zeolite catalyzed alkylation of toluene by alcohol
نویسندگان
چکیده
vapor-phase methylation of toluene using methanol and its isopropylation with 2-propanol has been investigated ina down flow reactor under atmospheric conditions using n2 carrier over a series of surface modified andunmodified zsm-5 (si/al= 60-170) loaded with h3po4, differing in the external surface treatment of the zeolites.the feed molar ratios of toluene/methanol and toluene/2-propanol were varied over a wide range (8-0.125), andthe optimum feed ratio of toluene/alcohol was less than 0.5 in both cases. space velocity employed in toluenemethylation reported as whsv (toluene) = 1.2114, and the space velocity employed in toluene isopropylationreported as whsv (toluene) = 0.8 iii. the methylation reactions were carried out in the temperature range of 623-773 k, and the isopropylation reactions were carried out in the temperature range of 483-583 k. atmosphericpressures was maintained in all runs. catalysts containing 0-4.9 wt.% p were prepared using modified andunmodified zsm-5 zeolites, and their catalytic performance for vapor-phase alkylation of toluene with methanoland 2-propanol were investigated. the optimum phosphorous content for methylation was 2.1 wt.% p which wasgreater than the optimum phosphorous loading for isopropylation (0.7 wt.% p)
منابع مشابه
Zeolite catalyzed alkylation of toluene by alcohol
Vapor-phase methylation of toluene using methanol and its isopropylation with 2-propanol has been investigated ina down flow reactor under atmospheric conditions using N2 carrier over a series of surface modified andunmodified ZSM-5 (Si/Al= 60-170) loaded with H3PO4, differing in the external surface treatment of the zeolites.The feed molar ratios of toluene/methanol and toluene/2-propanol were...
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عنوان ژورنال:
journal of physical & theoretical chemistryISSN
دوره 7
شماره 4 2011
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