Catalyst for producing vinyl chloride

Abstract

The invention relates to a catalyst used to produce chloroethylene, wherein said catalyst is prepared by immerging active carbon in mercuric chloride solution; the active carbon uses coir as material to be distilled and carbonized, steamed at high temperature and activated, to improve the mechanical strength and specific area; the mercuric chloride solution is added with stannochlor and lanthanum chloride, to improve the thermal resistance and prolong the service life. Said production can avoid activation, shorten produce time, and improve producing efficiency, with the application at high reaction airflow speed. The invention can improve activity and selectivity, to reduce the coat and the catalyst exchange times.

Description

Technical field: [0001] The invention relates to a catalyst, in particular to a catalyst for producing vinyl chloride. Background technique: [0002] Acetylene and hydrogen chloride synthesize vinyl chloride, and the reaction speed is almost zero in the temperature range of 100-180 ° C without catalyst. When activated carbon adsorbed mercuric chloride is used as a catalyst for the reaction, the reaction process is greatly accelerated. Pure mercuric chloride powder or activated carbon has no activity on the synthesis of vinyl chloride, and once mercuric chloride is adsorbed on the surface of activated carbon, the interaction between the two makes the reaction have excellent activity and selectivity. The most ideal catalyst. At present, active carbon is often used to impregnate mercury chloride solution in the preparation of such catalysts, and the concentration of mercury chloride is 8-12%. Since the sublimation property of mercuric chloride has not been changed, the cataly...

AI Technical Summary

Problems solved by technology

Since the sublimation of mercuric chloride has not changed, the catalyst has poor heat resistance, short service life, and a large amount of catalyst used. The production of vinyl chloride consumes about 1kg of catalyst per ton

And the use of ordinary activated carbon has low mechanical strength and is fragile, which also leads to an increase in the amount of catalyst used and a long activation time. Before use, in order to prevent catalyst poisoning, it is necessary to use a large amount of hydrogen chloride gas for activation