Process for the preparation of cyclohexane-1,3-dione from .delta

Details Process for the preparation of cyclohexane-1,3-dione from .delta Process for the preparation of cyclohexane-1,3-dione from .delta

1982-04-21

1983-10-11

Evans, J. E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

502 38, 502 51, C07C 4554

Patent

active

044094000

ABSTRACT:
Cyclohexane-1,3-diones are prepared by passing .delta.-ketocarboxylic acid esters in the gaseous phase over a temperature of from 250.degree. C. to 500.degree. C. at a catalyst. The catalyst contains at least one element of groups III B or IV B of the Periodic System in the form of a compound. Particularly preferred catalysts are thorium compounds on charcoal carriers.

REFERENCES:
patent: 3932511 (1976-01-01), Schaafsma et al.
patent: 4041049 (1977-08-01), Muller et al.
patent: 4154965 (1979-05-01), Meijer et al.

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