US 12,264,118 B2
Process for producing lower olefins from oxygenates
Guozhen Qi, Shanghai (CN); Jing Cao, Shanghai (CN); Xiaohong Li, Shanghai (CN); Hongtao Wang, Shanghai (CN); Yongming Jin, Shanghai (CN); and Pan Gao, Shanghai (CN)
Assigned to CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and SHANGHAI RESEARCH INSTITUTE OF PETROCHEMICAL TECHNOLOGY, SINOPEC, Shanghai (CN)
Appl. No. 17/906,230
Filed by CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and SHANGHAI RESEARCH INSTITUTE OF PETROCHEMICAL TECHNOLOGY, SINOPEC, Shanghai (CN)
PCT Filed Mar. 11, 2021, PCT No. PCT/CN2021/080114
§ 371(c)(1), (2) Date Sep. 13, 2022,
PCT Pub. No. WO2021/180150, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. 202010173926.6 (CN), filed on Mar. 13, 2020; and application No. 202010173939.3 (CN), filed on Mar. 13, 2020.
Prior Publication US 2023/0118436 A1, Apr. 20, 2023
Int. Cl. C07C 1/22 (2006.01); B01D 45/16 (2006.01); B01J 8/18 (2006.01); B01J 8/24 (2006.01)
CPC C07C 1/22 (2013.01) [B01D 45/16 (2013.01); B01J 8/1827 (2013.01); B01J 8/24 (2013.01); C07C 2529/89 (2013.01)] 18 Claims
OG exemplary drawing
 
1. 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;
wherein the effective conditions comprise 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 %, based on the total weight of the catalysts in the fluidized bed reaction zone;
the catalyst having a coke deposition amount of from 3 wt % to less than 5 wt % represents 10 to 70 wt %, based on the total weight of the catalysts; and
the catalyst having a coke deposition amount from 5 wt % to 10 wt % represents 10 to 88 wt %, based on the total weight of the catalysts.