Process for the preparation of conjugated dienes by dehydration

Details Process for the preparation of conjugated dienes by dehydration Process for the preparation of conjugated dienes by dehydration

1983-09-20

1985-10-15

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

Diolefin product

C07C 120

Patent

active

045476144

ABSTRACT:
An improved process for the preparation of conjugated dienes, particularly isoprene, from the corresponding aliphatic aldehyde using an acidic dehydration catalyst is disclosed. The present invention embraces the surprising discovery that catalyst activity and selectivity, particularly for boron phosphate catalyst, can be substantially prolonged by reducing the aldehyde liquid hourly space velocity to less than about 3.0 hr.sup.-1 and preferably to less than about 1.0 hr.sup.-1.

REFERENCES:
patent: 1033180 (1912-07-01), Kyriakides et al.
patent: 1033327 (1912-07-01), Kyriakides et al.
Bol'shakov et al., Prom-st. Sint. Kauch., 1980, (8), 2-4.

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