Process for manufacture of pentaerythritol diphosphites

Details Process for manufacture of pentaerythritol diphosphites Process for manufacture of pentaerythritol diphosphites

C - Chemistry, Metallurgy

07

F

C07F 9/6578 (2006.01)

Patent

CA 2548088

A method is disclosed for the production of pentaerythritol diphosphites of high spiro isomer content. The pentaerythritol diphosphites are produced via sequential transesterification of pentaerythritol with a monophosphite followed by a substituted phenol or other alcohol, wherein the transesterification reactions are carried out under controlled conditions of temperature and pressure. The unique reaction conditions result in intermediate and final pentaerythritol diphosphites of high spiro isomer content and high total yield of the diphosphites.

L'invention concerne un procédé de production de diphosphures de pentaérythrite à teneur élevée en isomère spiro. Les diphosphures de pentaérythrite sont produits via une transestérification séquentielle de pentaérythrite avec un monophosphure suivi d'un phénol substitué ou d'un autre alcool, des réactions de transestérification étant réalisées dans des conditions de température et de pression contrôlées. Les conditions de réaction unique produisent des diphosphures de pentaérythrite finaux et intermédiaires à teneur élevée en isomère spiro et à rendement total élevé de diphosphures.

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