Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – Zsm type
Patent
1994-08-09
1996-11-12
Pal, Asok
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
Zsm type
502 65, B01J 2940
Patent
active
055739903
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.
REFERENCES:
patent: 5367100 (1994-11-01), Gongwei et al.
Chen Guoquan
Wang Gongwei
Wang Xingchun
Ying Muliang
Dalian Institute of Chemical Physics
Pal Asok
Yildirim Bekir L.
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