US 12,226,761 B2
Catalyst for preparing phosgene and preparation method therefor, and method for preparation of phosgene and comprehensive utilization of energy thereof
Chao Dong, Yantai (CN); Dongke Zhao, Yantai (CN); Yujie Zhou, Yantai (CN); Chaoqun Li, Yantai (CN); Fang Wen, Yantai (CN); Wenbo Wang, Yantai (CN); Hongke Zhang, Yantai (CN); Dan Xu, Yantai (CN); Chong Li, Yantai (CN); and Jie Shi, Yantai (CN)
Assigned to WANHUA CHEMICAL (NINGBO) CO., LTD., Ningbo (CN); and WANHUA CHEMICAL GROUP CO., LTD, Yantai (CN)
Appl. No. 17/623,096
Filed by WANHUA CHEMICAL (NINGBO) CO., LTD., Ningbo (CN); and WANHUA CHEMICAL GROUP CO., LTD., Yantai (CN)
PCT Filed Sep. 2, 2019, PCT No. PCT/CN2019/104075
§ 371(c)(1), (2) Date Dec. 27, 2021,
PCT Pub. No. WO2021/035769, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 201910813621.4 (CN), filed on Aug. 30, 2019.
Prior Publication US 2022/0266237 A1, Aug. 25, 2022
Int. Cl. B01J 37/34 (2006.01); B01J 6/00 (2006.01); B01J 21/18 (2006.01); B01J 37/02 (2006.01); B01J 37/08 (2006.01); C01B 32/80 (2017.01)
CPC B01J 37/343 (2013.01) [B01J 6/001 (2013.01); B01J 21/18 (2013.01); B01J 37/0215 (2013.01); B01J 37/08 (2013.01); C01B 32/80 (2017.08)] 18 Claims
OG exemplary drawing
 
1. A preparation method of a catalyst for preparing phosgene, comprising the following steps:
(1) soaking activated carbon in a modified solution with stirring, then adding dimethyltin dichloride and chromium oxide powder to the modified solution for reaction, and adding heat-treated nickel oxide fine powder and performing ultrasonic oscillation to obtain pre-modified activated carbon, wherein the modified solution is a mixed acid solution comprising phosphoric acid and silicic acid;
(2) drying the pre-modified activated carbon obtained in step (1); and
(3) under the protection of an inert gas, heating and calcining the pre-modified activated carbon dried in step (2) to obtain the catalyst.