Claims
- 1. A process for converting at least one monoolefin to dimers, trimers and/or oligomers, which comprises contacting said monoolefin with a catalyst composition obtained by contacting, in any order, at least one bivalent nickel compound with at least one hydrocarbylaluminum halide of the formula AlR.sub.x X.sub.y wherein R is a monovalent hydrocarbon group, X is a chlorine or bromine atom, x has a value from 1 to 1.5 and y a value from 1.5 to 2, with x+y=3, and at least one organic Bronsted acid whose pK.sub.2 at 20.degree. C. is at most equal to 3.
- 2. A process according to claim 1, wherein the Bronsted acid is a halogeno carboxylic acid of the formula R.sub.1 COOH wherein R.sub.1 is a halogenoalkyl radical containing from 1 to 3 carbon atoms, complying with the formula C.sub.m H.sub.p X.sub.q wherein X is halogen, m=1, 2 or 3, p is zero or an integer and q is an integer, with the condition that p+q=2m+1.
- 3. A process according to claim 2, wherein the Bronsted acid is halogeno acetic acid of the formula R.sub.2 COOH where R.sub.2 is a halogenomethyl group of the formula CX.sub.n H.sub.3-n, X being halogen and n an integer from 1 to 3.
- 4. A process according to claim 3, wherein the Bronsted acid is trifluoroacetic, trichloracetic or tribomoacetic acid.
- 5. A process according to claim 1, wherein, in the formula of the hydrocarbylaluminum halide, x is 1, y is 2 and X is chlorine.
- 6. A process according to claim 1, wherein the nickel compound is a nickel carboxylate of the formula (R.sub.3 COO).sub.2 Ni where R.sub.3 is a hydrocarbyl radical having from 5 to 20 carbon atoms or where the two R.sub.3 radicals together form an alkylene radical having from 6 to 18 carbon atoms.
- 7. A process according to claim 1, wherein the molar ratio of the hydrocarbylaluminum halide to the nickel compound is from 1:1 to 50:1 and the molar ratio of the Bronsted acid to the hydrocarbylaluminum halide is from 0.001:1 to 1:1.
- 8. A process according to claim 1, wherein the molar ratio of the hydrocarbylaluminum halide to the nickel compound is from 2:1 to 20:1, the molar ratio of the Bronsted acid to the hydrocarbylaluminum halide is from 0.01:1 to 0.5:1 and the molar ratio of the Bronsted acid to the nickel compound is from 0.25:1 to 5:1.
- 9. A process according to claim 1, wherein the nickel compound has a solubility of at least 1 g/liter in n-heptane at 20.degree. C.
- 10. A process according to claim 1, wherein said hydrocarbylaluminum halide is ethylaluminum sesquichloride, dichloroethylaluminum, dichloroisobutylaluminum, or dibromoethylaluminum.
Priority Claims (1)
Number |
Date |
Country |
Kind |
78 35011 |
Dec 1978 |
FRX |
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Parent Case Info
This is a division of application Ser. No. 102,488, filed Dec. 11, 1979, now U.S. Pat. No. 4,283,305.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3542695 |
Dawans et al. |
Nov 1970 |
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3728283 |
Chauvin et al. |
Apr 1973 |
|
3928303 |
Yasui et al. |
Dec 1975 |
|
3937745 |
Wideman et al. |
Feb 1976 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
102488 |
Dec 1979 |
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