL '... .409825 / 10.50 '. - 26. The method according to claim 1 to 25 »characterized in that that lubricating oils are produced which, as such, meet the requirements for 10W / 30-4 1 GW / 40-, '20W / 40- or 20W / 50-oils,' i.e. without clogging ' of additives. 27. The method according to claim 1 to 25, characterized in that that mineral oils are produced which, as such, meet the requirements for low / 30, lOW / 40, 20W / 40 or 20W / 50 oils, _d.h. without clogging of additives, do not meet, and that from these oils 10W / 50-, 10W / 40, 2OW / 4o-t or 2OW / 5O oils can be produced by using adds an additional package to the first-mentioned lubricating oils, which no high molecular weight viscosity index improvers contains. >. -. 28. The method according to claim 26 or 27 » characterized in that IOW / 30-, 10W / 40-, 20W / 40- or 20W / 50 oils are produced, the 87i5 to 95 percent by weight of a base oil that optionally meets the conditions for 10W / 30-, 10W / 40-, 20W / 40- or 20W / 50-oils, and to 5 to 12.5 percent by weight of an additive package that does not contain any viscosity index improvers with a high molecular weight. 409825/1050