第 37 卷第 6 期 | | Vol. 37 No. 6 | 2007 年 12 月 | Dec 2007 |
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所属栏目:功能材料
磺酸树脂催化合成尼泊金酯的研究 |
曾立华,李其华,雷春华,尹笃林
(湖南师范大学 化学化工学院,湖南 长沙 410081) |
摘 要:以对羟基苯甲酸(PHBA)和丁醇为原料,用磺酸树脂作催化剂,催化合成了尼泊金丁酯,优化反应条件为:n(丁醇) ∶ n(对羟基苯甲酸)=5 ∶ 1,催化剂磺酸树脂的用量为对羟基苯甲酸质量的21%,反应温度为回流温度,反应时间为5 h。尼泊金丁酯收率可达82.6%,催化剂可重复使用,产品结构用红外光谱图进行了表征。该方法也适合于合成尼泊金戊酯。 |
关键词:尼泊金酯;磺酸树脂;催化 |
中图分类号:TQ225.24 文献标识码:A 文章编号:1009-9212(2007)06- 0062-03 |
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Synthesis of Parabens Catalyzed by Sulfoacid Resin |
ZENG Li-hua,LI Qi-hua,LEI Chun-hua,YIN Du-lin
(Colloge of Chemistry and Chemical Engineering, Hunan Normal Univeisity, Changsha 410081, China) |
Abstract:Butyl p-hydroxybenzoate was synthesized from p-hydroxybenzoic acid and butanol with sulfoacid resin as catalyst. The optimum conditions were as follow: ratio of n-butanol, p-hydroxybenzoic acid and sulfonic acid resin was 0.25 mol ∶ 0.05 mol ∶ 1.5 g, refluxing for 5 h using water separator at the reflow reaction temperature. Under the optimal conditions, the yield of butyl p-hydroxybenzoate reached 82.6%. These products were characterized by measuring melting point and IR. The method was also propitious to synthesize amyl p -hydroxybenzoate. |
Key words:parabens;sulfoacid resin;catalysis |
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作者简介:曾立华(1964-),女,湖南益阳人,副教授, 硕士研究生,研究方向:有机化学。(E-mail: lihuazeng222@126.com)
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收稿日期:2007-11-06
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