Single stage process for converting oxygenates to gasoline...

C - Chemistry – Metallurgy – 10 – G

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C10G 3/00 (2006.01)

Patent

CA 2385400

A process for selectively converting a feed comprising oxygenate to normally liquid boiling range C5+ hydrocarbons in a single step is provided which comprises a) contacting the feed under oxygenate conversion conditions with a catalyst comprising a unidimensional 10-ring zeolite, e.g., one selected from the group consisting of ZSM-22, ZSM-23, ZSM-35, ZSM-48, ZSM-57, and ferrierite, at temperatures below 350 ~C and oxygenate pressures above 40 psia (276 kPa); and b) recovering a normally liquid boiling range C5+ hydrocarbons- rich product stream, e.g., gasoline and distillate boiling range hydrocarbons or C4 to C12 olefins.

La présente invention concerne un procédé permettant de transformer, de façon sélective, une matière d'alimentation comprenant des composés oxygénés en hydrocarbures C¿5?+ à plage d'ébullition normalement liquide, en une seule étape. Ce procédé consiste a) à mettre la matière d'alimentation en contact avec un catalyseur comprenant un zéolite cyclique à 10 éléments unidimensionnel, par exemple un choisi dans le groupe formé par ZSM-22, ZSM-23, ZSM-35, ZSM-48, ZSM-57 et la ferriérite, dans des conditions de transformation de composés oxygénés, à des températures inférieures à 350 ·C et à des pressions de composés oxygénés supérieures à 40 psia (276 kPa) et b) à récupérer un courant de produit riche en hydrocarbures C¿5?+ à plage d'ébullition normalement liquide, par exemple des hydrocarbures à plage d'ébullition d'essence et de distillat ou des oléfines C¿4? à C¿12?.

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