AT400242B - Additive for unleaded Otto fuel - comprises alkali salt of saturated branched mono-carboxylic acid, detergent and opt. anticorrosion agent and de-hazer, opt. in carrier oil, protecting against wear and improving ignition - Google Patents

Abstract

An additive for unleaded Otto fuel, contains (a) an alkali metal salt of a satd., branched, 7-14C mono-carboxylic acid, (b) a detergent, and opt. (c) an anti-corrosion agent and (d) a de-hazer, opt. as a soln. in a carrier oil.

Description

AT 400 242 B

The subject of the present invention is "sr e" an additive for unleaded "petrol", which in omioi iim "serves as a protective and ignition impregnator" r and the at least one AUralimotnll salt at least "in organic carboxylic acid" and one Detergens eowio gogobononfotls contains a »corrosion protection and a dohazor, optionally as a solution in a carrier oil. The invention also relates to an alkali metal detail for a permanent additive, concerns a vcrinhrone for the production of these alkali metal components and for the production of the entire additive, and finally relates to an unleaded petrol containing this additive.

With the introduction and spread of unleaded gasoline, the problem has arisen that vehicles which could be operated without problems with leaded gasoline suddenly showed dramatic valve seat wear 10 on the exhaust valve when unleaded gasoline was used.

To remedy this, measures are conceivable on various bases:

Firstly, changes to the valve seat due to changed insert moles, hardening of existing metals and armoring of the valve seats have been considered. This measure has also been implemented for Neuwagun, but is hardly profitable for old-fashioned trains. v :. Secondly, the adverse effects can be achieved by taking measures on the lubricants and

May be combated.

The third possibility, which also divides the scope of the present invention, is the development of fuel additives, with the aid of which the adverse effects of the unleaded fuels are to be eliminated. ; * e These wear protection additives protect the valve seats of gasoline engines and enable the use of lead-free petrol also for the operation of all-vehicles, where a subsequent improvement of the valve seat cannot be considered for cost reasons. But even in new engines they oirie should save soo and allow better combustion of the fuel.

Cs has now emerged as the development progresses that the use of z! ≫ alkali metal additives in this direction leads to good success.

Alkaline neilhalogc additives have been known for a long time. Thus, in 1957 the GB-HS 785 (Bataafsche Petroleum Maatschappii) never described the use of ÜBösliohor polyvalent sodium salts of organic acids as detergent additives for lubricating oils. The acids used are mainly phosphorus and chlorofluoric organic acids, which are reacted in the form of oil solution with aqueous solutions or suspensions of oil-insoluble alkali compounds

In the case of an improved process for the production of such sets, which is said to lead to a higher basicity of the products produced, work is also carried out in the presence of water and, as an alkaline reaction capsule, Kaburn carbonate is produced in situ. jti Sutern ever roino carboxylic acids are used, care is taken to make them as hydrophobic as possible by installing long carbon fiber cowls.

For this purpose, potassium salts of hydrocarbon-substituted succinic acid have been commercially available from Shell (GB-PS 2 177 418 and EP-A1-0 207 5Ö0) for some time. The Kahfon hydrogen substituents on the alpha carbon atom (s) of this succinic acid have a 4 " Length from 2t) to 200 kohlaloff atoms.

The hydrocarbon-substituted succinic acid derivatives are the subject of an extensive older and newer patent law. The Irnrdderivato diosor substances are used alone or in combination with other additives because of their dispersing action.

Independently of it is e.g. in major OE-OS 2 029 604 (Lubrizol) an additive combination for cow water-based products. especially for cutting-edge. Hygienic balls as well as crane and brown tassels angogeoen, soft combination based on metal salts hydrocarbon subsitimizing mono- or polycarboxylic acids consisting of hydrocarbons; the substituted mono- or polycarboxylic acid «has an average length before» at least a little about 30 carbon atoms. The disclosure of U.S. Patent 4,804,389 (Lubrizol) is similar. are described in the fuel composition. the soluble or okiispefflierhare alkali or Hrdalkalimetallsal / .e melwbasische Oaihonsäurnn contain as additives. As such, for example, the salt of hydrocarbyl substituted carbortic acid, in particular from carbon dioxide substitute amber duro, has been mentioned. The anionic veil of these salts is said to have a molecular weight of 400 to 2000. .Q »o Hydrostotl filters are as polyhulün. Polypropylene. EtfiylwVPropylen-Copolymers and Mixtures (jorsclbiin fv.r defined

