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ժҪ �԰�͹��ճ��(AT)Ϊ��,��Ϊ��Դ,ͨ��շ��Ʊ��WO3/AT�߻��,��FT-IR��XRD��˱��,��30%(��)H2O2Ϊ��Դ��嶡��(TBA)Ϊ�ܼ��о��ڻ��ϩ(CPE)��Ӧ�еĴ߻��ܡ��,WO3��ȵط�ɢ�ڰ�͹��ճ��;��V[30%(��)H2O2]/V(CPE)=2.2,V(TBA)/V(CPE)=10��,��Ӧ��˹��Ϊ:��Ӧ�¶�Ϊ308 K��Ӧʱ��Ϊ24 h��߻��Ϊ0.3 g/mL(CPE)��WO3��Ϊ40.0%(��)��߻��¶�Ϊ823 K�ͱ��ʱ��Ϊ2 h,�ڴ��,��ϩ��(CPO)��Ϊ40.2%,CPE��ת��Ϊ92.1%��ô߻��CPE�Ļ��Ӧչ��˽ϺõĴ߻��ԡ�

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�ؼ���� ͹��ճ��(AT) WO3/AT�߻�� ϩ ��

Abstract�� A supported WO_3 attapulgite catalyst(WO_3/AT)was prepared using impregnation method with attapulgite clay(AT) as catalyst supporter and ammonium tungstate as tungsten precursor,and its structure was characterized by FT-IR and XRD.And then using 30%(mass percent) H_2O_2 as oxygen resource and tert-butyl alcohol(TBA) as solvent,its catalytic activity was researched in the epoxidation reaction of cyclopentene(CPE).The experimental results showed that WO_3 was homogeneously dispersed on the surface of attapulgite.Under the conditions of(30% (mass percent) H_2O_2)/(CPE)=2.2 and V(TBA)/V(CPE)=10,the suitable technological conditions for the reaction: reaction temperature was 308 K, reaction time was 24 h,catalyst was 0.3 g/mL(CPE),the loading content of WO_3 was 40.0%(mass percent),the calcination temperature and time of the catalyst was 823 K and 2 h respectively.Under these conditions,the yield of 1,2-epoxycyclopentane(CPO) was 40.2%,the conversion of CPE was 92.1%.The catalyst exhibited a good catalytic activity in the epoxidation reaction of CPE.

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Received 2009-11-15; published 2009-11-15

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��ȫ;��;Ѧ��;��Ө;��ѩ��;��;.��͹��ճ��WO_3�߻��ڻ��ϩ��Ӧ[J]. ��ѧ��ҵ�빤��, 2009,26(6): 500-505

LAI Shi-quan,YUE Li,XUE Xiao-qian,CHEN Ying,ZHAO Xue-fei,GAO Li-juan.Application of Supported WO_3 Attapulgite Catalyst in Epoxidation of Cyclopentene[J]. Chemcial Industry and Engineering, 2009,26(6): 500-505