Mercury-free catalyst for synthesizing vinyl chloride by acetylene method and preparation method thereof

Abstract

The invention relates to a mercury-free catalyst for synthesizing vinyl chloride by an acetylene method and a preparation method. The preparation method comprises the following steps of using an acetic acid solution to soak coconut husk activated carbon for 8 to 24h, and using deionized water to wash the activated carbon to neutral state, so as to obtain a pretreated carrier; then, while stirring at normal temperature, dissolving ruthenium trichloride, cuprous chloride and bismuth chloride into a hydrochloric acid solution, impregnating the solution into the pretreated coconut husk activated carbon under the vacuum atmosphere, performing rotary evaporation, and drying, so as to obtain the required catalyst. The preparation method has the beneficial effects that the mercury-free catalyst has high activity and selectivity when the acetylene is catalyzed to synthesize the vinyl chloride; the mercury-free catalyst uses the mercury-free active component, the green and environment-friendly effects are realized, the multiple sets of auxiliary equipment are not needed, the difficulty in preparation is low, the production technology is simple, and the preparation method is suitable for industrialized production.

Description

technical field

[0001] The invention relates to a catalyst preparation technology, in particular to a mercury-free catalyst for synthesizing vinyl chloride by acetylene method and a preparation method. Background technique

[0002] Polyvinyl chloride is one of the plastic products with the largest output in the world. The demand for vinyl chloride monomer of polyvinyl chloride will increase. my country's energy structure of "more coal, less gas and less oil" determines that in the next few decades The main production method of vinyl chloride will still be the acetylene method. At present, the loss of mercury in the mercury catalyst used in the synthesis of vinyl chloride by the acetylene method in my country is very serious. On the one hand, it leads to a sharp decline in domestic mercury reserves and resource shortages. On the other hand, the lost mercury seriously pollutes the environment and endangers human health. It is imperative to develop a mercury-free catalyst for t...