Patent ID: 7196239
Filing Date: 2007-03-27
Classification: C07C,Y02P

Abstract:
1. A process for producing light olefins, the process comprising the steps of: (a) contacting syngas in the presence of one or more metal-containing catalysts to produce a first feedstock comprising methanol; (b) converting a portion of the methanol in a homologation zone to a second feedstock comprising ethanol by contacting the portion of the methanol with a homologation catalyst selected from the group consisting of potassium oxides, cobalt-molybdenum sulfides, nickel-molybdenum sulfides and potassium carbonates; and (c) introducing the first feedstock and the second feedstock to a process for converting the methanol and the ethanol in the presence of a silicoaluminophosphate molecular sieve catalyst composition to the light olefins, wherein the combined feedstock has a methanol to ethanol weight ratio of from 4.0:1.0 to 19.0:1.0 and the process for converting the methanol and the ethanol to light olefms is carried out at a temperature of from 475° C. to 500° C.