Also in the name of the Luhrizoi company is the application WO 87/01126 (PCT / USe6f01682), according to which very generally an alkali metal or alkaline earth metal solution which is soluble in kutuan water is dispersed with dispersants. Btei scavenger and or aluminum. Silicon ·, molybdenum, lithium. Calcium or

AT 400 242 B

Micgnesiun ivurbtnctuiiq «n is combined to be used as an additive to essentially essential oils for combustion engines. Regarding the type of Alkall · or FriJiilkaliziisammönnung used is explained. dal he > these are salts of sulfuric or phosphorous-containing acids, carboxylic acids or phenols. Specifically, only the sodium salts are used as salt: > organic sulfonic acids, no further details are given for the carboxylic acid. I'aisächlirh are you the Sulfonsäuxmize > r. Combination with detergents and other additives, such as anti-wear protective additives, commercially.

The fcP-Ai u 30 / BIS (BASF) applies to fuels. in which small amounts of copolymers dos maleinsäureanhyclrlds with olefins or Alkyh / inylethem, whose carboxyl groups are fully or partially reacted with io alkali or Erdalksll to form the corresponding salts, are included as an additive

Since it has been known for a long time. that the positive effect of such additives on the alkali component thereof is to be attributed to zorijek. has also been pre-mixed (EP-A1-0 288 2516, BP), inorganic alkali salts. such as borates and carbonates as a fuel additive

Also for better stabilization of diesel oil and heating oils during storage, the ro. Use of oil oil alkali and alkaline earth compounds was provided. EP-Al 0 283 294 <Exxon) mentions a wide variety of organic alkali * and alkaline earth salts for this purpose, which are said to prevent the formation of deposits and discoloration in diesel and heating oil during storage.

It can be seen from all these references that there is a great need for additives which have a positive influence on the properties of the fuels in various respects. However, only a few of the various proposals published so far have actually prevailed. Of these enlspter.hon the sulfur and phosphorus-reverberant products according to hmi'jgen terms no longer meet the requirements regarding environmental friendliness and also represent a poison for the 3-way catalytic converters in modern motor vehicles. Other products 3 are in part too expensive the manufacture and .J5 are therefore to be rewarded for reasons related to wii Esch. The addition of inorganic alkali salts was not found to be citing.

In general, it can be said that alton's proposed phosphorus- and sulfur-free organic acids have always been long-chain. Hydrogen-soluble substances are concerned The use of short-term carboxylic acids has never been considered for the purpose mentioned, since it was evidently always believed that such rather hydrophilic substances would be unsuitable in this context.

The requirements for additives for unleaded petrol range from avoiding the formation of deposits in the engine, to improved detergent efficiency and strengthening, to corrosion protection. In particular, vöibossorton protection of the valves, the clean-in effect in the intake manifold in the sense of a gasoline engine, the prevention of the formation of deposits on the intake valves and in the combustion chamber as well as the sticking of the intake valves at low temperatures require particularly critical consideration. &lt; five strength additives additive (ignition imprevors) also increase the ignition speed and result in a better and more uniform combustion of the fuel.

Zioi dar invention is to provide an inexpensive additive for unleaded petrol, which prevents the formation of deposits in the engine, protects it from excessive wear, at the same time has good corrosion protection and Dotoigoriswiikung and has an ignition strengthening effect; In addition to this, the entire range of tests which are generally customary in the state of the art for carbon fiber components must also be complied with. Surprisingly, it has now emerged. that such an additive for unleaded QttokrnH is uoffo dor the dose of at least one alkali metal salt of at least one organic carbomic acid in combination with a detergent and, if necessary, with a solution, if necessary as a solution and a daily oil. It is particularly good to produce deep and economically favorable properties if, according to the invention, the alkali metal 3Dl consists of the salt of at least one saturated, branched, monovalent (C / -Ci «) caibonic acid. -, c A potassium salt is preferably used as the alkali metal salt.

The advantages of this olively short-chain, saturated carboxylic acid over unsaturated carboxylic acids are stability against oxidation and polymerization. Compared to straight chain carboxylic acid. the branched carboxylic acids used in accordance with the invention have more solidification melting points (below • 60 * CI). These favorable properties are associated with good solubility without gel formation. ·. ·? · These advantages can be achieved without the use of the inventive gif measure Aifdilivn. The disadvantages and chewing would have to be taken. The clean-keeping effect in the motors is excellent. The appearance of deposits is extremely low. Regarding the environmental additive of the additives according to the invention, it must be said that the biodegradability of the active substance component is extremely good / »3

AT 400 242 B is designated.

