US 12,441,943 B2
Fluidized catalytic conversion method for preparing low-carbon olefins
Youhao Xu, Beijing (CN); Yanfen Zuo, Beijing (CN); Xingtian Shu, Beijing (CN); Xieqing Wang, Beijing (CN); Yibin Luo, Beijing (CN); Yunpeng Zhang, Beijing (CN); Yueyang Han, Beijing (CN); and Lingyin Du, Beijing (CN)
Assigned to CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and SINOPEC RESEARCH INSTITUTE OF PETROLEUM PROCESSING CO., LTD., Beijing (CN)
Appl. No. 18/260,643
Filed by CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and SINOPEC RESEARCH INSTITUTE OF PETROLEUM PROCESSING CO., LTD., Beijing (CN)
PCT Filed Jun. 24, 2021, PCT No. PCT/CN2021/101925
§ 371(c)(1), (2) Date Jul. 7, 2023,
PCT Pub. No. WO2022/147970, PCT Pub. Date Jul. 14, 2022.
Claims priority of application No. 202110031544.4 (CN), filed on Jan. 11, 2021; and application No. 202110031545.9 (CN), filed on Jan. 11, 2021.
Prior Publication US 2024/0067885 A1, Feb. 29, 2024
Int. Cl. C10G 11/05 (2006.01); C10G 11/18 (2006.01)
CPC C10G 11/182 (2013.01) [C10G 11/05 (2013.01); C10G 2300/1088 (2013.01); C10G 2300/4006 (2013.01); C10G 2300/4012 (2013.01); C10G 2300/4081 (2013.01); C10G 2300/701 (2013.01); C10G 2400/20 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A fluidized catalytic conversion method for producing light olefins, comprising the steps of:
1) Introducing an olefin-rich feedstock through a first inlet into a fluidized catalytic conversion reactor, contacting with a catalytic conversion catalyst, and reacting under first catalytic conversion conditions, wherein the olefin-rich feedstock has an olefin content of 50 wt % or more and the catalyst conversion catalyst is preheated to a temperature of 650° C. or higher;
2) Separating the effluent of the fluidized catalytic conversion reactor to obtain a reaction product vapor and a spent catalyst, and separating the reaction product vapor to obtain ethylene, propylene, butylene and a stream comprising C5+ olefins; and
3) feeding at least a part of the stream comprising C5+ olefins obtained from step 2) to the fluidized catalytic conversion reactor through a second inlet located downstream from the first inlet for further reaction,
wherein the first catalytic conversion conditions include:
a reaction temperature of 600-800° C.;
a reaction pressure of 0.05-1 MPa;
a reaction time of 0.01 to 100 seconds; and
a weight ratio of the catalytic conversion catalyst to the olefin-rich feedstock of (1-200):1;
and
4) feeding at least a part of the butylene obtained from step 2) to the fluidized catalytic conversion reactor at a third inlet located downstream from the first inlet for further reaction under second catalytic conversion conditions,
wherein the second catalytic conversion conversions include:
a reaction temperature of 650-800° C.;
a reaction pressure of 0.05-1 MPa;
a reaction time of 0.01 to 10 seconds; and
a weight ratio of the catalytic conversion catalyst to the butylene of (20-200):1.