INCREASED CONVERSION OF RECYCLED OXYGENATES IN MTO

摘要

A process is presented for increasing the conversion efficiency of oxygenates to olefins. The conversion of oxygenates recycles unconverted oxygenates and oxygenate by-products to a second reactor unit. The present of oxygenate by-products decreases the efficiency of the methanol to olefins reaction, and passing recycled oxygenates to a second reactor unit maintains the methanol to olefins conversion efficiency while converting the by-products in a secondary zone.

主权项

1. A process for generating olefins, comprising:
passing an oxygenate to a methanol to olefins reactor comprising a fluidized reactor bed with an MTO catalyst to generate a reactor outlet stream comprising olefins and catalyst; separating the reactor outlet stream into a reaction effluent stream comprising olefins and a catalyst stream; passing the catalyst stream to a second reaction unit; passing the reaction effluent stream to a effluent stream separation unit to generate an olefins rich stream and an oxygenate rich stream; and passing the oxygenate rich stream to the second reaction unit.