Thus, the use of relatively hydrophilic compounds as alkali metal additives for additives for motor fuels was successfully proposed for the first time.

The above-mentioned advantages of the new fuel additive come into play when the old one contains dor i carboxylic acid or at least one saturated, branched (Cy-ii) carbonic acid. preferably one (Ci •• c) -C5amons «uie. it has been shown that both the salts of lower carboxylic acids and also higher carbon acids than those in the range from 7 to 14 carbon atoms are less advantageous than the salts used according to the invention. to Isooctanoic, isononanoic and isodecanoic acids are mentioned as particularly cheap to use. These acids are relatively cheaply available in almonds, they are liquid under normal conditions and easy to handle.

Oio Vorarboitbarkoit and the viscosity properties of the additive according to the invention are favorably influenced. who # i om solvent in it lot. which, for practical reasons, preferably originates from the production of the carboxylic acid salt or aalzgomisches. As such, a glycol ether with 3 to 14 carbon atoms, preferably with 5 to 7 carbon nanofheromers, is more advantageously used.

Butyiglycol. a soft name in the technology of n-butyl doses of ethylene glycol is an advantageous product from this drug category. It has a high flash point, its melting point is -75 * C, its boiling point is 171 * C, to The glycol ether, especially butyiglycol, is used as a solubilizer for the alkalis in the manufacture and processing of additive components and as a solvent for tars and resins In the engine, which supports the detergent that is also present in the additive. He loosens the candle. which are then ahgotragnn by the detergent. Small amounts of water, which originate from the production process of alkaline sides and are trapped in the additive in the further processing of the same, in whatever way, but above all by i ’£» condensation, have been exempted from the Gtycotother and their adverse effects inhibited

The proportion of cllykoiethois in the finished additive is preferably at least b% by mass. especially about 10% corn. An amount of 5% by mass to 2S% by mass, preferably from 10% by mass to 15% by mass, glycol titer in the additive is usually the most favorable. The addition of detergents to fuel additives to improve the cleaning effect is common. Most of these are polybutensuccinimides, polybutenamines or polyethoramino. These additives are offered by some additive suppliers who only publish their detergents little about their chemical composition. The formulation and malecular weight advantage are practically unknown. jä Another part of all modern additive packages are the so-called &quot; Irägeröic &quot;. These either consist of mineral oil fractions or they are synthetic products such as Poly-aipha-Oietinc. The same applies to this »substances with regard to the familiarity of their composition as for the detergents.

The use of known dehazer substances reduces the effects of possible high water contamination or fuel remains clear and clear, the phase interface is sharp and no solids are deposited. The effect of the glycol heart generally reduces the amount of dehazer substances required.

If necessary, the entire additive package can be diluted with kerose, which may also contain aromatic components, for easier preparation, solubility in gasoline and lower viscosity at low temperatures. With the help of this thinner, viscosity levels of around 800 cP at -20 'C can be achieved, which have proven to be favorable for European conditions.

A Kraftfotf for gasoline engines, which contains an additive according to the invention, corresponds to the requirements placed upon it if it contains 0.0t milligram equivalent to 2.5 milligram equivalent AikaiimetaH per kg Kraftfotf. The preferred range is between 0.02 mG and 1.0 mG. in particular between tio 0, i and 0.25 mG alkali metal per kg of fuel. For the preferably preflashed potassium, this means that a potassium content of 0.5 mg - 100 rng prn kg of fuel is used. The preferred range is »1 mg to 30 mg. in particular 5 mg to 10 mg of potassium per kg of fuel

The necessary amounts of alkali of the additives are heavily discussed in &lt; Jer experts. In some TSlInn ss 1 to 2 mg of potassium per kg of fuel are regarded as effective, so that certain Kratistolläri can also meet very small amounts of the additive according to the invention.

Another aspect of the present invention is that a preferred alkali metal grain ponenta lüi the additive package mentioned is provided. This exists for educational purposes! from solution 4

AT 400 242 B of at least one alkali metal salt of at least one saturated, branched, monovalent <Cr * Ci4) carbonson in a (C3-C1 .Ü-Glykotethcr. 8), the AlkallmetollsaU is preferably a potassium silicate, in particular in an amount of 6.5 Maas ”- up to 8.5 mass% is contained in the component. Preferably, the“ potassium mono? Masso% bi ”? 5 masso%. This relatively high percentage distinguishes the invention-free Atkalimetoll compouenle from the products of the prior art , in which the Regol contains only about 1% by mass of alkali metal As mentioned, the alkali metal is the essential constituent of such additives, which is why a higher content thereof is always advantageous and the amount of additive to be added is reduced accordingly.

