二氧化钛负载磷钨杂多酸催化合成苹果酯-B |
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引用本文: | 吕宝兰,胡婷婷,杨水金.二氧化钛负载磷钨杂多酸催化合成苹果酯-B[J].化工中间体,2007(7):4-6. |
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作者姓名: | 吕宝兰 胡婷婷 杨水金 |
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作者单位: | 湖北师范学院,化学与环境工程系,黄石,435002 |
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基金项目: | 湖北省教育厅科研项目
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湖北省教育厅教研基金 |
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摘 要: | 以自制二氧化钛负载磷钨杂多酸H3PW2O40/TiO2为多相催化剂,以乙酰乙酸乙酯和1,2-丙二醇为原料合成苹果酯一B,研究了原料摩尔比、催化剂用量、反应时间诸因素对产品收率的影响。实验表明:适宜反应条件为n(乙酰乙酸乙酯):n(1,2-丙二醇)=1:1.4,催化剂用量为反应物料总质量的0.8%,环己烷为带水剂,反应时间1.0h。上述条件下,苹果酯-B的收率为76.3%。
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关 键 词: | 苹果酯-B 二氧化钛负载磷钨杂多酸 催化 |
文章编号: | 1006-253x(2007)07-004-3 |
修稿时间: | 2007-04-16 |
Synthesis of Ethyl Acetoacetate 1,2-Propanediol Ketal by Using H3PW12O40/TiO2 as Catalyst |
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Authors: | LU Bao-lan HU Ting-ting YANG Shui-jin |
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Affiliation: | Department of Chemistry and Environmental Engineering, Hubei Normal University, Huangshi 435002, Hubei, China |
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Abstract: | A new environmental friendly catalyst, phosphotungstic acid on active TiO2 (H3PW12O40/TiO2) was prepared. Ethyl acetoacetate 1,2-propanediol ketal (Ⅰ) was synthesized from ethyl acetoacetate (Ⅱ) and 1,2-propylene glycol (Ⅲ) in the presence of H3PW2O40/TiO2 (Ⅳ). Factors influencing the product yield were discussed and the best reaction conditions were found. Experimental result showed that IV is an excellent catalyst. With n(Ⅱ):n(Ⅲ)=1.0:1.4, w (Ⅳ)=0.8%, and reaction time=1.0h, yield of ( Ⅰ ) can reach 76.3%. |
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Keywords: | ethyl acetoacetate 1 2-propanediol ketal phosphotungstic acid on active TiO2 catalysis |
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