Process for the hydroisomerization of Fischer-Tropsch wax to produce lubricating oil

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EP 0 323 092 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	30.08.1989 Bulletin 1989/35

(43)	Date of publication A2:
	05.07.1989 Bulletin 1989/27

(21)	Application number: 88311982.8

(22)	Date of filing: 16.12.1988

(51)	International Patent Classification (IPC)⁴: C10G 45/62, C10G 65/04

(84)	Designated Contracting States:
	DE FR GB IT NL

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Priority:

18.12.1987 US 134797

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

(72)	Inventors:
	Boucher, Heather Alexis Ontario N7T 7W4 (CA) Hamner,Glen Porter Deceased (US) Wachter, William Augusta Baton Rouge Louisiana 70817 (US)

(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)	Process for the hydroisomerization of Fischer-Tropsch wax to produce lubricating oil

(57) Fischer-Tropsch wax is converted to a lubricating oil having a high viscosity index and a low pour point by first hydrotreating (R-1) the wax under relatively severe conditions and thereafter hydroisomerizing (R-2) the hydrotreated wax in the presence of hydrogen on a specified type of fluorided Group VIII metal-on-alumina catalyst. The hydroisomerate is then dewaxed (D-1) to produced a premium lubricating oil base stock.
The preferred hydroisomerization catalyst is a fluorided platinum-on-alumina catalyst containing relatively low surface fluoride, a high concentration of aluminum fluoride hydroxide hydrate and a low nitrogen concentration.

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