FIELD: regeneration of used degreasing solutions in electrodeposition and chemical treatment of metal surfaces; applicable in metallurgical, metal working, mechanical engineering, automobile and car repair plants. SUBSTANCE: introduced into used degreasing solutions are reagents - cationic surfactants with hydrophylic-oelophylic ratio of 0.8-1.0 in the amount of 100-150 mg/l and contaminants are separated by floating. EFFECT: higher degree of purification of degreasing solutions without changing of their salt composition, and reduction of reagent consumption. 1 tbl
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