Claims
- 1. A process for producing a hydrocarbon oil comprising contacting an internal olefin having the formula
- R--CH.dbd.CH--R'
- wherein R and R' which can be the same or different each represent an alkyl radical of 4-12 carbon atoms,
- under dimerization conditions with alcohol-promoted boron halide as a dimerization catalyst to produce a mixture comprising said hydrocarbon oil.
- 2. A process in accordance with claim 1 wherein
- (a) at least one alpha olefin having the formula
- R"--CH.dbd.CH.sub.2
- wherein R" has the same meaning as R and R', is contacted under disproportionation conditions with a disproportionation catalyst to produce a first product comprising unreacted alpha olefins and said internal olefin,
- (b) said internal olefin and said unreacted alpha olefin are separated to form a second product comprising said internal olefin but being essentially free of unreacted alpha olefin,
- (c) said second product is contacted with said dimerization catalyst.
- 3. A process in accordance with claim 2 wherein said disproportionation catalyst is an oxide of rhenium catalyst.
- 4. A process in accordance with claim 2 wherein said alpha olefin is one having 8, 9 or 10 carbon atoms.
- 5. A process in accordance with claim 2 wherein step (b) is carried out by heating said first product in a heating zone to a temperature between the boiling point of said alpha olefin and the boiling point of said internal olefin to evaporate said unreacted alpha olefin and by withdrawing a stream containing alpha olefin vapors from said heating zone, both boiling points referring to that temperature at which the specified hydrocarbon boils at the operating pressure.
- 6. A process in accordance with claim 5 wherein at least a portion of said alpha olefin vapors is recycled to said disproportionation reaction in step (a).
- 7. A process in accordance with claim 1 comprising
- (a) removing said dimerization catalyst from said mixture to produce a hydrocarbon fluid,
- (b) subjecting said hydrocarbon fluid to a distillation to remove unreacted internal olefin from said hydrocarbon fluid leaving a hydrocarbon liquid,
- (c) subjecting said hydrocarbon liquid to a distillation at a temperature above the boiling point of the dimer of said internal olefin under the given pressure of the vacuum distillation to produce a purified hydrocarbon oil.
- 8. A process in accordance with claim 7 where said hydrocarbon oil prior to or after said vacuum distillation step (c) is contacted under hydrogenation conditions with molecular hydrogen and a hydrogenation catalyst such as to remove essentially all of the olefinic unsaturation from the hydrocarbon oil.
- 9. A process in accordance with claim 2 wherein ethylene formed during the reaction of step (a) is continuously removed from a reaction zone in which the disproportionation reaction of step (a) is carried out.
- 10. A process in accordance with claim 1 wherein said dimerization catalyst comprises alcohol-promoted boron trifluoride.
- 11. A process in accordance with claim 2 wherein said at least one alpha olefin is a normal alpha olefin.
Parent Case Info
This application is a continuation-in-part of Ser. No. 132,560, filed Mar. 21, 1980, now U.S. Pat No. 4,319,064.
US Referenced Citations (14)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1497524 |
Jan 1978 |
GBX |
Continuation in Parts (1)
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Number |
Date |
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Parent |
132560 |
Mar 1980 |
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