TWO-STEP PROCESS FOR PROPANE DEASPHALTING OF VACUUM RESIDUES Russian patent published in 2004 - IPC

Abstract RU 2235110 C1

FIELD: petroleum processing.

SUBSTANCE: residual motor oils are obtained from vacuum residues using two-step propane deasphalting process wherein, before second deasphalting step, spent motor oil is added to asphalt phase.

EFFECT: increased yield of residual motor oils.

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RU 2 235 110 C1

Authors

Nigmatullin V.R.

Nigmatullin I.R.

Nigmatullin R.G.

Zolotarev P.A.

Dates

2004-08-27—Published

2002-11-29—Filed