Preparation of alkenes and cycloalkenes

Details Preparation of alkenes and cycloalkenes Preparation of alkenes and cycloalkenes

1985-06-14

1986-02-11

Doll, John

Chemistry of hydrocarbon compounds

Adding hydrogen to unsaturated bond of hydrocarbon, i.e.,...

Hydrocarbon is contaminant in desired hydrocarbon

585277, 502208, C07C 503, C07C 505

Patent

active

045700257

ABSTRACT:
In one embodiment, an alkadiene and/or alkatriene is contacted with a free hydrogen containing gas in the presence of a catalyst composition comprising (a) palladium metal and (b) aluminum phosphate, so as to form primarily an alkene. In another embodiment, a cycloalkadiene and/or cycloalkatriene is contacted with a free hydrogen containing gas in the presence of a catalyst composition comprising (a) palladium metal and (b) aluminum phosphate, so as to form primarily a cycloalkene. The preferred cycloalkadiene is 1,5-cyclooctadiene, and the preferred cycloalkene is cyclooctene. Optionally, an alkali metal alkoxide, e.g. lithium methoxide, and/or carbon monoxide can be present during the hydrogenation reactions to improve the selectivity to alkenes and cycloalkenes, respectively.

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