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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:

期数:

2002年02期

页码:

17-18

栏目:

出版日期:

2002-06-25

文章信息/Info

Title:

The Study of Synthesis of Hydroxyacetic Acid

作者:

杨晓辉¹ ;  彭银仙²

1.南京无线电工业学校, 江苏南京210000 ;2.华东船舶工业学院, 江苏镇江212000

Author(s):

YANG Xiao -hui ¹ ;  PENG Yin -xian ²

1 .Nanjing Radio Indust ry School , Nanjing 210000 , China

关键词:

控制; 羟基乙酸; 合成

Keywords:

prohibitation ; hydroxyacetic acid ; reaction

分类号:

T Q 124.4

文献标志码:

A

摘要:

以氯乙酸为原料合成了羟基乙酸, 研究了多种反应条件下反应过程, 尤其对反应温度和氢氧化钠质量分数等条件进行了 筛选, 有效控制了聚合反应的进行, 同时使得氯乙酸原料中的杂质二氯乙酸反应成羟基乙酸, 经过提纯分离使最终羟基乙酸的 收率达95 %, 产品质量分数达98 %以上。

Abstract:

Hydroxy acetic acid w as sy nthesized by the hydroly sis of chloroacetic acid in the presence of aqueous NaOH .The ef fect of reaction temperature and concent ration of sodium hy droxide on the reaction w as investig ated .Under the optimum condition , side reactio ns , such as the condensation of acids and fo rmation of impurities, e .g .dichloroacetic acid , could be inhibited , the yield of hydroxyacetic acid reached above 95 %.The procedure is as follow s :the raw product f rom hydrolysis w as acidified ;the formed NaCl w as removed by filt ration ;the filter liquid w as mixed w ith acetone ;the fo rmed acetone solution containing hy droxyacetic acid was distilled ;acetone w as separated out .The product w ith purity of more than 98 %w as obtained throug h the vacuum distillation of the remainder .

备注/Memo

备注/Memo:

作者简介:杨晓辉(1962 -), 女, 江苏南京人, 硕士生。

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更新日期/Last Update: 2002-06-25