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US 4,902,846 AGranted
Synlube process
AssigneeEthyl Corporation
InventorsThomas J. DiLeo, Matthew J. Lynch, Marshall B. Nelson, Ronny W. Lin
Life of this patent
Estimating the term…
Abstract
C.sub.8-14 .alpha.-olefins are oligomerized to a oligomer mixture containing a high content of tetramer by feeding the .alpha.-olefin to a reaction vessel at a controlled rate over an extended period and in the presence of BF.sub.3 and a promoter such as an alcohol.
Claims13
A one-step batch process for making an .alpha.-olefin oligomer, said process comprising:
- (A) placing an initial amount of 0-1.0 mole parts of a C.sub.8-14 .alpha.-olefin which is substantially free of promoted BF.sub.3 catalyst in a reaction vessel and
- (B) co-feeding at least 0.5 additional mole parts of said C.sub.8-14 .alpha.-olefin and a BF.sub.3 promoter to said reaction vessel over a period of at least one-half hour and under BF.sub.3 pressure while maintaining the reaction temperature at about 20.degree.-50.degree. C., said co-feeding being commenced at a time when said initial amount of C.sub.8-14 .alpha.-olefin, if any, is still at least 75 weight percent monomer.
A batch process for making a 1-decene oligomer containing at least 40 weight percent tetramer, said process comprising:
- (A) initially placing 0.1-1.0 mole parts of 1-decene which is substantially free of promoted BF.sub.3 catalyst in a reaction vessel, and
- (B) feeding (i) at least an additional 0.5 moles of 1-decene and (ii) a promoter amount of an alcohol to said reaction vessel over a period of at least 1 hour at a reaction temperature of about 25.degree.-40.degree. C. while maintaining said reaction vessel under BF.sub.3 pressure.
Dependencies are inferred from the claim text.