羧乙基硫代丁二酸的合成及其在皂洗中的应用

Synthesis of Carboxyethylthiosuccinic Acid and its Application in Soaping

介绍了羧乙基硫代丁二酸(CETSA)的制备工艺,研究了制备过程中,催化剂种类和溶剂种类对CETSA合成的影响,分析了CETSA作为酸性皂洗剂在活性染料染色皂洗中的应用。结果表明,CETSA最佳的制备条件是:α-巯基丙酸、丙烯酸甲酯和马来酸摩尔比3:1:1.采用自制催化剂WEA,以水为溶剂,在回流温度-5℃的条件下反应7 h后可制得收率为70%以上的CETSA。将CETSA应用于非连续染色织物的皂洗工艺中时,可省去弱酸洗步骤,将酸洗和皂洗两道程序合并一起,节约用水量,提高生产效率;将CETSA应用于梭织布长车连续皂洗工艺中,可代替传统的皂洗剂,降低皂洗工作液pH值,防止染料在碱性皂洗条件下发生的水解现象,提高皂洗后织物的色牢度。

This paper introduced the preparation procedure of carboxyethyhhiosuccinic acid（CETSA）, studied the influence of catalyst types and solvent types on CETSA synthesis, and used CETSA as acidic soaping agent in the reactive dyes soaping process. The results show that the optimum preparation procedure of CETSA is： maintain molar ration between ct-sulfhydryl propionic acid, methyl acrylate and maleic acid 3：1：1, use self-made catalyst WEA and water solvent under reflux temperatures -5 ~C for 7 hours, and then can obtain CETSA with 70% yield can be obtained. If use CETSA in discontinuous coloring soaping process, weak acidic washing process can be omitted, due to merge acidic washing and soaping processes together, water is saved and productivity is enhanced; if use CETSA in continuous coloring soaping process for woven fabric, it can replace tradition soaping agent, reduce pH value of soaping solution, avoid dyes hydrolysis under basic condition and improve fabric color fastness after soaping.