PRODUCTION OF OLEFINS

摘要

A process for the production of olefins by catalytic cracking, the process comprising feeding a hydrocarbon feedstock containing one or more olefins of C4 or greater over an MFI-type crystalline silicate catalyst to produce an effluent containing one or more olefins of C2 or greater by catalytic cracking which is selective towards light olefins in the effluent, whereby for increasing the catalyst stability by limiting formation of coke thereon during the cracking process the catalyst has a silicon/aluminium atomic ratio of at least about 180, and the olefin partial pressure is from 0.1 to 2 bars, and the feedstock contacts the catalyst at an inlet temperature of from 500 to 600 DEG C.