Stabilizing Function of Water Steam for Reactive Components in the Regeneration Process of Cu-Bi Bimetallic Catalyst Used in Synthesis of Vinyl Chloride
乙炔氢氯化制氯乙烯反应中水蒸汽对铜铋催化剂活性组分的稳定作用

Addition of water steam into regeneration process was applied to enhance the performance of Cu-Bi catalyst in the reaction of acetylene hydrochlorination,and the stability of the catalyst was tested by multiple reaction-regeneration cycles.The results showed that compared with traditional regeneration method by air only which could lead 95% loss of reactive components in just 6 h regeneration cycles,the process involving water steam could transform bismuth chloride formed on the catalyst surface in the reaction process into bismuth phosphate which possesses excellent thermal stability.After 15 h regeneration cycles,only 20% Bi was lost,and the initial reactivity of the catalyst could still be recovered,which can make its industrial application possible.