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题名: Catalytic hydrodechlorination of 2,4,4 '-trichloro-2 '-hydroxydiphenylether under mild conditions
作者: Xia, CH;  Xu, J;  Wu, WZ;  Luo, Q;  Chen, JP;  Zhang, Q;  Liang, XM
关键词: 2,4,4 '-trichloro-2 '-hydroxydephenether ;  catalytic hydrodechlorination ;  base effect ;  solvent effect ;  palladium/carbon
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
发表日期: 2003-10-15
DOI: 10.1016/S0926-3373(03)00173-5
卷: 45, 期:4, 页:281-292
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Environmental ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: More than 99% of 2,4,4'-trichloro-2'-hydroxydiphenylether (TCPE) by the catalytic hydrogenation over palladium/carbon was firstly dechlorinated under mild conditions. Used molecular hydrogen as the reducing agent, TCPE was completely hydrodechorinated to 2-hydroxydiphenylether (PE) at 50degreesC and under normal pressure. The solvents affected not only the rate of the dechlorination, but also the selectivity of the hydrogenation. In general, the rate of the dechlorination decreased in the order of alcohols > alkanes > arenes > heterocycles. Addition of the bases (such as sodium hydroxide, sodium carbonate, sodium bicarbonate, triethylamine and pyridine, etc.) to the reaction systems also changed the rate of the reaction and the selectivity of the dechlorination. Except for pyridine, the other bases obviously accelerated the rate of the dechlorination. When the mixture of ethanol-water was used as the reaction solvent instead of ethanol, the rate of the dechlorination was remarkably improved. When a stoichiometric amount of sodium hydroxide was utilized as the proton acceptor in ethanol-water solvent, the catalytic life and the stability of the palladium/carbon were dramatically enhanced and promoted. The dechlorination process worked well in either organic solvents or aqueous solution and thus had potential application in the remediation of contaminated industrial waste water as well. (C) 2003 Elsevier Science B.V. All rights reserved.
关键词[WOS]: LIQUID-PHASE HYDRODECHLORINATION ;  PALLADIUM-SUPPORTED CATALYSTS ;  NOBLE-METAL CATALYSTS ;  POLYCHLORINATED-BIPHENYLS ;  IRGASAN DP300 ;  DECHLORINATION ;  BENZENE ;  HYDROGENATION ;  CHLOROPHENOLS ;  SURFACE
语种: 英语
WOS记录号: WOS:000185717300004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138329
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116012, Peoples R China

Recommended Citation:
Xia, CH,Xu, J,Wu, WZ,et al. Catalytic hydrodechlorination of 2,4,4 '-trichloro-2 '-hydroxydiphenylether under mild conditions[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2003,45(4):281-292.
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