Highly Active and Recyclable Metal Oxide Catalysts for the Prins Condensation of Biorenewable Feedstocks

被引：9

作者：

Costa, Vinicius V. ^{[2
]}

Bayahia, Hossein ^{[1
]}

Kozhevnikova, Elena F. ^{[1
]}

Gusevskaya, Elena V. ^{[2
]}

Kozhevnikov, Ivan V. ^{[1
]}

机构：

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

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

来源：

CHEMCATCHEM | 2014年 / 6卷 / 07期

关键词：

heterogeneous catalysis; metal oxides; mixed oxides; nopol; Prins condensation; HETEROPOLY ACID CATALYSTS; ONE-STEP SYNTHESIS; ALPHA-PINENE; FRAGRANCE COMPOUNDS; MIXED-OXIDE; ISOMERIZATION; NOPOL; BIOMASS;

D O I：

10.1002/cctc.201402160

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Metal oxides such as Nb2O5, Cr2O3, and especially a Zn-II-Cr-III mixed oxide are demonstrated to be highly active and recyclable heterogeneous catalysts for Prins condensation, which provides a clean, high-yielding route for the synthesis of nopol through the condensation of biorenewable beta-pinene with paraformaldehyde. Zn-Cr mixed oxide with an optimum Zn/Cr atomic ratio of 1: 6 gave 100% nopol selectivity at 97% beta-pinene conversion, with the catalyst easily recovered and recycled. The acid properties of Nb2O5 and Zn-Cr mixed oxide were characterized by the diffuse reflectance IR Fourier transform spectroscopy of adsorbed pyridine and ammonia adsorption microcalorimetry. An appropriate combination of acid-base properties of Zn-Cr mixed oxide is believed to be responsible for its efficiency.

引用

页码：2134 / 2139

页数：6

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