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US 4,225,739 AGranted
Process for improving olefin polymer oil properties
AssigneeMobil Oil Corporation
InventorsRichard N. Nipe, John W. Schick, Robert M. Gemmill, Jr.
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Abstract
Polymer oils having reduced viscosity and increased viscosity index are produced by oligomerizing a mixture of short chain 1-olefins and long chain 1-olefins in the presence of water or alcohol promoted boron trifluoride catalyst and low-boiling recycle from a previous oligomerization run.
Claims4
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.
Dependencies are inferred from the claim text.