| 硫酸氢钠催化合成混合二元酸二甲酯的工艺改进 |
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| 引用本文： | 赵献增,李天仚,王冬梅,张文楠,张彦昌.硫酸氢钠催化合成混合二元酸二甲酯的工艺改进[J].河南科学,2011,29(7):789-791. |
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| 作者姓名： | 赵献增 李天仚 王冬梅 张文楠 张彦昌 |
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| 作者单位： | 河南省精细化工重点实验室,郑州,450002 |
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| 摘 要： | 以混合二元酸和甲醇为原料,硫酸氢钠为催化剂,采用多次酯化的方法,合成了混合二元酸二甲酯.最佳工艺条件为:催化剂硫酸氢钠用量,30 g/mol混合酸；3次重复酯化,酯化温度,80～84℃；时间3 h；第一次酯化醇酸量的比为3.3∶1,第二次酯化醇酸量的比为1.6∶1,第三次酯化醇酸量的比为1.25∶1.在此条件下,混合二...
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| 关 键 词： | 混合二元酸二甲酯 硫酸氢钠 催化酯化 |
Improved Technology of Mixed Dibasic Acid Dimethyi Esters Catalyzed by Sodium Bisulfate |
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| Zhao Xianzeng,Li Tianxian,Wang Dongmei,Zhang Wennan,Zhang Yanchang.Improved Technology of Mixed Dibasic Acid Dimethyi Esters Catalyzed by Sodium Bisulfate[J].Henan Science,2011,29(7):789-791. |
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| Authors: | Zhao Xianzeng Li Tianxian Wang Dongmei Zhang Wennan Zhang Yanchang |
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| Institution: | (Henan Key Laboratory of Fine Chemicals,Zhengzhou 450002,China) |
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| Abstract: | Mixed dibasic acid dimethyl esters（DBE） were synthesized by mixed dibasic acid（DBA） and methanol catalyzed by sodium bisulfate.Optimal conditions are found as follows：amount of catalyst is 30 g/mol DBA;Esterifying temperature is 80～84 ℃;reaction time 180 min;molar ratio of alcohol to acid of first esterifying is 3.3∶1,molar ratio of alcohol to acid of second esterifying is 1.6∶1,molar ratio of alcohol to acid of third esterifying is 1.25∶1.The yield of DBE is 98.79 %,content of DBE is 98.04 %. |
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| Keywords: | mixed dibasic acid dimethyl esters sodium bisulfate catalysitic esterification |
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