| 稀土固体超强酸催化合成庚酸丁酯 |
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| 引用本文： | 林进,赵汝琪,刘丽. 稀土固体超强酸催化合成庚酸丁酯[J]. 化学研究与应用, 2001, 13(1): 70-72 |
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| 作者姓名： | 林进 赵汝琪 刘丽 |
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| 作者单位： | 河北师范大学化学系, |
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| 基金项目： | 河北省自然科学基金资助项目!(2 95 10 8)，河北师范大学青年科研基金资助项目!(2 0 3 0 0 2 ) |
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| 摘 要： | 庚酸丁酯是无色液体 ,具有生苹果香味。主要用以配制苹果型香精 ,是我国 GB2 760— 86规定允许使用的食用香料 ,也可用于有机合成和用作溶剂。通常它是在硫酸催化下由庚酸和正丁醇酯化反应而得[1] 。硫酸虽然活性高 ,价廉 ,但选择性差 ,产品质量不好 ,设备腐蚀严重 ,同时产生大量废液 ,污染环境。为此 ,本实验选用稀土固体超强酸 SO2 - 4/ Ti O2 / La3+作为催化剂进行庚酸与正丁醇的酯化反应。固体超强酸是比 1 0 0 %的硫酸更强的酸 ,即H0 <-1 1 .94的酸[2 ] 。在某些有机催化反应中 ,固体超强酸显示出非常高的催化活性 ,具有不怕水、耐…
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| 关 键 词： | 稀土固体超强酸 庚酸丁酯 催化合成 酯化率 |
| 文章编号： | 1004-1656(2001)01-0070-03 |
| 修稿时间： | 2000-01-01 |
THE CATALYTIC SYNTHESIS OF BUTYL HEPTANOATE BY SO2-4/TiO2/La3+ RARE-EARTH SOLID SUPERACID |
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| LIN Jin,ZHAO Ru qi,LIU Li. THE CATALYTIC SYNTHESIS OF BUTYL HEPTANOATE BY SO2-4/TiO2/La3+ RARE-EARTH SOLID SUPERACID[J]. Chemical Research and Application, 2001, 13(1): 70-72 |
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| Authors: | LIN Jin ZHAO Ru qi LIU Li |
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| Abstract: | The synthesis of butyl heptanoate with n-butanol and heptanoicacid as reactants and the rare-earth solid super acid SO2-4/TiO2/La3+ as catalyst had been sutdied.The effects of various actors on the reaction were investigated.The results showed that the appropriate conditions should be:Weight of catalyst is 0.5g(weight of heptanoic acid is 0.2mol);molar ratio of n-butanol to heptanoic acid was 1.8∶1;reaction time was 2.0h;dehydrating agent (Toluene) being 15ml.The yield of butyl heptanoate was about 99.2%. |
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| Keywords: | rare earth solid super acid butyl heptanoate catalysis synthesis |
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