DE2302873A1 - WASHING PROCEDURE - Google Patents

Description

Washing method

Subject of the main patent .... (patent application P 22 40 856.6) are detergents, dishwashing detergents and cleaning agents that act as builders all-cis-cyclopentane-1,2,3 »4-tetracarboxylic acid or its water-soluble Contain salts. In addition to these builders, the agents contain the usual constituents and additives, in particular surface-active substances Substances, such as color, odor and pH buffer substances, hydrotropic compounds and optical brighteners. These detergents have a good washing effect without the disadvantages of those containing polyphosphates To have detergents, in particular for water eutrophication.

In a further development of the invention on which the main patent is based, it has now been found that the washing liquors produced using the agents according to the main patent per liter of liquor and degree of German hardness at least 50 mg of the IPetra-sodium salt of the all-cis-cyclopentane-1,2,3 »4- tetraearboxylic acid or stoichiometrically corresponding amounts of other salts or of the free acid. The amounts of tetrasodium salt of all-cis-cyclopentane-1,2,3,4-tetracarboxylic acid are expediently above 80 mg per liter and dH. So the sets are eti
formation of the polyphosphates usual.

and dH. The quantities are therefore somewhat lower than those used

To use a detergent in the usual concentration of 4 to 6 g / l to be able to use hard water between 18 and Jo dH should the agent 15 to 40 # of the tetrasodium salt of all-cis-cyclopentane-1 »2,3,4-tetracarboxylic acid contain. The detergents or detergents can also contain other builders. In particular Neutral salts such as sodium sulphate and sodium chloride come into consideration here, which, for example, reduce those compared to polyphosphates Balance the amounts of complexing agents so that the same dosages are used when using the detergents as with detergents customary up to now possible are. Alkaline builders like soda, water glass

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and orthophosphates should only be present in minor amounts.

The "synthetic, detergent substances to be used in the process according to the invention are those customary in detergents. These include in particular the anion-active synthetic surfactants, for example the alkali salts of alkyl sulfates and alkyl sulfonic acids, which have alkyl radicals with about 8-22 carbon atoms, such as sodium dodecyl sulfate and sodium tetradecyl sulfonate; alkali metal salts of alkylbenzenesulfonic acids and alkylnaphthalene sulfonic acids with alkyl chains containing 8-22 carbon atoms, such as sodium dodecylbenzenesulfonate and disodium diisopropylnaphthalene disulfonate; alkali metal salts of alkyl ether sulfates and derived from alcohols with about 1 - 2o carbon atoms per mol. in particular contain about 6 moles of ethylene oxide, such as sodium lauryl hexaoxyethylene sulfate; alkali salts of alkylphenol ether sulfates with 1 - 10 ethylene oxide groups per molecule and alkyl groups of about 10 carbon atoms, such as sodium decylphenol hexaoxyethylene sulfate; also alkali salts of ^ '- Alkyloxyalkansulfonaten and £> -Acyloxyalkansulfpnaten as Matrium-2-äthoxyhexadecan-i-sulfonate and sodium 2-methoxyoctadecyl-sulfonate; Alkali succinamates; Alkali salts of the fatty acid amide of methyl tauride; Alkali salts of sulfonated mineral oils.

Furthermore, the detergent solutions or detergents according to the invention can contain nonionic detergent substances. These include in particular the ethylene oxide condensation products of alkylphenols with 6-12 carbon atoms in the alkyl group and 1o - 25 ethylene oxide groups per molecule or of aliphatic alcohols containing 8-18 carbon atoms with 1o - 3o moles of ethylene oxide per mole of alcohol, such as condensation products of nonylphenol with about 10 moles of ethylene oxide per mole of phenol or coconut alcohol with about 15 moles of ethylene oxide per mole of alcohol. Ethylene oxide condensation products with fatty acids, amides and amines and, in particular, with condensation products of propylene oxide with propylene glycol, which have a molecular weight of about 160, can also be used.

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Further suitable nonionic surfactants are oxides of tertiary amines with a long-chain alkyl radical of 8-18 carbon atoms and 2 short-chain alkyl radicals with 1-3 carbon atoms, such as dimethyldodecylamine oxide and also corresponding oxides of tertiary Phosphines and alkyl sulfoxides.

Furthermore, ampholytic "or zwitterionic surfactants for the detergents or detergents according to the invention are used. These are in particular secondary and tertiary amines or quaternary Ammonium salts containing at least one long-chain alkyl radical of 8-18 carbon atoms and at least one anionic, water-soluble making group, in particular a carboxylic or sulfonic acid group, e.g. 3-3) odecylaminopropionic acid or 3- (N, N-dimethyl-N-hexadecylammonio) -propane-1-sulfonate.

