Quest International B.v.

William Alexander Thiam

Christopher P Newman

Paul Nicholas Davey

Chi-Lam Tse

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.

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Kent, United Kingdom

William Alexander Thiam