B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/7, 260/693.7
B01J 29/072 (2006.01) C07C 2/46 (2006.01) C07C 2/52 (2006.01) C07C 13/19 (2006.01)
Patent
CA 2147604
A process for the cyclodimerization of 1,3-butadienes to 4-vinylcyclohexenes. The process involves contacting a butadiene with a copper(I)-aluminosilicate zeolite prepared by (a) an impregnation method, or (b) heating a solid mixture of a copper salt and the zeolite, or (c) contacting vapors of a copper salt with the zeolite. The catalysts exhibit long life and good activity in the claimed process. The impregnated Cu(I)-catalyst is claimed. A second process for the cyclodimerization of 1,3-butadienes to 4-vinylcyclohexenes. The process involves contacting a butadiene with a catalyst containing copper(I) ions supported on a carrier in the presence of a hydroxylic solvent.
Burdett Kenneth A.
Diesen Ronald W.
Dixit Ravi S.
King Stanley S. T.
Olken Michael M.
Smart & Biggar
The Dow Chemical Company
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