Patent ID: 7166757

Claim:
A process for converting an oxygenate-containing feedstock into one or more olefins, the process comprising: (a) contacting the feedstock in a reaction zone with a fluidized bed of a particulate catalyst composition comprising a molecular sieve and at least one metal oxide, selected from Group 3 metals. Lanthanide series metals, Actinide series metals, and Group 4 metals of the Periodic Table of Elements, having an uptake of carbon dioxide at 100° C. of at least 0.03 mg/m 2 of the metal oxide whereby at least part of the feedstock is converted into a product stream comprising one or more olefins and a carbonaceous material is deposited on the catalyst composition to produce a coked catalyst composition; (b) separating the coked catalyst composition from the product stream; (c) contacting a first portion of the coked catalyst composition with a regeneration medium in a regeneration zone under conditions to remove at least part of the carbonaceous material from the coked catalyst composition and produce a regenerated catalyst composition; (d) recycling at least part of the regenerated catalyst composition to the reaction zone; and (e) passing a second portion of the coked catalyst composition to the reaction zone without contacting said second portion of the coked catalyst composition with a regeneration medium.