DE1302882B - Process to supplement cleaning baths for the continuous cleaning of rigid material - Google Patents

Description

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It is known to clean rigid material that is provides. These are available under the trade names PLURO-

such as workpieces made of metal or glass, in particular NIC L 61, L 62 and L 81 as well as TETRONIC 701 im

however, for cleaning bottles, alkaline cleaners are available from retailers.

To use agents that are orthophosphates such wetting or antifoam agents

keep. Furthermore, such agents often contain caustic agents, expediently together with solubilizers,

Soda, soda, condensed phosphates, such as pyro-, meta- we especially lower aliphatic alcohols

and polyphosphates, wetting agents and optionally having 1 to 5 carbon atoms are used. The amount

Antifoam and disinfectant. Generally on solubilizers in the active ingredient concentrates

These products are available as powdery mixtures in the can fluctuate to a considerable extent and lies

Brought to trade and in this form the cleaning io preferably between 10 and 60 percent by weight,

bath supplied discontinuously, the Badkon- based on the total concentrate. The proportion of

concentration of the cleaning agent depending on the application phosphoric acid is 10 to 35 percent by weight,

purpose and degree of pollution between 0.2 and 2%, preferably 20 to 70 percent by weight, while

lies. Complexing agents in amounts of 3 to 15, preferably

Alkaline orthophosphates 15 5 to 12 percent by weight have also been used,

containing detergent concentrates used. Antifoam agents and wetting agents are in the

However, these have the disadvantage that in highly concentrated active ingredient concentrates in amounts of 0.5 to 8

trated solutions the orthophosphates slightly by weight percent, preferably 2 to 5 percent by weight,

crystallize and contain losses during prolonged storage. The rest of the active ingredient concentrate consists

the polymer phosphates 20, which are almost always used, each from water,

occur as a result of hydrolysis. In addition to the active agent, the cleaning baths

It has now been found that these shortcomings continue to be essentially concentrated with a substance concentrate

Can largely be avoided if one supplements the agents containing sodium hydroxide solution, whereby

the procedure described above. The new latter is in excess. Under the term

Process for supplementing cleaning baths for "excess" is intended for the purposes of the present invention

understood the continuous cleaning of rigid material, such a large amount of caustic soda

especially bottles containing trisodium orthophosphate, which is sufficient to not only contain the phosphate

containing alkaline cleaning agents, active ingredient concentrate containing phosphoric acid should be

characterized in that the cleaning bath supplements neutralize, but rather the mixture of the two com-

with 30 components, a pH of above 11 is preferred

. . ,,, ■, ",,. . · Above 12, to give. Appropriately this is

a) an acidic active ingredient _{concentrate, which contains free agents essentially} containing sodium hydroxide, phosphoric acid and, as a complex-forming agent, glucon- _{fa]] sk in the form of a concentrate} , the acidic and / or hydroxyalkyldiphosphonic acid _{water content} preferably being below 70%.

or Aminoalkyldiphosphonsauren or its _{35 furthermore it IGT also mögüch} ^ _{Tei, def Kom.}

Contains water-soluble salts, as well as plexing agents or wetting or antifoaming agents

b) to add a sodium hydroxide solution essentially containing sodium hydroxide solution. In general, however Medium, the latter being in excess. the addition of these agents to the phosphoric acid

containing active ingredient concentrate takes precedence

In order to achieve a good cleaning effect, it is given 40, as there are other advantages in this way, among other things

expedient that the active ingredient concentrate is possible in addition to two particularly highly concentrated solutions

Phosphoric acid complexing agents as well as wetting and / or gene to be used.

Contains solubilizer. It has proven to be The amounts of active ingredient concentrate with which the

It has been proven that they are supplemented as complexing agents instead of the usual baths, depend on the

Polymer phosphates, gluconic acid and / or hydroxyl water hardness 45 and the respective items to be cleaned. she

alkyldiphosphonic acids or Aminoalkyldiphosphon- are generally dimensioned so that in the pure

acids or the water-soluble salts of this phosphonation bath have a concentration of 0.1 to 0.5%,

acids to use. This comes as a diphosphon- The amount of concentrate with the liquid active ingredient

acids in particular compounds of the general alkaline agent to be used at the same time is in the

Formula 5 ° generally between 0.5 and 3%, preferably 1 and

ORO 2%. based on the final bath concentration.

π ι The means described above are used in the

ρ ■ usual temperatures used. These amount to

. j for example with automatic bottle washers

I 55 machines 60 to 8O ⁰ C. Even when cleaning other

HO X OH ren rigid materials such as metals, the cleaning temperature is generally above 50 ° C.
into consideration, where X = OH or NH ₂ and R one

preferably aliphatic hydrocarbon radical with example 1
Means 1 to 8 carbon atoms. 60

As a wetting agent, especially for the non-ionic compounds in machine (Holstein & Kappert plant) with two alkaline solutions, It is preferred to use those with zones and an hourly output of 16,000 bottles At the same time, a pronounced anti-foam effect, beer bottles were cleaned. The used possession. Substances of this type are preferably 65. Tap water had a temporary hardness of about 10 ° Condensates of ethylene oxide with a hydrophobic d. H. The cleaning solution in the lye component, by condensing propylene zones 1 and 2, each a solution with 1% sodium hydroxide solution oxide prepared with propylene glycol or ethylene diamine. This solution was made by adding a

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another 0.2% solution of the following composition- 30% 75% phosphoric acid

