The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 2025
Filed:
Sep. 02, 2019
Wanhua Chemical (Ningbo) Co., Ltd., Ningbo, CN;
Wanhua Chemical Group Co., Ltd., Yantai, CN;
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;
Jie Shi, Yantai, CN;
WANHUA CHEMICAL (NINGBO) CO., LTD., Ningbo, CN;
WANHUA CHEMICAL GROUP CO., LTD, Yantai, CN;
Abstract
Provided in the invention are a catalyst for preparing phosgene and a preparation method therefor, and a method for the preparation of phosgene and the comprehensive utilization of energy thereof. The preparation method comprises the following steps: 1) stirring and soaking activated carbon in a modifying solution, then adding dimethyltin dichloride and chromium oxide powders and carrying out a reaction, and then adding a nickel oxide fine powder and ultrasonically oscillating same to prepare a pre-modified activated carbon; 2) drying the pre-modified activated carbon; and 3) heating and calcinating the dried pre-modified activated carbon from step 2) to prepare the catalyst.