HYDRATION AND ACETYLATION OF LIMONENE. SUPPORTED HETEROPOLYACIDS
HYDRATION AND ACETYLATION OF LIMONENE. SUPPORTED HETEROPOLYACIDS
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DOI：
10.4067/s0717-97072008000100027
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发表时间：
2008-03
影响因子：
1.6
通讯作者：
M. Avila;N. Comelli;N. Firpo;E. Ponzi;M. Ponzi
中科院分区：
文献类型：
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作者：
M. Avila;N. Comelli;N. Firpo;E. Ponzi;M. Ponzi
研究了以二氧化硅和二氧化钛为载体的磷钨酸和磷钼酸催化柠檬烯水合和乙酰化反应。反应在间歇反应器中在乙酸中在40 ° C下进行，同时磁力搅拌反应混合物。通过气相色谱法分析反应产物，使用FID检测器，使用毛细管柱分离产物。用模式萜和气相色谱-质谱法鉴定化合物。所有催化剂在柠檬烯的水合和乙酰化反应中都有活性。基于磷钨酸（HPW）的催化剂比磷钼酸（HPMo）催化剂产生更大量的水合和乙酰化产物。当反应时间增加时，水合产物比异构化产物增加更快。用FTIR确定了杂多酸的结构和酸中心Bronsted和刘易斯的存在。关键词：水合，乙酰化，柠檬烯，杂多酸，α-松油醇
The limonene hydration and acetylation in liquid phase catalyzed by phosphotungstic and phosphomolybdic acid bulk and supported on silica and titanium dioxide were studied. The reaction was performed in a batch reactor in acetic acid at 40oC, with magnetic stirring of the reaction mixture. Reaction products were analyzed by gaseous chromatography with FID detector using a capillary column for separation of products. The identification of compounds was made with pattern terpenes and by gaseous chromatography with mass spectrometry. All catalysts tested result to be active in the hydration and acetylation reaction of limonene. Catalysts based on phophotungstic acid (HPW) produce larger amount of hydration and acetylation products than phosphomolybdic acid (HPMo) catalyst. Hydration products increase faster than isomerization products when the reaction time is increased. The structure of heteropolyacids and the presence of acid sites Bronsted and Lewis were determined by FTIR. Keyword: Hydration, acetylation, limonene, heteropolyacids, α-terpineol