采用吸附相技术在乙醇-水体系中分别制备了硅胶和高岭土负载的Ag-Ni双金属催化剂,并用于硝基苯低温液相加氢制苯胺反应.考察了催化剂中Ni含量和Ni/Ag比对催化剂形貌和活性的影响.结果表明,高岭土或硅胶负载的催化剂在Ni/Ag=5(摩尔比)时活性较高,且都存在一个最佳Ni含量,分别为0.04%和0.03%.在相同条件下,以高岭土负载的Ag-Ni催化剂的活性和苯胺收率更高.
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