The washing liquors can contain various of the surfactants mentioned; A combination of an anionic detergent raw material with a nonionic one is particularly advantageous. The concentration of the Surfactants should be between 0.5 and 1.5 g / l in the washing liquor} accordingly, the detergent composition contains $ 10-25 of surfactants if they are used in amounts of 4-6 g / l target. Correspondingly higher amounts of detergent substances are necessary if only smaller amounts of detergent are used because, for example, the use of neutral salts is dispensed with became.

The washing liquors can also contain soap in minor amounts of up to about 0.5 g / l, corresponding to a maximum of 10% of the detergent composition contain. Require higher soap contents with a corresponding reduction in the amount of synthetic detergent substance a higher amount of tetrasodium salt of allcis-cyclopentane-1,2,3 »4-tetracarboxylic acid.

The washing liquors can also contain bleaching agents such as sodium perborate in amounts of 0.5-1.5 g / l, corresponding to 10-25 % of the detergent composition. Manganese silicate can be added to protect the fibers. An addition of carboxymethyl cellulose in amounts of 1 to 2 % to the detergent, corresponding to 0.05 to 0.1 g / l, has also proven successful

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Proven detergent solution. Finally, the rest of the others can Additives such as optical brighteners, foam regulators, fragrances, dyes are present in the washing liquors.

Example:

A heavy duty detergent with the following composition:

DodecyTbenzenesulfonate (biodegradable) 5.7 parts

Oxethylated tallow alcohol (Cg / C .. _p ) with 11 ÄO / mol 5.8 parts Tetranatriuin-all-cis-Cycln- ^ pntp.n.-i, 2,3,4-

tetracarboxylate 4 ° parts

Sodium sulfate 1o, 2 parts

Water glass, dry 4 parts

Sodium perborate 23 parts

Manganese silicate 1 part

Carboxymethyl cellulose 1.5 parts

Tetranäriumäthylendiamintetraacetat o, 2 parts

optical brighteners o, 25 parts

Sodium hydroxide 0.75 parts

was used to wash WFK test fabric in a drum washing machine. The filling ratio was 1:15 kg / l, the liquor ratio 1: 5.5 kg / l. Water of 15 dH was used and
60 g of detergent are used per kg of laundry. The prewash was carried out with heating from 2o to 5o C in 15 minutes, the clear wash
of 4 ° to 95 ⁰ C in 2o minutes; when rinsing was a 4 times
Water changes applied every 3 minutes.

The following were determined on the washed goods:

Ash (glow at 8oo ° C) Primary washing effect (DIH "44983 / 4.1.) Secondary washing effect (DIN 44983 / 4.3.) Bleaching intensity (DIN 44983 / 4.2.) Fifth treatment
Fifteenth treatment
Most vanished treatment

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ο, 6th ί 69 ο 2, ο 9, 9 BI 26, 0 BI 37, 6th BI

Claims (1)

23U2873 Claims 1. Method of washing with an all-cis-cyclopentane-1,2,3,4-tetracarboxylic acid containing agents according to patent ..... (P 22 4 ° 856.6), characterized in that the washing liquor more than 50 mg of the tetrasodium salt per liter and degree of German hardness the all-cis-cyclopentane-1,2,3> 4-tetracarboxylic acid or stoichiometrically corresponding amounts of other salts or the Contains free acid in addition to synthetic surfactants and possibly other customary Wasol ^ Ittel constituents. 2. The method according to claim 1, characterized in that the washing liquor per liter and degree of German hardness more than 80 mg of the tetrasodium salt of all-cis-cyclopentane-1,2,3 »4-tetracarboxylic acid or contains stoichiometrically corresponding amounts of other salts or the free acid. 5. The method according to any one of claims 1 or 2, characterized in that that the washing liquor as synthetic surfactants is anion-active washing-active substances, in particular alkali salts Alkyl aryl sulfonic acids, alkyl sulfonic acids and / or alkyl sulfates. contains. 4. Method according to one of Claims 1 and 2, characterized in that that the washing liquor as synthetic surfactants is nonionic detergent substances, in particular ethylene oxide condensation products with alkylphenols, aliphatic alcohols and / or propylene oxide-propylene glycol condensation products contains. 5. The method according to any one of claims 1 and 2, characterized in that that the washing liquor contains amphoteric or zwitterionic detergent substances as synthetic surfactants. 6. The method according to any one of claims 1-5 »characterized in that that the washing liquor contains a mixture of different synthetic surfactants. 409831/0920