Modified crystalline aluminosilicate zeolite catalyst and its use in the production of lubes of high viscosity index
First Claim
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1. A process for the production of high viscosity index lubricating oils in high yields from lower olefin, said process comprising the steps of:
- (i) contacting said olefin with a modified crystalline aluminosilicate zeolite catalyst under conditions sufficient to provide a product comprising a lubricating oil; and
(ii) recovering said lubricating oil, said modified crystalline aluminosilicate zeolite being prepared by contacting aluminosilicate zeolite with aqueous fluorosilicate salt to extract external zeolitic aluminum therefrom, without affecting the internal structure of the zeolite, said zeolite being selected from the group consisting of ZSM=5, ZSM-11, ZSM-12, ZSM-22, ZSM-23, ZSM-35, ZSM-38 and ZSM-48.
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Abstract
The catalytic activity of a crystalline aluminosilicate zeolite having a Constraint Index of from about 1 to about 12 for a variety of hydrocarbon conversions including the oligomerization of olefins to provide high viscosity index lubes is significantly enhanced by modifying the catalyst to reduce surface acid sites. This is accomplished by contacting the zeolite with a fluorosilicate salt to extract surface zeolitic aluminum which is replaced by silicon.
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13 Claims
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1. A process for the production of high viscosity index lubricating oils in high yields from lower olefin, said process comprising the steps of:
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(i) contacting said olefin with a modified crystalline aluminosilicate zeolite catalyst under conditions sufficient to provide a product comprising a lubricating oil; and (ii) recovering said lubricating oil, said modified crystalline aluminosilicate zeolite being prepared by contacting aluminosilicate zeolite with aqueous fluorosilicate salt to extract external zeolitic aluminum therefrom, without affecting the internal structure of the zeolite, said zeolite being selected from the group consisting of ZSM=5, ZSM-11, ZSM-12, ZSM-22, ZSM-23, ZSM-35, ZSM-38 and ZSM-48. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification