Claims
- 1. In a process for oligomerizing a short chain 1-olefin and a long chain 1-olefin having between 14 and 20 carbon atoms in the presence of boron trifluoride promoted by a minor amount of alcohol or water, at a temperature between about 0.degree. C. and about 60.degree. C.; the improvement in reducing viscosity and increasing the viscosity index of finished oil that results from the incorporation of a small amount of recycle using a weight ratio of short chain 1-olefin/long chain 1-olefin/recycle of 0.9-1/1/0.1-0.2; said recycle having a boiling range between about 50.degree. C. and about 122.degree. C. at 1.0 mm mercury pressure.
- 2. The process of claim 1, wherein said short chain 1-olefin is propylene and said long chain 1-olefin is a mixture of 1-olefins having 15 to 18 carbon atoms.
- 3. The process of claim 2, wherein the temperature is between about 10.degree. C. and about 50.degree. C.
- 4. The process of claim 2, wherein the amount of promoter is between about 0.1 percent and about 1.0 percent by weight of the charge.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of copending application Ser. No. 848,968, filed Nov. 7, 1977, and now abandoned.
US Referenced Citations (3)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
848968 |
Nov 1977 |
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