| 摘要 |
A process for preparing a catalyst which comprises contacting a polynuclear transition metal carbonyl complex having the general formula An(MM'(CO)qLm)<->nWHEREIN A is a cation selected from the group consisting of alkali metals and cations having the general formula D4Q wherein D is selected from a group consisting of C1-C20 hydrocarbyl radicals and halogenated derivatives thereof and Q is selected from the group consisting of nitrogen, phosphorus and arsenic; M is a Group VI-B metal; M' is a metal selected from the group consisting of Group VI-B and Group VII transition metals; L is a unidentate or bidentate ligand selected from the group consisting of CO, NH3, hydrazine, phenylhydrazine, cyclohexylamine, n-butylamine, dimethylamine, aniline, diethylamine, pyridine, 2,6-dimethylpyridine, triphenylarsine, tributylstibine, triphenylstibine, dimethylsulfoxide, dimethylcyanamide, N-cyanopiperidine, triphenylphosphine imine, ethylenediamine, tetramethylethylenediamine 2,2'-dipyridyl, 1,10-phenanthroline, 2,7-dimethyl-1,8-naphthyridine, piperidine, piperazine, acetonitrile, propionitrile, acrylonitrile, triphenylphosphine, triphenylphosphine oxide, triphenyl phosphite, tricyclohexylphosphine triphenylarsine, tri(p-tolyl)arsine, tetramethyldiphosphine, 1,2-bis(diphenylphosphino) ethane, 1,2-bis(diphenylarsino)ethane, O-phenylene bis(dimethylarsine), diethylenetriamine, bis(2-methoxyethyl)ether, 2,5,8-trithianonane, tris(diphenylphosphinomethyl)ethane, and tetrakis(diphenylphosphinomethyl)methane; q is an integer of from 0 to 14; m is an integer varying from 0 to 2, and wherein L must be CO when q is equal to 0; n is an integer of from 1 to 2 and equal to the valence of the carbonyl anion; with an ionic compound of the type RX wherein X is a halide and R is selected from the group consisting of compounds having the general formula D4Q wherein D is selected from the group consisting of C1-C20 hydrocarbyl radicals and halogenated derivatives thereof and Q is nitrogen, phosphorus or arsenic, and an organometallic activator, said organometallic activator comprising organoaluminum halides selected from the group consisting of compounds having the general formulas R'AL2 and R'3AL2Y3 wherein R' is selected from the group consisting of hydrogen and C1-C20 hydrocarbyl radicals and C1-C20 oxyhydrocarbyls and wherein at least one R' is a hydrocarbyl radical, and Y is a halide, said contacting taking place at a temperature from -35 to 100 DEG C and a pressure of from about 0.01 atmospheres to 500 atmospheres, the atomic ratio of the metal of the organometallic activator to the Group VI-B metal of the metallic complex varying from about 20:1 to 1:1 and the molar ratio of the Group VI-B metal to said ionic compound varying from 10:1 and 0.1:1, whereby a catalyst is formed. Catalysts prepared by the above process are especially effective as olefin disproportionation catalysts.
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