第 33 卷第 2 期 |  | Vol. 33 No. 2 | 2003 年 4 月 | Apr 2003 |
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所屬欄目:其它
硫氫化鈉法常壓合成巰基乙酸 |
劉廣義; 鐘宏(中南大學(xué)化學(xué)化工學(xué)院; 湖南長(cháng)沙; 410083) |
摘 要:研究了以硫氫化鈉和氯乙酸鈉為原料常壓合成巰基乙酸。適宜工藝條件為 :硫氫化鈉溶液 pH值在 9左右 ,濃度為 0 65~ 0 70mol·L- 1,相應的氯乙酸鈉溶液濃度為 2 0~ 1 5mol·L- 1,氯乙酸鈉和硫氫化鈉配比為 1∶1 3(mol) ,反應溫度為 5 5± 1℃ ,反應時(shí)間為 12min ,巰基乙酸的收率為 82 %~ 87%。 |
關(guān)鍵詞:巰基乙酸; 硫氫化鈉; 常壓 |
中圖分類(lèi)號:TQ225.12+2 文獻標識碼:A 文章編號:1009-9212(2003)02-0009-02 |
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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 |
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收稿日期:2002-08-16
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