METHOD FOR DEPARAFFINATION OF PARAFFINACEOUS OIL FRACTIONS Russian patent published in 2003 - IPC

Abstract RU 2214443 C1

FIELD: petroleum processing. SUBSTANCE: paraffinaceous fraction is mixed with methyl tert-butyl ether-based selective solvent containing ion-forming additive. Mixture is cooled and filtered, after which dewaxed oil and petrolatum are obtained. Ion-forming additive is preferably compound selected from NaCl, NaOH, Na₂CO₃, Na₂SO₄, KCl, KOH, FeCl₃, FeSO₄, CuSO₄, or their mixture in the form of aqueous solution taken in amounts 0.1 to 3% based on the volume of solvent. EFFECT: increased yield of dewaxed oil with improved viscosity index and increased filtration velocity. 6 cl, 6 tbl, 5 ex

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RU 2 214 443 C1

Authors

Nigmatullin I.R.

Nigmatullin V.R.

Ol'Kov P.L.

Dates

2003-10-20—Published

2002-02-08—Filed