Formylation with supercritical carbon dioxide over Ru/Al2O3 modified by phosphines:: heterogeneous or homogeneous catalysis?

被引：18

作者：

Rohr, M ^{[1
]}

Grunwaldt, JD ^{[1
]}

Baiker, A ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, ETH Honggerberg, Dept Chem & Appl Biosci, CH-8093 Zurich, Switzerland

来源：

JOURNAL OF CATALYSIS | 2005年 / 229卷 / 01期

关键词：

formylation of amines; 3-methoxypropylamine; supercritical carbon dioxide; Ru/Al2O3; phosphines; X-ray absorption spectroscopy; EXAFS; in situ spectroscopy;

D O I：

10.1016/j.jcat.2004.09.026

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The formylation of 3-methoxypropylamine with hydrogen and "supercritical" carbon dioxide over Ru-based catalysts was studied. In this solventless process, carbon dioxide acts as both reactant and solvent. Interestingly, Ru/Al2O3 modified by the phosphine 1,2-bis(diphenylphosphino)ethane (dppe) showed a high formylation activity at 100% selectivity, comparable to those of the homogeneous catalysts RuCl2(dppe)(2) and RuCl2(PPh3)(3). Analysis of the reaction mixture by ICP-OES and structural studies by in situ X-ray absorption spectroscopy discovered that the presence of the phosphine modifier led to the formation of a homogeneous ruthenium catalyst. (C) 2004 Elsevier Inc. All rights reserved.

引用

页码：144 / 153

页数：10

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