If the alkali metal component according to the invention is used in an additive for unleaded gasoline, the detergent concentrate can be kept relatively low if the glass system is kept sufficiently clean. As a rule, alfcali metal component and detergent component are »in a ratio of 1: 3 to i: 5. preferably 1: 4. mixed.

The invention further represents a process for the production of this alkali metal component. for the manufacture of the entire additive. In the present invention, this ancestor is characterized in that essentially anhydrous alkali metal hydroxide is suspended in a solution of the saturated, branched, monovalent (C7-Cu) -carboxylic acid in at least one (C3-Ci ») glycol theft and Qis to disappear the t-substance Stir is heated.

The reaction is particularly advantageously carried out in a &lt; C $ -C?) - &lt; 3lyfcolether. carried out in particular in butylglycol, which is left dormant as a solvent in the alkali metal component according to the invention.

This method according to the invention is simple, technically easy to carry out and represents a particularly elegant method for producing an alkali metal component for an anti-wear additive based on alkali metals, since the solvent from the production of the carboxylic acid salt not only does not have to be separated off. but even achieves beneficial effects in the product obtained, z »The powdered, technically pure alkali hydroxide is added to the acid dissolved in the glycol ether and the reaction tubes are heated to a temperature of about 60» 80 * C. The resulting reaction water can remain in the mass and does not interfere, it is taken up by the glycol and kept in solution. The presence of small amounts of water in the finished additive has by no means proven to be a disadvantage. w The method according to the invention makes it possible in a surprising and pleasing manner to use the abovementioned. to achieve a relatively high alkali metal content in the desired product. Thus, relatively large effects can be achieved by using relatively small amounts of additive.

The grain size of the Aika Jim detail hydroxide is expected to influence the reaction rate. As a rule, the alkali metal hydroxide is used in powdered, granular or granulated torrents, preferably with a particle size of 10 μm to 100 μm.

If, as is preferred, the carboxylic acid salt is used directly from the production process in the gemstones with the glycol ether as the alkali metal component for the wear protection additive, the mass fraction of the carboxylic acid salts is generally about at most 60%. preferably about 40% to 50%, the rest consists of solvent. vo The detergent is generally used as a solution in the carrier, so that when the salts are mixed with the detergent, the constituents solvent and carrier oil must be taken into account. As a simple rule it can be said that 1 part by weight of alkali metal component is premixed with about 4 parts by weight of the detergent optionally mixed with carrier oil.

The invention also shares a method for producing a complete wear protection additive for 4S, in which the alkali metal components heard according to the above variable are mixed with a detergent and optionally with a corrosion protection and a dohazer, preferably with a carrier oil, in such a ratio that the Manufactured additive contains 0.5% by mass to 1.5% by mass of AlkelimetaH.

As already mentioned at the outset, the invention also provides an unleaded petrol which contains the additive according to the invention in such an amount that 0.01 kg / kg of fuel, preferably 0.02 mg / ml atom, preferably 0.02 mg / ml atom to 1.0 mg / kg atom per kg of fuel , in ^ concrete mandrel Oi milligram atom to 0.25 milligram atom alkali metal

When the alkali metal is potassium. the fuel contains 0.5 mg to 100 mg. preferably 1 mg to 30 mg, in particular 5 mg to 10 mg, potassium per kg. : &gt; £ &gt; The invention is now explained in more detail in the following examples, from which the advantages and the general applicability of the inventive metallic metal components as well as the additives produced therewith and the advantages of the inventive method for producing dnrsolbon emerge. 6

AT 400 242 S.

Production of a Kjjteeifo most commonly used carboxylic acids are isooctanoic, isononane and UedfjcansSure: io

Isooctanoic acid: MO: Kp .: d: Fp .: V20: Loosened wedge in water:

144 220-237 * 0/1013 mbar 0.313-0.917 &lt; -60 »C 7.5 mbar.» Ο, *% M at 20 * C

Isononansäuro: MG Kp. Ei Pp- Vse Solubility in water 158 233 - * C / 1013 mbar 0.B97 · 0. &lt; * 60 * C 11.7 mbar.s 0.3% M at 20 * C isodocanoic acid: MG 172 Kp. 252 - 272 * 01013 mbar d 0.904 * 0.907 Mp. -Eo * c V20 10 mbar.s Loessichoite in water 0.1% M at 20 * C 30 The following was found to be favorable for isodecanoic acid: Ro2optur: 34.5 Ge. Parts isodecanoic acid 11.0% by weight »loctm. pure potassium hydroxide (Θ2%) 54.5 parts by weight of bulylglycol j * &gt; The suspension of potassium hydroxide in the mixture of isodecartic acid and butyl glycol is heated. At a reaction temperature of 60 * C to 80 · C the reaction starts and can be continued without problems. Thus, contrary to previous experience, it was possible to work successfully in a water-free system.

