第 33 卷第 2 期Vol. 33 No. 2
2003 年 4 月Apr 2003

所属栏目:其它

硫氢化钠法常压合成巯基乙酸
刘广义; 钟宏(中南大学化学化工学院; 湖南长沙; 410083)
摘 要:研究了以硫氢化钠和氯乙酸钠为原料常压合成巯基乙酸。适宜工艺条件为 :硫氢化钠溶液 pH值在 9左右 ,浓度为 0 65~ 0 70mol·L- 1,相应的氯乙酸钠溶液浓度为 2 0~ 1 5mol·L- 1,氯乙酸钠和硫氢化钠配比为 1∶1 3(mol) ,反应温度为 5 5± 1℃ ,反应时间为 12min ,巯基乙酸的收率为 82 %~ 87%。
关键词:巯基乙酸; 硫氢化钠; 常压
中图分类号:TQ225.12+2  文献标识码:A  文章编号:1009-9212(2003)02-0009-02
The Synthesis of Thioglycolic Acid with Sodium Hydrosulphide under Common Pressure
LIU Guang-yi etc.(Institute of Chemistry and Chemical Engineerint; Central South University; Changsha Hunan; 410083; China)
Abstract:Thioglycolic acid(TGA) was synthesized from thioglycolic acid and sodium hydrosulfide under common pressure.The conversion ratio of TGA can get 82%~87% under such optimal conditions as the pH 9.0 in 0.65~0.70?mol·L -1 NaHS solution, corresponding to 2.0~2.5?mol·L -1 ClCH 2COONa solution, the reaction temperature 55±1?℃, the time 12?min, and the molecular ratio of ClCH 2COONa/NaHS 1∶1.3.
Key words:thioglycolic acid; sodium hydrosulfide; common pressure
收稿日期:2002-08-16
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