US 12,269,786 B2
Preparation method and production device for propylene
Kai Qiao, Liaoning (CN); Feng Zhou, Liaoning (CN); Xiuna Yang, Liaoning (CN); Huixia Ma, Liaoning (CN); Rui Jiang, Liaoning (CN); Shumei Zhang, Liaoning (CN); Ping Jin, Liaoning (CN); and Shaozhong Peng, Liaoning (CN)
Assigned to CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and SINOPEC DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS CO., LTD., Liaoning (CN)
Appl. No. 18/245,982
Filed by CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and SINOPEC DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS CO., LTD., Liaoning (CN)
PCT Filed Oct. 29, 2021, PCT No. PCT/CN2021/127293
§ 371(c)(1), (2) Date Mar. 20, 2023,
PCT Pub. No. WO2022/089570, PCT Pub. Date May 5, 2022.
Claims priority of application No. 202011196836.5 (CN), filed on Oct. 31, 2020; application No. 202011196837.X (CN), filed on Oct. 31, 2020; application No. 202011198803.4 (CN), filed on Oct. 31, 2020; and application No. 202111253863.6 (CN), filed on Oct. 27, 2021.
Prior Publication US 2023/0357102 A1, Nov. 9, 2023
Int. Cl. C07C 1/24 (2006.01); C07C 1/207 (2006.01); C07C 7/04 (2006.01)
CPC C07C 1/24 (2013.01) [C07C 1/2076 (2013.01); C07C 7/04 (2013.01); C07C 2521/04 (2013.01); C07C 2521/06 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A dehydration process, comprising a dehydration step of subjecting a starting material containing isopropanol to a dehydration reaction in the presence of a dehydration catalyst comprising alumina to produce a product containing propylene, wherein the starting material has a water content of 3.0 to 5.0 wt %, relative to 100 wt % of the total mass of the starting material, and the product has a total content of C2 unsaturated impurities and C3-C4 unsaturated impurities of 80 ppm or less, relative to 100 wt % of the total mass of the product, wherein said product has a C2 unsaturated impurities content of 50 ppm or less, and the conversion rate of isopropanol is 96.0-99.9%.