METHOD OF DETERMINING SUPERALKALINE ADDITIVE FOR LUBRICATION OILS Russian patent published in 2004 - IPC

Abstract RU 2241740 C1

FIELD: petrochemical processes.

SUBSTANCE: additive is prepared by interaction of (i) sulfured alkali metal alkylphenolate with alkaline number below that of prepared additive; diluting oil; C₁₂-C₂₆-carboxylic acid functioning as modifier in presence of catalyst; C₁-C₄-carboxylic acid alkali-earth metal salt; C₃-C₄-alkylene glycol; and alcohol containing at least 8 carbon atoms; and boric acid-modified Mannich base prepared by condensation of alkylphenol with ammonia and formaldehyde taken at weight ratio to sulfured alkylphenolate equal to (0.005-0.5):1 with (ii) alkali-earth metal hydroxide added to reaction mixture at 130-190^оС portionwise in the course of reaction after addition of each alkali-earth metal hydroxide portion.

EFFECT: increased hydrolytic and colloidal stability of additive.

1 tbl, 9 ex

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RU 2 241 740 C1

Authors

Zadko I.I.

Ermolaev M.V.

Borodina I.V.

Churzin A.N.

Dates

2004-12-10—Published

2003-06-24—Filed