Quest International B.v.

Chi-Lam Tse

Paul Nicholas Davey

Christopher P Newman

William Alexander Thiam

A process for the preparation of carvone comprises hydrogenating carvoxime in the presence of a selecively poisoned catalyst. Preferred catalysts include noble metals supported on inorganic materials poisoned with a catalyst modifier. In a preferred embodiment of the process defined herein, the crude carvone reaction product produced in accordance with the process of the invention, is purified by treating the crude carvone product with an organometallic compound M(X) wherein M is a polyvalent metal, n is the valence of M and X denotes an inorganic or organic atom or group.

Preparation of carvone

Norlabdane oxide, which is a well known fragrance material having ambergris-type odors, is prepared from 12-acetoxy-norlabdane oxide by a hydrogenation reaction.

Growing community of inventors

Kent, United Kingdom

Chi-Lam Tse