Dalian Institute of Chemical Physics

Ying Muliang

Wang Gongwei

Wang Xingchun

Chen Guoquan

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 &gt;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 &gt;600 hours on stream and with reaction time of single cycle &gt;24 hours.

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Dalian, China

Ying Muliang