FIELD: chemical industry. SUBSTANCE: alkylsalicylate additives to lubricating oils are prepared by reacting alkyl-C14-C18-salicylic acids with potassium hydroxide and carbon dioxide at 80-140 C and at a residual pressure of 0,01-1 kg/cm2 in the presence of a promoter. The promoter is ethylene glycol or methyl(ethyl)cellusolve in an amount of 10-20 wt % per the reaction mixture. Potassium hydroxide may be used in an amount by 1.3-1.5 times exceeding the stoichiometric amount. EFFECT: improved properties of the additive. 2 cl, 1 tbl
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Authors
Dates
1994-09-15—Published
1992-07-13—Filed