Process for the conversion of methanol to light olefins and cata

Details Process for the conversion of methanol to light olefins and cata Process for the conversion of methanol to light olefins and cata

1993-04-29

1994-11-22

Dees, Carl F.

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

From nonhydrocarbon feed

502 65, B01J 2928, C07C 120

Patent

active

053671007

ABSTRACT:
A zeolite catalyst from ZSM-5 modified with phosphorus, rare earth elements and pore structure regulator is used for methanol/dimethyl ether conversion to light olefins.
High temperature, non-recycling, continuous-running process is realized in the reactor system, comprising a dehydration reactor and several (2-n) adiabatic, fixed bed cracking reactors, loaded with the catalyst in multi-stage packing and operated in reaction regeneration cycles. The catalyst possesses high activity, high selectivity, good hydrothermal stability and long reaction life time.
Operation of 100% methanol conversion and >85% C.sub.2 -C.sub.4 selectivity has been performed in a reactor system of the scale 0.7-1 ton CH.sub.3 OH/day for >600 hours on stream and with reaction time of single cycle >24 hours.

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