A process for the conversion of ethylene to vinyl chloride,...

C - Chemistry – Metallurgy – 07 – C

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C07C 17/156 (2006.01) B01J 27/125 (2006.01) B01J 37/03 (2006.01) B01J 37/22 (2006.01) C07C 17/25 (2006.01) C07C 17/38 (2006.01)

Patent

CA 2391582

This invention is a process for producing vinyl chloride from an ethylene- containing feed, oxygen, and a chlorine source in the presence of a catalyst. The process permits direct production of vinyl chloride in a single reactor system, and further permits ethane to be used as the C2 hydrocarbon feed with recycle of ethylene from the product stream to constitute the ethylene specified for the feed. This invention in another aspect concerns also a composition of matter, and a method for making the composition, wherein the composition is useful as a catalyst for the vinyl chloride process. The composition comprises a rare earth-containing material, with the proviso that the catalyst prepared therefrom is substantially free of iron and copper and with the further proviso that when cerium is present the catalyst further comprises at least one more rare earth element other than cerium.

La présente invention concerne un procédé de production de chlorure de vinyle à partir d'une alimentation d'éthylène, d'une source d'oxygène et d'une source de chlore en présence d'un catalyseur. Ce procédé permet la production directe de chlorure de vinyle dans un système de réacteur unique, et permet, en outre, d'utiliser l'éthane comme alimentation d'hydrocarbure C2 avec de l'éthylène recyclé du courant de produit afin de former un éthylène spécifique pour l'alimentation. Dans un autre aspect, l'invention concerne également une composition, et un procédé de préparation de cette composition, cette dernière étant utile en tant que catalyseur d'un procédé de chlorure de vinyle. La composition comprend une matière alcolinoterreuse rare, à condition que le catalyseur préparé au moyen de cette composition soit sensiblement dépourvu de fer et de cuivre, et à condition qu'en présence de cérium, le catalyseur comprenne également au moins un ou plusieurs éléments terreux autres que du cérium.

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