METHOD FOR PRODUCTION OF COOLING LIQUID FOR INTERNAL COMBUSTION ENGINES ON THE BASE OF GLYCOL SOLUTION Russian patent published in 1997 - IPC

FIELD: chemical technology, production of cooling liquids intended for internal combustion engines and heat exchange devices operating at low and moderate temperature. SUBSTANCE: base anticorrosion component as 50 % aqueous solution of sodium salt of tolyl triazole is added into mixture of glycol with sodium nitrite and with sodium tetraborate to prepare inhibitor of corrosion. Sodium salt of 2-mercaptobenzothiazole is prepared separately by mixing of 2-mercaptobenzothiazole with aqueous solution of sodium hydroxide, thus synthesized product is added into mixture which comprises glycol and other components of inhibitor of corrosion. Then after mixing glycol with components of inhibitor of corrosion and with foam quenching agent to complete dissolution of components glycol solution is diluted with water. EFFECT: improved quality of desired product. 3 cl, 3 tbl