文献类型：期刊文献

英文题名：GC-MS analysis and reaction mechanism of the gas-phase amination of 2,6-diisopropylphenol

作者：Jiang, Ruixia[1,2]; Xie, Zaiku[1]; Zhang, Chengfang[2]; Chen, Qingling[1]

机构：[1]Shanghai Res Inst Petrochem Technol, Dept Catalyt & Phys Chem, Shanghai 201208, Peoples R China;[2]E China Univ Sci & Technol, Inst Chem Technol, Shanghai 200237, Peoples R China

年份：2004

卷号：210

期号：1-2

起止页码：79

外文期刊名：JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL

收录：;EI(收录号：2004068003342);WOS:【SCI-EXPANDED(收录号:WOS:000188740000010)】；

语种：英文

外文关键词：GC-MS analysis; reaction mechanism; gas-phase amination; 2,6-diisopropylaniline; 2,6-diisopropylphenol

摘要：The liquid product of the gas-phase amination of 2,6-diisopropylphenol (2,6-DIPP) to prepare 2,6-diisopropylaniline (2,6-DIPA) was analyzed using gas chromatography-mass spectrometry. Besides 2,6-DIPP and 2,6-DIPA, there are by-products such as water, 1,3-diisopropylbenzene, 2,6-diisopropylcyclohexamine in the liquid product, in which 2,6-diisopropylcyclohexamine is a major constitute by-product. The ratio of 2,6-diisopropylcyclohexamine to 2,6-DIPA is low when the reaction proceeds more completely at lower reaction space velocity, but this ratio increases when the reaction proceeds incompletely at higher space velocity. So that 2,6-diisopropylcyclohexamine is suggested to be the intermediate product of gas-phase amination of 2,6-DIPP. The reaction mechanism of gas-phase amination of 2,6-DIPP on the bifunctional palladium-lanthanum supported catalyst was proposed. This reaction was synergistically catalyzed by the Pd metal active sites that facilitated hydrogenation and dehydrogenation reactions and the acid sites on the catalyst support that accelerated isomerization and amination reactions. (C) 2003 Elsevier B.V. All rights reserved.