| 固体酸催化剂Ga2(SO4)3/硅胶催化合成尼泊金庚酯 |
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| 引用本文： | 何建英,王强,史利勇,陈丹云. 固体酸催化剂Ga2(SO4)3/硅胶催化合成尼泊金庚酯[J]. 化学世界, 2011, 52(9): 547-549 |
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| 作者姓名： | 何建英 王强 史利勇 陈丹云 |
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| 作者单位： | 1. 河南大学化学化工学院精细化学与工程研究所,河南开封,475004
2. 洛阳理工学院环境工程与化学系,河南洛阳,471000 |
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| 基金项目： | 河南省教育厅自然科学研究计划项目(2008A150002) |
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| 摘 要： | 采用自制的固体酸催化剂硅胶固载硫酸镓非均相催化合成了防腐剂尼泊金庚酯,考察了催化剂用量、醇酸物质的量比、回流反应时间、带水剂种类及催化剂重复使用性等因素对酯收率的影响.适宜反应条件为:对羟基苯甲酸0.05 mol,醇酸物质的量比5∶1,催化剂2.0g,环己烷10mL,反应时间5h,尼泊金庚酯收率达94.7％.该催化剂活...
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| 关 键 词： | 尼泊金庚酯 固体酸催化剂 硅胶固载硫酸镓 催化 合成 |
Synthesis of n-Heptyl p-Hydroxybenzoate Catalyzed by Gallium Sulfate Supported on Silica Gel |
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| HE Jian-ying,WANG Qiang,SHI Li-yong,CHEN Dan-yun. Synthesis of n-Heptyl p-Hydroxybenzoate Catalyzed by Gallium Sulfate Supported on Silica Gel[J]. Chemical World, 2011, 52(9): 547-549 |
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| Authors: | HE Jian-ying WANG Qiang SHI Li-yong CHEN Dan-yun |
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| Affiliation: | HE Jian-ying1,WANG Qiang2,SHI Li-yong1,CHEN Dan-yun1(1.Chemistry and Chemical Engineering College of Henan University,Institute of Fine Chemistry and Engineering,Henan Kaifeng 475004,China,2.Department of Chemistry and Environmental Engineering of Luoyang Engineering College,Henan Luoyang 471000,China) |
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| Abstract: | A novel solid acid catalyst made from gallium sulfate supported on silica gel was prepared using impregnation and calcination technique.It was employed as a heterogeneous catalyst to promote the esterification reaction of p-hydroxybenzoic acid and heptanol to form n-heptyl p-hydroxybenzoate.The influences of reaction conditions on catalytic performance were studied.The optimum reaction conditions were: p-hydroxybenzoic acid was 0.05 mol;molar ratio of alcohol to acid was 5∶1;the catalyst was 2.0 g;cyclohexane was 10 mL and reaction time 5 h.The ester yield reached 94.7%,and it was above 83% after being reused for five times. |
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| Keywords: | n-heptyl p-hydroxybenzoate solid acid catalyst gallium sulfate supported on silica gel catalysis synthesis |
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