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Bunte盐法制备巯基乙酸实验合成新方法

A New Way to Synthesize Mercaptoacetic Acid by Bunte Salt
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摘要 采用氯乙酸和碳酸钠反应生成氯乙酸钠,控制氯乙酸钠溶液PH值为8~9,在70—75℃下与等摩尔硫代硫酸钠反应生成Bunte盐,加入反应物重量10%的硫酸,控制温度为80~90℃,时间为80min进行酸化反应;再加入反应物重量2%的Zn粉在40~50℃下还原80min,得到粗产品;萃取、精馏后巯基乙酸纯度可达98.6%,收率可达到89.7%。 This article adopts chloroactic acid and sodium carbonate as materials to produce Sodium Chloroacetate , while adjusting pH of Sodium Chloroacetate solution to 8 -9 and temperature to 70 -75 ℃. Then sodium hyposulfite is added to produce Bunte Salt, and sulfuric acid about 10 percent of weight of reactants for acidification with the condition that the temperature is 80 - 90 ℃ and the time 80 minutes. After doing it , 2 percent of weight of reactants powder zinc is added for reduction with the condition that the temperature is 40 - 50 ℃ and the time 80 minutes. Rough products needs extraction and distillation. Finally product purity may reach to 98.6 percent and yield of the whole reaction may reach to 89.7 percent.
作者 赵若冬
出处 《兰州石化职业技术学院学报》 2006年第1期3-4,共2页 Journal of Lanzhou Petrochemical Polytechnic
关键词 巯基乙酸 Bunte盐 萃取 精馏 Mercaptoacetic acid Bunte Salt extraction distillation
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