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phase-transfer-catalysts
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Solvent-free efficient synthesis of symmetrical isocyanurates by a combination catalyst: Sodium saccharin and tetrabutylammonium iodide
, Article Monatshefte fur Chemie ; Volume 135, Issue 7 , 2004 , Pages 849-851 ; 00269247 (ISSN) ; Koozehgiri, G. R ; Dekamin, M. G ; Sharif University of Technology
2004
Abstract
Combination of sodium saccharin and tetrabutylammonium iodide as a novel anionic catalyst system promotes selectively the trimerization of isocyanates to give symmetrical isocyanurates under solvent-free conditions. © Springer-Verlag 2004
Simple and green oxidation of cyclohexene to adipic acid with an efficient and durable silica-functionalized ammonium tungstate catalyst
, Article Catalysis Communications ; Vol. 43 , 5 January , 2014 , pp. 169-172 ; Mahmoodi Hashemi, M ; Sharif University of Technology
Abstract
A novel silica-functionalized ammonium tungstate interphase catalyst has been reported as a non-nitric acid route for adipic acid production from one-pot oxidative cleavage of 30% hydrogen peroxide and catalytic amounts of p-toluenesulfonic acid (PTSA). The catalyst has been simply prepared by commercially available starting material. The structure of the catalyst has been investigated using FT-IR spectroscopy, atomic absorption, TEM, SEM and XRD analysis. The catalyst has shown good to high activity even up to 10 runs of reaction. Simple preparation of the catalyst, avoids using harmful phase transfer catalyst (PTC) and/or chlorinated additives are among the other benefits of this work