Phosphotungstic heteropoly acid as efficient heterogeneous catalyst for solvent-free isomerization of α-pinene and longifolene

被引：56

作者：

da Silva Rocha, Kelly A. ^{[1
]}

Robles-Dutenhefner, Patricia A. ^{[1
]}

Kozhevnikov, Ivan V. ^{[2
]}

Gusevskaya, Elena V. ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Quim, BR-31270901 Belo Horizonte, MG, Brazil

[2] Univ Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, England

来源：

APPLIED CATALYSIS A-GENERAL | 2009年 / 352卷 / 1-2期

基金：

英国工程与自然科学研究理事会;

关键词：

Isomerization; Terpenes; Acid catalysis; Heteropoly acid; ACETOXYLATION; CONVERSION; HYDRATION; MONTMORILLONITE; ZEOLITES; CAMPHENE; ALUMINUM;

D O I：

10.1016/j.apcata.2008.10.005

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：

Silica-supported H3PW12O40 (PW) the strongest heteropoly acid in the Keggin series, is an efficient, environmentally friendly heterogeneous catalyst for the liquid-phase isomerization of alpha-pinene and longifolene into their more valuable isomers - camphene and isolongifolene, respectively, which are intermediates in the synthesis of expensive fragrances. The reactions occur under solvent-free conditions in the temperature range of 80-100 degrees C, with low catalyst loadings (0.15-5 wt%) and high turnover numbers (up to 6000 per proton). The catalyst can be easily recovered and reused. No PW leaching is observed in the reaction system. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：188 / 192

页数：5

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