Patent
Production of phosgene
Shigekazu Nakano,重和 中野 +1 more
TLDR
In this paper, a method for producing phosgene comprises reacting chlorine with carbon monoxide having a hydrogen gas content of ≤ 6.0mol.% in an amount excessive by 1-30mol.Abstract:
PROBLEM TO BE SOLVED: To obtain colorless phosgene in a high yield by reacting chlorine with carbon monoxide reduced in the content of hydrogen in the presence of an activated carbon catalyst. SOLUTION: This method for producing phosgene comprises reacting chlorine with carbon monoxide having a hydrogen gas content of ≤6mol.% in an amount excessive by 1-30mol.% based on a stoichiometric amount in the presence of an activated carbon catalyst in an amount of 800-1300kg based on 1000m 2 /hr of the carbon monoxide. The carbon monoxide reduced in the hydrogen gas content is produced by bringing carbon monoxide having a hydrogen gas content of ≥6.0mol.% into contact with an adsorbent such as silica gel, calcium chloride or activated alumina or by heating the carbon monoxide in the presence of a catalyst such as copper-activated carbon catalyst or copper-manganese- activated carbon catalyst at 40-100°C to convert the hydrogen into water, and subsequently bringing the water-containing carbon monoxide into contact with an adsorbent. COPYRIGHT: (C)1998,JPOread more
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Catalyst for preparing phosgene and preparation method therefor, and method for preparation of phosgene and comprehensive utilization of energy thereof
Dong Chao,Zhao Dongke,Zhou Yujie,Li Chaoqun,Wen Fang,Wang Wenbo,Zhang Hongke,Xu Dan,Li Chong,Shi Jie +9 more
TL;DR: In this article, a method for the preparation of phosgene and the comprehensive utilization of energy is presented, where thin layers are formed on the surface of the catalyst by bonding chromium tin phosphate and chromium oxide with Ni by means of -O-Ni-O-, respectively, which can improve the high temperature resistance and oxidation resistance of the activated carbon, and improve the safe and stable operation level of a device.