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�ؼ���� ߻�� ͭ��ʹ߻�� ͭ��Ƽ� �� ߻�� ͭ��ʹ߻�� ͭ��Ƽ� ��

Abstract�� The catalytic perform ance of Cu/�� Al2 O3 and Cu O/�� Al2 O3 em ployed for cycli sation of �� hydroxyethylethylenediam ine w ere studied in the present paper. Thesim ilar results w ere obtained from cyclisations of�� 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 �� Al2 O3w as em ployed as carrier,the stability ofthe catalystw as greatly im proved.

Keywords�� catalytic am ination copper oxide containing catalyst

Received 1999-09-15; published 1999-09-15

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��,��,��˫,��»,��,��ά��.��-��һ��Ҷ��ϴ߻��о�[J]. ��ѧ��ҵ�빤��, 1999,16(5): 275-279

Chen Ligong Lu Meng Xu Zhengshuang Wang Duolu Fan Guoliang Zhou Weiyi.Study on the Catalysts Em ployed in Cyclisation of�©� Hydroxyethylethylenediam ine[J]. Chemcial Industry and Engineering, 1999,16(5): 275-279