乙烯环氧化助催化作用的研究──多晶银表面化学修饰法  

Promoting Effect for Ethylene Epoxidation by Chemical Modification of Electrolytic Silver

作　　者：彭寅生 张式[1] 

机构地区：[1]上海石油化工研究院

出　　处：《工业催化》1994年第4期31-35,共5页Industrial Catalysis

摘　　要：根据多晶银（电解银）表面吸附态氧主要是吸附态原子氧和次表层溶解氧的特性，探索并证实了电解银表面具有乙烯环氧化反应活性，从而研究了Ｂａ和Ｃｓ化合物修饰电解银表面对乙烯氧化反应的助催化作用．Ｂａ增加了活性，Ｃｓ降低了活性，但增大了环氧乙烷的选择性．对比了负载银添加Ｂａ和Ｃｓ化合物后的助催化性能，获得了一致的结果．表明电解银表面化学修饰可作为选择和研究Ａｇ助催化剂的一种合理而简便的手段．The promoting effect of Ba and Cs for ethylene epoxidation was investigated by the chemical modification of surface of electrolytic silver.In comparison with unmodified electrolytic silver surface,Ba modified surface is more active and Cs modified surface has higher selectivity at the expense of activity.These results are consistent with those of α-Al2O3 supported silver samples.So it is a simple and reliable method for searching and studying the silver catalyst promoters.

关 键 词：环氧化 银催化剂 环氧乙烷 乙烯 助催化剂 

分 类 号：TQ426.81[化学工程] O623.425[理学—有机化学]