AN OXYGENATE CONVERSION PROCESS

摘要

A process for converting oxygenates to polyolefins comprising: a) feeding an oxygenate containing feed to an oxygenate to olefins conversion reactor; b) contacting the oxygenate containing feed with a molecular sieve catalyst under oxygenate to olefins conversion conditions in the reactor to form a product stream comprising propylene, ethylene and mixed C4s; c) separating the ethylene from the product stream; d) separating the mixed C4s from the product stream to form a mixed C4 stream comprising isobutylene, 1-butene and 2-butene and butanes; e) removing isobutylene from the mixed C4 stream by contacting the mixed C4 stream with methanol or ethanol to form MTBE or ETBE; f) separating the 1-butene from the mixed C4 stream; g) passing at least part of the ethylene and at least part of the 1-butene to a polyethylene unit where the 1-butene is used as a co-monomer in the production of polyethylene.