Abstract:
A catalyst composition comprising palladium, silver and a support material (preferably alumina) is contacted at a relatively low temperature (of up to about 60°C) with a liquid composition comprising an effective reducing agent (preferably an alkali metal borohydride, hydrazine, formaldehyde, formic acid, ascorbic acid, dextrose, aluminum powder). Preferably, at least one alkali metal compound (more preferably KOH, RbOH, CsOH, KF) is also present in the liquid composition. An improved process for selectively hydrogenating acetylene (to ethylene) employs this wet-reduced catalyst composition.
Abstract:
A catalyst composition comprising palladium, silver and a support material (preferably alumina) is contacted at a relatively low temperature (of up to about 60°C) with a liquid composition comprising an effective reducing agent (preferably an alkali metal borohydride, hydrazine, formaldehyde, formic acid, ascorbic acid, dextrose, aluminum powder). Preferably, at least one alkali metal compound (more preferably KOH, RbOH, CsOH, KF) is also present in the liquid composition. An improved process for selectively hydrogenating acetylene (to ethylene) employs this wet-reduced catalyst composition.
Abstract translation:的催化剂组合物包含钯,银和载体材料(优选氧化铝)在用液体组合物,包括相对低的温度(高达约60℃的)(优选的碱金属硼氢化物,肼,甲醛的有效还原剂接触 ,甲酸,抗坏血酸,葡萄糖,铝粉末)。 优选地,至少一种碱金属化合物(更优选KOH,R B OH,CsOH,三KF)因此在该液体组合物中存在。 为选择性氢化乙炔(以乙烯)的改进的方法采用该湿式还原的催化剂组合物。
Abstract:
A catalyst composition comprises palladium, at least one chemically bound alkali metal (preferably potassium), chemically bound fluorine and an inorganic support material (preferably alumina), wherein the atomic ratio of fluorine to alkali metals about 1.3:1 to about 4:1. Preferably, silver is also present in the catalyst composition. The above-described catalyst is employed as a catalyst in the selective hydrogenation of C 2 -C 10 alkynes (preferably acetylene) to the corresponding alkenes in the presence of sulfur impurities.