Settlement supplements: 20% 50% gluconic acid

30 ° / 75% HPO 10 ° / ₀ 60% hydroxyethane diphosphonic acid

20 _«0 ° 50% gluconic acid ⁴ ° / o nonionic wetting agent (condensate 4% nonionic wetting agent (condensation of ethylene oxide with ⁵ sationsprodukt

cation product of ethylene oxide with a reaction product of ethylene

Polypropylene glycol, available under the ^dl ™ ^m _A, and propylene dioxide are available

Trade name PLURONIC L 61), _{£ 0 /} under the trade name TETRONIC 701)

46% ethyl alcohol ³⁶ / »isopropanol

_. _,,. ... . . - ^. ¹⁰ The well water used in this operation

The bottles were perfectly cleaned. It _{had a temporary hardness of approx} . 30 _{d H under}

Labels were peeled off well Eme stiffening was _{these conditions} bottle cleaning was very good

Cannot be determined in the hot water zone. Eme satisfactory

Foam development was during the 3 days

Time of use of the soft liquor not determined. 15 Example5

In a small automatic bottle washer

Example 2 machine with an hourly output of 4000 bottles

were at a temperature of 70 ° C wine bottles

In a commercial bottle washing machine with _m j _t a l, 5 weight ° / o aqueous sodium hydroxide solution and a 0.2 ° / ₀

With an hourly output of 10,000 bottles, 20 supplementary solutions of the composition were made
Mineral water bottles cleaned. The cleaning bath .... ,, ...,,

was with a 1.5% alkaline solution, the 30% 75% phosphoric acid

95 parts of NaOH and 5 parts of Na ₂ SiO ₃ , made up. ² J ° » ⁵⁰ ° / ^ ⁶ gluconic acid

This solution was made by adding a further ⁴ % non-ionic wetting agent (condensation

0.2% solution of a liquid cleaning _{agent 25} cation product of Athy enoxid mt

supplements, the 30% 75% phosphoric acid, 10%! ° ^lyl £ ^Op ? f ^glycol> £ ? ™ ^ n τ \ π

50% gluconic acid, 4% non-ionic wetting agent ^ m trade name PLURONIC L 61)

(Condensation product of ethylene oxide with poly ?) '· » ^Water

propylene glycol, available under the trade name ^lf) / 0 isopropanol

PLURONIC L 81) and 56% ethyl alcohol. 30 cleaned. The cleaning effect was also

The process water used in this operation is very dirty in the red wine bottles

had a temporary hardness of about 5 ° d. H. The good. A fossilization in the hot water zone as well

The temperature of the cleaning solution was between 70. Foam formation in the caustic zone could

and 75 ° C. The cleaning of the mineral water bottles rend the several days of use of the cleaning

was good. A steady filling could not be observed.

will.

Example 6

In an automatic bottle washer,

In a 2-chamber washing system, bottles with a faulty color imprint on dirty engine parts were cleaned with 1.25% sodium hydroxide removal using a 2% sodium hydroxide solution. This alkaline basic solution was supplemented with a 0.4% supplementary solution for prevention with a 0.2% solution of the following to the petrification of the warm water zone as well as for the composition: to improve the cleaning effect. The Er-30% 75% phosphoric acid supplement solution consisted of
20% 50% gluconic acid ⁴⁵ 40% 75% phosphoric acid
4% non-ionic wetting agent (condensate 15% 50% gluconic acid

cation product of ethylene oxide with 10% 60% hydroxyethane diphosphonic acid

a reaction product of ethylene- 4% non-ionic wetting agent (condensate

diamine and propylene oxide, available with sation product of ethylene oxide

under the trade name TETRONIC 701) ⁵ ° polypropylene glycol, available at

33% water under the trade name PLURONIC L 61)

13% ethyl alcohol 31% ethyl alcohol

In this way, the repair parts could be used. The service water used was temporary

a temperature of 8O ⁰ C in the spraying process good 55 hardness of 17 ° d. H. Despite this high hardness it could be cleaned. in an attempt lasting several months the

Hot water zone must be kept free of stones.

Example4 Practically the same result can be obtained,

if the above supplementary solution is replaced by a

In a bottle washer with three 60 dipping solution of the following composition is replaced by: zones (Baele plant) were lemonade bottles overall 40% 75 ° _o l phosphoric acid

cleans. For the various immersion baths this 15% 50% gluconic acid

Machine was a 2.5% sodium hydroxide solution 5% aminoethane diphosphonic acid

used. To increase the washing effect as well as 4% non-ionic wetting agent (condensation

to avoid fossilization in the warming 65 product of ethylene oxide with

The baths were further made with a polypropylene glycol, available under water zone

0.1% supplementary solution of the following joint- the trade name PLURONIC L 61)

Composition loaded: remainder ethyl alcohol

Claims (2)

Patent claims: 1. Process for supplementing cleaning baths for the continuous cleaning of Rigid material, especially bottles, with alkaline trisodium orthophosphate Cleaning agents, characterized that the cleaning bath is supplemented with a) an acidic active ingredient concentrate, which contains free phosphoric acid and as a complexing agent Gluconic acid and / or hydroxyalkyldiphosphonic acids or aminoalkyldiphosphonic acids or contains their water-soluble salts, as well as b) an agent containing essentially sodium hydroxide, the latter being in excess. 2. The method according to claim 1, characterized in that the acidic active ingredient concentrate furthermore contains wetting agents and / or antifoam agents and optionally solubilizers.