【摘要】 本文研究了 Ｃｕ／γ Ａｌ２ Ｏ３ 与 Ｃｕ Ｏ／γ Ａｌ２ Ｏ３ 两种催化剂对β羟乙基乙二胺环合反应的催化作用，证明在一定条件下，上述两种催化剂的作用类似，环合出哌嗪的收率可达８７％ 以上。此外，还对催化剂 Ｃｕ Ｏ／γ Ａｌ２ Ｏ３ 进行了修饰和改性，从而提高了催化剂的稳定性和选择性。用铜抑制剂处理载体而制备的催化剂，哌嗪的最高收率可达９２％ ；以γ Ａｌ２ Ｏ３ 超细粉为载体的催化剂的稳定性可得以提高。更多还原

【Abstract】 The catalytic perform ance of Cu/γ Al2 O3 and Cu O/γ Al2 O3 em ployed for cycli sation of β hydroxyethylethylenediam ine w ere studied in the present paper. Thesim ilar results w ere obtained from cyclisations ofβ hydroxyethylethylenediam ine byem ployed the above tw o catalysts under certain reaction conditions,the yield ofpiperazine w as up to 87% . Furtherm ore,m odification ofthe catalystw as carried outin order to increase ofthe selectivity and stability ofthe catalystw hen the catalystprepared from treated carrier w ith copper deactivator w as em ployed forthe cyclisa tion,piperazine w as obtained up to 92% yield. As the superfine pow der of γ Al2 O3w as em ployed as carrier,the stability ofthe catalystw as greatly im proved.更多还原