Chemistry of hydrocarbon compounds – Alicyclic compound synthesis – Polycyclic product
Patent
1991-04-19
1993-03-23
Pal, Asok
Chemistry of hydrocarbon compounds
Alicyclic compound synthesis
Polycyclic product
585510, 585530, 585533, 585366, C07C 250
Patent
active
051966212
ABSTRACT:
A process for the cyclodimerization of 1,3-butadienes to 4-vinylcyclohexenes comprising contacting a butadiene in the presence of a promoting amount of a hydroxylic solvent with a catalyst containing copper(I) ions supported on a carrier. A second process for the cyclodimerization of 1,3-butadienes to 4-vinylcyclohexenes comprising contacting a butadiene with a catalytic amount of a copper(I)-impregnated aluminosilicate zeolite characterized by a bulk SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio in the range from about 5 to about 50 and a framework SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least about 15. A catalyst composition comprising a copper(I)-impregnated zeolite of specified bulk and framework silica to alumina molar ratios and specified water content. The catalyst exhibits high activity and long lifetime in the aforementioned dimerization processes and is easily regenerated.
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Burdett Kenneth A.
Diesen Ronald W.
Dixit Ravi S.
King Stanley S. T.
Olken Michael M.
Achutamurthy P.
Pal Asok
The Dow Chemical Company
Zuckerman Marie F.
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