Process for producing propylene oxide

C - Chemistry – Metallurgy – 07 – D

Patent

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C07D 301/19 (2006.01)

Patent

CA 2378848

A process for producing propylene oxide comprising the following steps: an oxidation step in which isopropylbenzene is oxidized to obtain isopropylbenzene hydroperoxide; an epoxidation step in which the isopropylbenzene hydroperoxide obtained in the oxidation step is reacted with propylene to obtain propylene oxide and cumyl alcohol; a hydrogenation step in which the cumyl alcohol obtained in the epoxidation step is decomposed by hydrogenation to obtain isopropylbenzene, which is recycled as a feed material to the oxidation step; and an organic-acid removal step in which any organic acid is removed from the system in or after at least one of the above steps.

L'invention concerne un procédé de production d'oxyde de propylène, qui consiste en plusieurs étapes: une étape d'oxydation dans laquelle on oxyde un isopropylbenzène afin d'obtenir un hydroperoxyde isopropylbenzène; une étape d'époxydation dans laquelle on fait réagir l'hydroperoxyde isopropylbenzène obtenu lors de l'étape d'oxydation avec du propylène, afin d'obtenir de l'oxyde de propylène et de l'alcool de cumyle; une étape d'hydrogénation dans laquelle on décompose par hydrogénation l'alcool de cumyle obtenu lors de l'étape d'époxydation, afin d'obtenir un isopropylbenzène, lequel est recyclé en tant que substance de base vers l'étape d'oxydation; et une étape d'extraction d'acide organique, dans laquelle on extrait du système tout acide organique pendant ou après au moins une des étapes susmentionnées.

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