Production of di-unsaturated carboxylic acids

Details Production of di-unsaturated carboxylic acids Production of di-unsaturated carboxylic acids

C - Chemistry, Metallurgy

07

C

260/520.1, 260/5

C07C 57/02 (2006.01) C07C 57/03 (2006.01) C07C 57/10 (2006.01) C07C 69/52 (2006.01)

Patent

CA 1077516

ABSTRACT OF THE DISCLOSURE The invention concerns dehydrogenation of carboxylic acids, lactones, esters, notriles, the carbon skeleton of the feed material being characterized as con- taining mono-unsaturation or alternatively functional groups such as hydroxyl which convert under process conditions to unsaturation, the dehydrogenation reaction being conducted in the presence of a contact catalyst comprising a carbon- aceous layer effective for the dehydrogenation of mono- unsaturated reactants to di-unsaturated products. Another aspect of the invention involves production of the mono- unsaturated reactants. In particular, the invention provides a route to sorbic acid, for example by dehydrogenation of hexenoic acids or esters thereof.

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