Vapor-phase reaction of polyols over copper catalysts
Vapor-phase reaction of polyols over copper catalysts
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DOI：
10.1016/j.apcata.2008.06.013
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发表时间：
2008-09-15
影响因子：
5.5
通讯作者：
Yokota, Masahiro
中科院分区：
文献类型：
--
作者：
Sato, Satoshi;Akiyama, Masaki;Yokota, Masahiro
在铜金属催化剂上进行了三元醇和二元醇的气相反应。三醇，如1，2，3-丙三醇（甘油）和1，2，3-和1，2，4-丁三醇，脱水得到相应的羟基酮，而1，2-丙二醇脱氢形成羟基丙酮。负载铜和纯铜金属是一种有效的催化剂，用于甘油在惰性条件下脱水生成羟基丙酮。然而，在氢气流中，铜催化羟基丙酮的氢化以及氢解以产生乙二醇。氧化铝负载的铜显示出最高的催化活性，在氮气环境压力和250 ℃下，羟基丙酮选择性>90 mol%。铜金属为甘油的脱水提供活性位点。我们提出了甘油脱水生成羟基丙酮的反应机理。(C)2008 Elsevier B. V.保留所有权利。
The vapor-phase reaction of triols and diols was performed over copper metal catalysts. Triols, such as 1,2,3-propanetriol (glycerol) and 1,2,3- and 1,2,4-butanetriols, were dehydrated to afford corresponding hydroxyketones, while 1,2-propanediol was dehydrogenated to form hydroxyacetone. Supported copper as well as pure copper metal was an effective catalyst for the dehydration of glycerol to produce hydroxyacetone under inert conditions. in hydrogen flow, however, copper catalyzed the hydrogenation of hydroxyacetone as well as hydrogenolysis to produce ethylene glycol. Alumina-supported copper showed the highest catalytic activity with hydroxyacetone selectivity of >90 mol% at ambient pressure of nitrogen and 250 degrees C. Copper metal provides an active site for the dehydration of glycerol. We propose a reaction mechanism for the dehydration of glycerol to form hydroxyacetone. (C) 2008 Elsevier B.V. All rights reserved.