Method of producing .beta.-isophorone by the isomerization of .a

Details Method of producing .beta.-isophorone by the isomerization of .a Method of producing .beta.-isophorone by the isomerization of .a

1997-09-26

1999-05-25

Geist, Gary

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

Organic compounds

Oxygen containing

568342, 568366, C07C 4567

Patent

active

059070650

ABSTRACT:
A method of producing 3,5,5-trimethylcyclohexa-3-ene-1-one (.beta.-isophorone) by isomerization of 3,5,5-trimethylcyclohexa-2-ene-1-one (.alpha.-isophorone) in a liquid phase in the presence of a homogeneous or heterogeneous catalyst in which a mixture with a relatively low concentration of .beta.-isophorone is drawn off from the reaction container and the .beta.-isophorone isolated by vacuum distillation. .beta.-isophorone is an important synthetic structural element for the production of carotinoids, vitamins and pharmaceutical products.

REFERENCES:
patent: 4845303 (1989-07-01), Bellut et al.
patent: 5276197 (1994-01-01), Nosberger et al.

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