Preparation method of low-mercury catalyst for preparing vinyl chloride

Abstract

The invention provides a novel preparation method of a low-mercury catalyst for preparing vinyl chloride from acetylene. In the method, treated coal carbon is taken as a carrier, the vacuum impregnation method is used for loading a small amount of mercury chloride and other auxiliaries on the carrier, and rotary evaporation and other drying ways are performed to obtain the novel catalyst. Compared with a high-mercury catalyst and a precious metal catalyst which is researched and developed currently, the carrier coal carbon, and the auxiliaries related to the catalyst disclosed by the invention are lower in cost, the catalyst is safer and more environment-friendly, the adopted process is simple, and the production period is short. In the application of preparing vinyl chloride by hydrochlorinate of acetylene, the low-mercury catalyst represents excellent activity and selectivity and can be regarded as an excellent substitute for the current mainstream high-mercury catalyst.

Description

technical field [0001] The invention proposes a novel preparation method of a low-mercury catalyst used in the reaction of preparing vinyl chloride from acetylene. The method uses treated coal-based carbon as a carrier, uses a vacuum impregnation method to load a lower content of mercuric chloride and other additives on the carrier, and obtains a new catalyst by drying methods such as rotary evaporation. Compared with high-mercury catalysts and noble metal catalysts currently being developed, the cost of the carrier coal-based carbon and additives involved in the catalysts in the present invention is lower, safer and more environmentally friendly, the process adopted is simple, and the production cycle is short. In the application of acetylene hydrochlorination to vinyl chloride reaction, the low-mercury catalyst exhibits excellent activity and selectivity, so that it can be regarded as an excellent substitute for the current mainstream high-mercury catalysts. Background tec...

AI Technical Summary

Problems solved by technology

However, with the rapid decline of mercury reserves in recent years, and the country's comprehensive consideration of catalyst safety and environmental protection, high-mercury catalysts with poor stability and high hazards must transition to low-mercury and mercury-free catalysts.