Enhanced activity of polymer-supported phase transfer catalysts

Desikan, Sridhar ; Doraiswamy, L. K. (2000) Enhanced activity of polymer-supported phase transfer catalysts Chemical Engineering Science, 55 (24). pp. 6119-6127. ISSN 0009-2509

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00092...

Related URL: http://dx.doi.org/10.1016/S0009-2509(00)00221-9


Phase transfer catalysis has been a weapon in the arsenal of synthetic organic chemists for over three decades now. While phase transfer catalysts (PTCs) have found widespread use in the industry, the polymer-supported phase transfer catalysts, also known as triphase catalysts, have not gained industrial acceptance. Triphase catalysts offer many advantages associated with heterogeneous catalysts such as easy separation from the reaction mixture, reusability, and use in continuous reactors. These significant advantages notwithstanding, the main reason for the lack of interest in the industry for the use of triphase catalysts has been its reduced activity in comparison with soluble-phase transfer catalysts. Due to their heterogeneous nature, triphase catalysts, in general, have lower reactivity. In this paper, we address this issue of reduced activity of triphase catalysts for a specific reaction, that is, phase transfer esterification of benzyl chloride with aqueous sodium acetate. It has been found that the triphase catalyst has a higher reactivity than its soluble analogs. The kinetics of the phase transfer reaction using both soluble and polymer-supported catalysts has been determined and the results are presented.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Triphase Catalysis; Phase Transfer Catalysis; Rate Enhancement; Polymer-supported PTC; Organic Synthesis; Benzyl Chloride Esterification
ID Code:22863
Deposited On:25 Nov 2010 13:56
Last Modified:31 May 2011 04:42

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