The effect of water on the hydrogenation of o-chloronitrobenzene in ethanol, n-heptane and compressed carbon dioxide

	The effect of water on the hydrogenation of o-chloronitrobenzene in ethanol, n-heptane and compressed carbon dioxide
	Cheng HY ; Meng XC ; Yu YC ; Zhao FY
刊名	applied catalysis a-general
	2013
卷号	455 页码:8-15
关键词	PHOSPHINE COMPLEX CATALYSTS LIQUID PHASE HYDROGENATION AROMATIC NITRO-COMPOUNDS SELECTIVE HYDROGENATION MOLECULAR-INTERACTIONS PLATINUM CATALYST SUPERCRITICAL FLUIDS ORGANIC-CHEMISTRY METAL CATALYSTS CINNAMALDEHYDE
ISSN号	0926-860x
通讯作者	zhao fy
中文摘要	water as a clean solvent and promoter in the organic synthesis have attracted more attention, herein the effect of water was studied for the hydrogenation of o-chloronitrobenzene (o-cnb) over pt/c and pd/c catalysts in ethanol, n-heptane and compressed co2. very interesting, the reaction rate decreased in ethanol, but increased in n-heptane and compressed co2 with the addition of water. the role of water in the reaction was mainly discussed from the experimental data and phase behavior analysis, one is to activate the functional group of no2 through the interactions via a hydrogen bonding, and the other is to affect the solubility of hydrogen in ethanol and n-heptane. the positive effect of the interaction between water and reactants may be counteracted by the negative effect of hydrogen solubility in ethanol. however, the concentration of o-cnb and hydrogen changed slightly in n-heptane with the addition of water, so the interaction of water with reactants may play a main role in improving the tof. the combination of h2o and co2 is more efficient than the pure h2o, co2 and h2o-n-heptane systems. the phase behavior may play important role also for the improved activity except for the interactions of h2o and co2 with the reactants. o-cnb phase was expanded in the compressed co2 and so the concentration of h-2 in o-cnb phase increased due to the miscible of co2 and h-2, resulting in the enhancement of reaction rate and the maximum conversion at pressure of 9 mpa co2, at which the volume was expanded to the largest one. the similar results were also obtained in the compressed co2 system without h2o. in addition, the stability of pt/c and pd/c was studied in h2o-n-heptane and h2o-co2. as a result, the h2o-co2 media and pt/c catalyst is one of the most effective systems for the hydrogenation of o-cnb. (c) 2013 elsevier b.v. all rights reserved.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000318391500002
公开日期	2014-04-16
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/49959]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Cheng HY,Meng XC,Yu YC,et al. The effect of water on the hydrogenation of o-chloronitrobenzene in ethanol, n-heptane and compressed carbon dioxide[J]. applied catalysis a-general,2013,455:8-15.
APA	Cheng HY,Meng XC,Yu YC,&Zhao FY.(2013).The effect of water on the hydrogenation of o-chloronitrobenzene in ethanol, n-heptane and compressed carbon dioxide.applied catalysis a-general,455,8-15.
MLA	Cheng HY,et al."The effect of water on the hydrogenation of o-chloronitrobenzene in ethanol, n-heptane and compressed carbon dioxide".applied catalysis a-general 455(2013):8-15.