LIQUID ALKALINE WASHING PREPARATION FOR METAL CLEANING Russian patent published in 2014 - IPC C11D1/00 C11D1/66 C11D1/72 C11D3/02 

FIELD: chemistry.

SUBSTANCE: invention relates to technological processes with the application of washing preparations, in particular in the metallurgical industry for cleaning of hard-rolled metal-roll in rolls on units of continuous processing from oils, rolling emulsols, lubricants, carbonaceous pollutions. Described is a liquid alkaline washing preparation, which contains sodium hydroxide, trisubstituted sodium phosphate, complexon (aqueous disodium salt of ethylenediaminetetraacetic acid or aqueous trisodium salt of hydroxyethylidendiphosphonic acid), a washing surface-active agent Berol DGR 81, additionally contains potassium hydroxide, a washing surface-active agent Berol LFG 61, a mixture of polyoxyethylated ethers of monoethanelamides of synthetic fatty acids of fraction C7-C17, propylene glycol and an antifoaming additive Biomol DF -63 with the following component ratio, g/l: sodium hydroxide 2.05-3.4, potassium hydroxide 1.5-2.5 sodium phosphate trisubstituted 0.08-0.13, aqueous complexon-disodium salt of ethylenediaminetetraacetic acid, aqueous or aqueous trisodium salt of hydroxyethylidendiphosphoric acid 0.16-0.28, washing surface-active agent Berol DGR 81 - optimised mixture of nonionic SAS of alcohol ethoxylates and alkylglucosides 0.12-0.2, washing surface-active agent Berol LFG 61 - optimised mixture of nonionic SAS of alcohol ethoxylates and alkylglucosides 0.58-0.97, mixture of polyoxyethylated ethers of monoethanolamides of synthetic fatty acids of fraction C7-C17 0.035-0.09, propylene glycol 0.21-0.36, antifoaming additive Biomol DF -63 0.17-0.29, water - the remaining part to 1 l, and the weight ratio of the mixture of the surface-active substances to propylene glycol and to the antifoaming additive constitutes : (4.3:1.24:1).

EFFECT: high washing ability both in the chemical and in electrochemical method of degreasing, low foaming.

2 tbl