Catalytic systems for ethylene dimerization to 1-butene

Details Catalytic systems for ethylene dimerization to 1-butene Catalytic systems for ethylene dimerization to 1-butene

C - Chemistry, Metallurgy

07

C

252/93.B, 260/70

C07C 2/08 (2006.01) C07C 2/32 (2006.01) C08F 4/602 (2006.01)

Patent

CA 1298829

ABSTRACT OF THE DISCLOSURE A method of producing 1-butene by dimerization of ethylene in the presence of a catalyst, said catalyst being a mixture of a) an organometallic compound of the formula: Image wherein A is alkoxy or aryloxy group; acac is the 2,4-pentadionato anion of the formula (CH3COCHCOCH3)-; B is A or acac, or a bidentate ligand; m is 0, 1, 2 or 3; n is 0, 1 or 2; and M is titanium, zirconium or niobium; b) an alkylaluminum compound of the formula: AlRxXyZz wherein x, y and z each is 0, 1, 2 or 3; R is an alkyl group containing from one to six carbon atoms; X is R or H; and Z is R or halogen or alkoxy group -OR. A preferred catalyst is Ti(n-OBu)2(acac)2 - n Al(C2H5)3 wherein n is from 1 to 15, preferably from 2 to 6.

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