Non-mercuric catalyst used in hydrochlorination of acetylene and method for preparing vinyl chloride by using catalyst

Abstract

The invention relates to a non-mercuric catalyst used in hydrochlorination of acetylene and a method for preparing vinyl chloride by using the catalyst. The non-mercuric catalyst used in hydrochlorination of acetylene for preparing vinyl chloride comprises main active ingredients-gold salts, auxiliary active ingredients-non precious metal salts and a carrier, wherein the main active ingredients are gold salts and can be halides, complexes and the like of gold; gold in the gold salts accounts for 0.1-10% by weight of the catalyst; the auxiliary active ingredients are non precious metal salts and can be halides, acetates, phosphates, complexes and the like of potassium, barium, lanthanum and copper; the non precious metal salts account for 0.1-10% by weight of the catalyst; and the carrier is activated carbon, comprising coconut shell carbon, coal carbon, nutshell carbon or silica gel. The non-mercuric catalyst can be prepared by the conventional impregnation method, has simple preparation method, is environment-friendly and has the advantages of less by-products, good stability and long service life. The conversion rate of acetylene can be 90-99% and the selectivity of vinyl chloride is not lower than 99%.

Description

technical field [0001] The invention relates to a non-mercury catalyst for preparing vinyl chloride by hydrochlorination of acetylene and a method for preparing vinyl chloride using the catalyst. Background technique [0002] Vinyl chloride is a monomer for the synthesis of polyvinyl chloride, and polyvinyl chloride is one of the world's top five engineering plastics, and there is a large demand worldwide. At present, most of the industrialized production of vinyl chloride synthesis in the world adopts the ethylene method, but in my country, the vinyl chloride production has long been dominated by the acetylene method, especially at the current stage, with the increasing energy consumption, coal chemical industry is becoming more and more popular Attention, rapid development. In this energy background, compared with the ethylene method derived from the petrochemical route, the process of preparing vinyl chloride based on the acetylene method based on the coal chemical route ...

AI Technical Summary

Problems solved by technology

How to break through the technical bottleneck of poor stability of non-mercury catalysts is a problem that researchers at home and abroad pay close attention to in this field