Catalytic destruction of organohalogen compounds

B - Operations – Transporting – 01 – J

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B01J 23/64 (2006.01) B01D 53/86 (2006.01) B01J 21/06 (2006.01) B01J 23/648 (2006.01) B01J 23/652 (2006.01) A62D 3/00 (2006.01)

Patent

CA 2051117

This application relates to a catalyst and a process using this catalyst to convert or destroy organic compounds including organohalogen compounds. A preferred catalyst contains as catalytic components titania, vanadium oxide, tungsten oxide, tin oxide and at least one noble metal selected from the group consisting of platinum, palladium and rhodium, characterized in that the vanadium oxide, tungsten oxide and noble metals are uniformly dispersed on the titania. The process of this invention comprises contacting the gas stream, which contains organohalogen compounds and other organic compounds, at a temperature of about 200 to about 500°C with the catalyst described above in the presence of an oxidizing agent and water. The oxidizing agent can be oxygen or air.

L'invention concerne un catalyseur et un procédé utilisant ce dernier, permettant de transformer ou de détruire des composés organiques comprenant des composés d'organohalogène. Un catalyseur préféré contient en tant que constituant catalytique du dioxyde de titane, de l'oxyde de vanadium, de l'oxyde de tungstène, de l'oxyde d'étain ainsi qu'au moins un métal noble choisi dans le groupe composé du platine, du palladium et du rhodium, et se caractèrise en ce que l'oxyde de vanadium, l'oxyde de tungstène et les métaux nobles sont dispersés uniformément sur le dioxyde de titane. Le procédé de l'invention consiste à mettre en contact le courant de gaz, lequel contient des composés d'organohalogène ainsi que d'autres composés organiques, à une température comprise à environ 200 et environ 500°C, avec le catalyseur précité, en présence d'un agent oxydant et d'eau. Ledit agent oxydant peut être l'oxygène ou l'air.

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