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AssigneesChina Petroleum & Chemical Corporation, Shanghai Research Institute of Petrochemical Technology, Sinopec
InventorsGuozhen QI, Jing CAO, Xiaohong LI, Hongtao WANG, Yongming JIN, Pan GAO
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A process for producing lower olefins from oxygenates includes the steps of contacting a feedstock comprising oxygenates with molecular sieve catalyst in fluidized bed reaction zone under effective conditions, to produce product including ethylene and/or propylene; the effective conditions include that in the fluidized bed reaction zone, the weights of catalysts having various carbon deposition amounts are controlled, calculated as the weight of the molecular sieve in the catalysts, to have the following proportions based on the total weight of the catalysts in the fluidized bed reaction zone: the proportion of the weight of the catalyst having a coke deposition amount of less than 3 wt % is 1-20 wt %; the catalyst having a coke deposition amount of from 3 wt % to less than 5 wt % represents 10 to 70 wt %; the catalyst having a coke deposition amount from 5 wt % to 10 wt % represents 10 to 88 wt %.
A process for producing lower olefins from oxygenates, comprising the steps of contacting a feedstock comprising oxygenates with molecular sieve catalyst in fluidized bed reaction zone under effective conditions, to produce product comprising ethylene and/or propylene;
A process for producing lower olefins from oxygenates, comprising the steps of:
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