METHOD FOR PRODUCTION OF HIGH-INDEX AND WAXY EXTRACT Russian patent published in 2003 - IPC

Abstract RU 2198201 C2

FIELD: petroleum processing. SUBSTANCE: lube fractions are deparaffinated according to integrated three-step filtration, third-step filtrate being withdrawn in the form of a separate stream and second-step filtrate returned into the beginning of process. Deparaffinated oil is subjected to extraction by N- methylpyrrolidone. Process gives oils with pour point below -15 C and waxy extract with pour point below -25 C. EFFECT: increased yield of oils with viscosity index above 100 and enabled production of waxy extract. 10 tbl, 5 ex

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RU 2 198 201 C2

Authors

Sajfullin N.R.

Kalimullin M.M.

Nigmatullin R.G.

Zolotarev P.A.

Nigmatullin V.R.

Dates

2003-02-10—Published

1997-07-03—Filed