期刊
JOURNAL OF MEMBRANE SCIENCE
卷 201, 期 1-2, 页码 65-75出版社
ELSEVIER
DOI: 10.1016/S0376-7388(01)00704-9
关键词
solvent resistant nanofiltration; phase transfer catalysis; homogeneous catalyst
This paper explores the use of nanofiltration (NF) membranes in phase transfer catalysis for separating the catalyst and product present in the post-reaction mixture and recycling the catalyst. The conversion of bromoheptane into iodoheptane with toluene as solvent, using an aqueous solution of potassium iodide, and catalysed by tetraoctylammonium bromide as the phase transfer catalyst, was employed as a model reaction. A range of NF membranes from commercial manufacturers were evaluated in terms of membrane stability, solvent and product permeation rates, and catalyst rejection. The best performance resulted in a catalyst rejection of >99% and a solvent flux of >101 m(-2) h(-1), with negligible product rejection. The catalyst was 100% recycled and re-used in subsequent reactions. No loss in catalyst activity was observed over a cycle of three consecutive reactions. (C) 2002 Elsevier Science B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据