High viscosity index lubricants

Details High viscosity index lubricants High viscosity index lubricants

1989-07-17

1990-12-04

McFarlane, Anthony

Mineral oils: processes and products

Paraffin wax; treatment or recovery

Chemical treatment

208 18, 208 49, 208 58, 208 59, 208 96, 208 97, 585739, C10G 6512

Patent

active

049751778

ABSTRACT:
Lubricant basestocks of high viscosity index, typically with V.I. of at least 130 or higher, and low pour point, typically below 5.degree. F., are produced by hydroisomerizing petroleum waxes such as slack wax or de-oiled wax, over zeolite beta and then dewaxing to target pour point. A preferred process employs a solvent dewaxing after the hydroisomerization step to effect a partial dewaxing with the separated waxes being recycled to the hydroisomerization step; dewaxing is then completed catalytically, typically over ZSM-5 or ZSM-23.

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"Lube Oil Manufacture by Severe Hydrotreatment", S. Bull et al, pp. 221-PD 19(2).

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