The potassium content in the reaction product was 7.2% M. The reaction product was mixed with the detergent directly without further processing for 4 days and as an additive to unleaded petrol fuels. It has to be considered. The detergent is usually available as a solution in a carrier oil, which is why it is better to speak of a detergent component in this case than of a detergent itself

The mixing ratio of alkali component to detergent particle size is preferably t; 4, -s i.e. 140 g of alkali component are mixed with 580 g of detergent to give 700 g of the finished additive ru. This amount is preferably added to 1000 kg of unleaded gasoline, so kg of fuel contains about 140 mg of alkali components, which in this case corresponds to a content of about 1 mg of potassium per kg of gasoline.

A corresponding recipe for isooctanoic acid is: 30.7 parts by weight of isooctanoic acid 11.6 parts by weight of technically pure potassium hydroxide and 57.7 parts by weight of butyl glycol

An output converted according to the above information gave an alkali metal component for a base additive which contains 8.1% M potassium. This alkali metal component is again mixed in the ratio t: 4 below with the dotor gene component. E.g. about 130 g of the alkali metal component obtained above have been mixed with about 520 g of detergent component and provide an additive which, in addition to 1 (XX) kg of unleaded petrol, gives it a potassium content of about 10 mg per kg. ß

Claims (19)

AT 400 242 β Application games To show the positive footing of odinduogsoornäflen fuels on the lead from not particularly «hardened exhaust valves In gasoline engines 2U, a comparative test over 50 hs is carried out on the engine test bench, Sn test engine of a type with GiauguB cylinder optics frequently represented on the market Specially hardened Aüsiaeventilsiize is operated for 50 hours at high load and close speed, whereby once unvertiloiter, commercial fuel is used without and once with the additive according to the invention in the amount specified above. After completion of the tests, the valves of the engines, which are generally drunk with unleaded fuel without additives, show a depression which, as a result of regular valve spool re-adjustment, is a multiple of the valve clearance prescribed by the manufacturer. In contrast, during operation with unleaded fuel, which contains the addition according to the invention in the dosage mentioned, only a minor one * sound, which is a fraction of the prescribed valve clearance, can be measured. rb application examples »! 2 To show that unleaded fuel with the additive according to the invention does not adversely affect the viability of a modern exhaust gas purification system in the gasoline engine (L-probe; 3-way catalytic converter), even in slow operation, a vehicle endurance test with vehicles of the same type over 80,000 km? O carried out. Here was a vehicle with commercial unleaded petrol without and with an additive according to the invention in operation in the dosage tested in application example 1 in controlled road operation. The effectiveness of the exhaust gas cleaning system and the comparability of the emissions of both vehicles was checked at Teetbegirw in accordance with the Austrian regulations for exhaust gas typing. ? 5 After the end of the driving test, the vehicle that was operated with unleaded petrol plus the additive according to the invention in the stated dosage is measured slightly better than the value of the vehicle that was driven without the additive. The exhaust gas limit values for CO », HC and NO * specified in the typing regulations are significantly undercut. However, the differences between the measurement results of the two vehicles lie in the range 30 of this measurement method. 1. Additive for unleaded petrol, which is used in particular as a sealant and Zündkrattvarstäiker 33 and at least one alkali metal salt of at least one organic carboxylic acid and a detergent and optionally amen corrosion protection and a dehazer. optionally as a solution in a Trageroi. enticed, characterized in that the Aikalimetaüsaiz consists of dom salt of at least one saturated, branched, monovalent (C »-Ci r) carboxylic acid. • w 2. additive according to claim 1, characterized in that the alkali metal salt is a potassium * !? is 3- additive narb claim 1 or 2, characterized in that the alkali metal salt from dom salt of at least one saturated, branched, monovalent (C, -Cr, i) -carboxylic acid, preferably one (Ci-Cr α (-carbons auro 16 4. Additive according to one of claims 1 to 3, characterized in