Method of producing low-pour high-VI lubes by co-processing solvent dewaxing

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EP 0 471 461 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	18.03.1992 Bulletin 1992/12

(43)	Date of publication A2:
	19.02.1992 Bulletin 1992/08

(21)	Application number: 91306827.6

(22)	Date of filing: 29.07.1991

(51)	International Patent Classification (IPC)⁵: C10M 101/02, C10G 73/06

(84)	Designated Contracting States:
	DE FR GB IT

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Priority:

30.07.1990 US 559779

(71)	Applicant: EXXON RESEARCH AND ENGINEERING COMPANY
	Florham Park, New Jersey 07932-0390 (US)

(72)	Inventors:
	Bell, James David Toronto, Ontario, M5N 1X6 (CA) Ewener, Patrick Charles Sarnia, Ontario, N7V 2N1 (CA)

(74)	Representative: Somers, Harold Arnold et al
	ESSO Engineering (Europe) Ltd. Patents & Licences Mailpoint 72 Esso House Ermyn Way Leatherhead, Surrey KT22 8XE Leatherhead, Surrey KT22 8XE (GB)

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References cited: :

(54)	Method of producing low-pour high-VI lubes by co-processing solvent dewaxing

(57) High boiling high VI (viscosity index) wax isomerates and natural waxy oil distillates can be solvent dewaxed to low pour point under miscible conditions by combining said high boiling high VI stocks with from 5 to 50 LV% of a lower boiling conventional VI waxy lube oil and coprocessing the mixture under conventional solvent dewaxing conditions. The resultant low pour mixture can subsequently be fractionated into high yields of the high boiling high VI component and of the lower boiling, conventional VI component, both components exhibiting low pour points.

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