METHOD OF DEWAXING OF LUBE FRACTIONS Russian patent published in 1997 - IPC

Abstract RU 2099391 C1

FIELD: petroleum processing. SUBSTANCE: crystallization involving dewaxing of distillate lube fractions is carried out by way of their mixing with solvent, heat treatment, cooling mixture to filtration temperature, and separation of thus formed suspension on vacuum filter in presence of a surfactant, namely alkyldioxyethylenmethyl(methyl)diethylammonium benzenesulfonate, alkoxymethyldiethylammonium methylsulfate, alkyl(benzyl)dimethylammonium chloride, or 1,1-bis(polyethoxy)-2- imidazolinium acetate in quantity 0.001-0.05% based on raw material weight. When optimum amount of surfactant and dewaxing conditions are observed, viscosity index of dewaxed oil is increased by 13-20 units and filtration rate of suspension of solid hydrocarbons on oil solution increased by 5.5 to 129.1%. EFFECT: improved performance characteristics of oil. 1 tbl

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RU 2 099 391 C1

Authors

Rjabov V.G.

Shuverov V.M.

Kuz'Min V.I.

Junusov Sh.M.

Starkova N.N.

Sheina N.V.

Dates

1997-12-20—Published

1996-07-31—Filed