Oxidative halogenation and optional dehydrogenation of c3+...

C - Chemistry – Metallurgy – 07 – C

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C07C 17/10 (2006.01) B01J 23/10 (2006.01) B01J 27/08 (2006.01) C07C 5/48 (2006.01) C07C 17/152 (2006.01)

Patent

CA 2448500

An oxidative halogenation and optional dehydrogenation process involving contacting a reactant hydrocarbon having three or more carbon atoms, such as propane or propene, or a halogenated derivative thereof, with a source of halogen, and optionally, a source of oxygen in the presence of a rare earth halide or rare earth oxyhalide catalyst, so as to form a halogenated hydrocarbon product, such as allyl chloride, having three or more carbon atoms and having a greater number of halogen substituents as compared with the reactant hydrocarbon, and optionally, an olefinic co-product, such as propene. The less desired of the two products, that is, the halogenated hydrocarbon or the olefin as the case may be, can be recycled to the process to maximize the production of the desired product.

L'invention concerne un procédé d'halogénation oxydative et de déshydrogénation facultative, ce procédé consistant à mettre en contact un hydrocarbure réactif contenant au moins trois atomes de carbone, tel que du propane ou du propène, ou un dérivé halogéné de celui-ci, avec une source d'halogène et facultativement avec une source d'oxygène, en présence d'un halogénure de terres rares ou d'un catalyseur d'oxyhalogénure de terres rares, de sorte à former un produit hydrocarbure halogéné, tel que du chlorure d'allyle, contenant au moins trois atomes de carbone et plus de substituants halogène que l'hydrocarbure réactif, et facultativement avec un co-produit oléfinique, tel que du propène. Le produit le moins désiré des deux, soit l'hydrocarbure halogéné soit l'oléfine, selon le cas, peut être réutilisé dans ce procédé pour maximiser la production du produit désiré.

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