that the alkali metal salt from the 9aiz consists of at least one of the acids isoocian, isononanoic and isodecanoic acid. 5. Additive according to one of claims 1 to 4, characterized in that cs a (CrC, *) - iio glycol ether, preferably a (C * &gt; -C7 &gt; -Gly kßlafhor, especially n * 8utylglycol, in an amount of at least 5 Masso%, preferably at least 10% by mass, insheRorv.toro of about 25 Masce-'k .. contains G. Unleaded gasoline, characterized in that it contains an additive according to one of the claims that per kg of fuel 0.01 milligram atom to 2.5 milliammamm atom, preferably 0.02 milligram atom to 1.0 milligram atom, in particular 0.1 milligram atom to 0.25 milligram atom, of alkali metal / AT 400 242 B 7. unleaded petrol according to claim 8, characterized in that it 0.0 mq to 100 mg. preferably 1 mg to 30 mg, in particular S mg to 10 mg, of potassium per kg of fuel. 8. alkali metal component for the preparation of an additive according to claim 8, characterized in that η ϋββ sio from the solution of at least one alkali metal eel at least one saturated. branched. monovalent (Cr-Cu.) - Caibonsäuie in a (Ci-Cn) -glycolothor. 9. AtkalimetaUkomponeme according to claim 8, characterized in that the Aikaiimetailsaiz is a potassium salt. '0 10. alkali material component according to claim 9, characterized in that they G.5 Maase% to 3.5 mass%. preferably 7% by mass to 7.5% by mass. Contains potassium. 11. AJkaiimctallkorr.ponente according to any one of claims 8 to 10, characterized in that the r, alkali metal salt is the salt of at least one saturated, branched, monovalent (C, · CiJ-carboxylic acid, preferably a (Ci-Cio) carboxylic acid. 12. Aikaiimetallkomponento nacti one of claims 8 to n, characterized in that the alkali metal salt is the salt of at least one of the acids isooctanoic, Isononart- and isudecarutäure. 20th 13. alkali metal component according to one of claims 8 to 12, characterized in that it contains a (Ci-VrGlykolether, especially n-butytgtykal. 14. A | Kalimotatikompononto according to one of claims Θ to 13, characterized in that it contains the to glycoiether in an amount of at least 40% by mass, preferably in an amount of 50% by mass to 60% by mass, 15. A process for the preparation of the alkali metal component as claimed in one of claims Θ to 14, characterized in that substantially anhydrous alkali metal hydroxide is suspended in a solution of the saturated, partially, branched, monovalent (C / -C 1 C) carboxylic acid in at least one (Ca-Cn) glycol ether and bs to disappear the solid is heated with stirring. 16. The method according to claim 15, characterized in that at least sine saturated, branched, monovalent (C7-Cf2] -carboxylic acid, preferably at least one (CVCicV-carboxylic acid, J5 is used. 17. Process according to claim 15 or Hi, characterized in that that at least one of the acids isoocfartic, honenanic and isodecanoic acid is used. 18. Process according to one of Claims 15 to 17, characterized in that the reaction is carried out in at least one (Cs-C?) glycol ether, preferably in n -Bulylgiykol is pre-named. 19. Ancestor according to oinoin of claims 15 to 18, characterized in that technically leirwi alkali metal hydroxide is used. 20. The method according to any one of claims 15 to iS, characterized in that the Alkaiimeiailhydro-oxide in powdered, granular or granular form, preferably with a grain size of 10 to 100 microns. The method used is 21. Actually one of claims 15 to 20, characterized in that potassium hydroxide is used as the alkali metal oxide. 22. The method according to any one of claims 15 to 21, characterized in that the proportion of the glycol ether in rteakUonsgeniisch is at least 40% by mass, preferably 50% by mass to 60% by mass. 23. The method according to any one of claims iS to 22, characterized in that approximately aquimular * parts of alkali metal hydroxide and carboxylic acid are used. «AT 400 242 B 24. The method according to any one of claims 15 to 23, characterized in that the reaction at a Temporalur between room temperature and όβ 'boiling temperature dos used filvkolethers. is preferably carried out at a temperature of 60 * C to 180 * C. 25. Method 2ur production of an additive according to one of claims 1 to 5, characterized in that an alkali metal component is prepared according to the method according to one of claims 1b to 24 and with a detergent and optionally with a corrosion protection and a uehazer, preferably in a TrSgeröt. is mixed in such a ratio that the additive produced contains 0.5% by mass to 1.5% by mass of alkali metal acetate. rO iS ff) m JS WO ftt)