Abstract: Au-Cu-K mercury-free catalyst was prepared by impregnation. Activity evaluation of Au-Cu-K mercury-free catalyst for acetylene hydrochlorination was conducted in a single pipe reactor. The structures of fresh and used catalysts were characterized with BET，SEM，TEM，FT IR and ICP-AES. C2H2 conversion on Au-Cu-K mercury-free catalyst reduced slowly from 98% to 89%，and VCM selectivity was more than 99% under reaction conditions of temperature 170℃，space velocity 20h-1 and feed ratio v(HCl)∶v(C2H2)=1.1 in the whole 1600 hours running. The main reason for decrease of catalyst activity was polyethylene-like compounds formed on the surface of catalyst.

Key words: catalyst, scale-up, deactivation, viny chloride, mercury-free

摘要： 采用浸渍法制备Au-Cu-K三组元无汞催化剂，在中试单管固定床反应器中考察了Au-Cu-K催化剂用于乙炔氢氯化反应制取氯乙烯的催化效能，并采用微结构分析仪、扫描电镜、透射电镜、红外光谱、电感耦合等离子体发射光谱等对反应前后的无汞催化剂进行了对比分析表征。结果表明，Au-Cu-K催化剂在反应温度170℃、常压、空速20h?1、v(HCl)∶v(C2H2)=1.1的条件下，乙炔转化率从初始的98%缓慢下降到1600h后的89%，氯乙烯选择性在整个反应期间始终大于99%；Au-Cu-K无汞催化剂的活性下降主要是表面生成了类聚乙烯化合物。

关键词: 催化剂, 放大, 失活, 氯乙烯, 无汞