METHOD OF PREPARING HIGH-ALKALINE LUBRICATING OIL ALKYLPHENOL ADDITIVES Russian patent published in 2004 - IPC

Abstract RU 2238303 C1

FIELD: petroleum processing and petrochemistry.

SUBSTANCE: additive is prepared by reaction, at temperature 100-200^оС, of C₈-C₂₀-alkylphenol with elementary sulfur and calcium oxide in presence of C₂-C₄-alkylene glycol, sulfate stabilizer, and boric acid-modified Mannich base prepared by condensation of alkylphenols with ammonia and formaldehyde at molar ratio of alkylphenol to modified Mannich base 1:(0.01-0.3), after which intermediate product is treated with carbon dioxide. Above-mentioned sulfonate stabilizer is neutral or moderately alkaline calcium sulfonate or sulfurized calcium C₈-C₂₀-alkylphenolate.

EFFECT: increased colloidal and thermal stability of additive and improved detergent and antioxidant properties.

2 cl, 2 tbl, 11 ex

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RU 2 238 303 C1

Authors

Zadko I.I.

Ermolaev M.V.

Vipper A.B.

Borodina I.V.

Olejnik Zh.Ja.

Dates

2004-10-20—Published

2003-04-11—Filed