CN1035943C - 一种巯基乙酸的制备方法 - Google Patents

一种巯基乙酸的制备方法 Download PDF

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CN1035943C
CN1035943C CN91103042A CN91103042A CN1035943C CN 1035943 C CN1035943 C CN 1035943C CN 91103042 A CN91103042 A CN 91103042A CN 91103042 A CN91103042 A CN 91103042A CN 1035943 C CN1035943 C CN 1035943C
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sulfide
sodium
sulfothiorine
acid
sodium thiosulfate
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CN1066652A (zh
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刘增方
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XI'AN NON-FERROUS METAL INST
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Abstract

本发明提出了一种制作巯基乙酸的新方法：在水中，使硫代硫酸钠和一氯乙酸钠反应生成羧甲基硫代硫酸钠，然后再与硫化物或硫氢化物反应，合成巯基乙酸。此法设备、工艺简单，污染小，产品造价较硫脲法低30%以上，可直接做为选矿药剂等使用。

Description

一种巯基乙酸的制备方法
本发明是一种化工产品巯基乙酸的制备新方法。
硫基乙酸及其衍生物，被广泛用做卷发剂、脱毛剂、选矿药剂、聚合物合成之添加剂等。目前，制作巯基乙酸主要有三种方法：一是硫脲法，此法设备简单、操作容易，但由于使用原料较贵，故产品成本较高；二是硫氢化钠法，该法用的原料便宜，故产品成本较低，但设备复杂，操作严格，且产生硫化氢污染；三是硫代硫酸钠法。1983年出版的《美国化学文摘》99：53146c，公开了一项与本发明相近的技术——苏联专利1014829号，该技术是：先将硫代硫酸钠和一氯乙酸钠放入水中，使该溶液在70～75℃下反应生成羧甲基硫代硫酸钠，然后冷却，向反应物中吹入氮气并注入硫酸，硫酸在反应混合物中的含量为20～24.5％，最后快速加热，使其在100～110℃下水解，便生成巯基乙酸。这种制作巯基乙酸的方法，价格低，设备简单，但工艺仍显得复杂，且由于产品溶液中含硫酸较多，腐蚀性较强，不宜直接做为选矿药剂等使用。
本发明的目的是为了克服上述硫代硫酸钠法生产巯基乙酸之不足，简化工艺，降低产品成本。
本发明是这样实现的：将硫代硫酸钠和一氯乙酸钠放入水中，反应生成羧甲基硫代硫酸钠后，再将其与硫化物或者硫氢化物进行化学反应便制得巯基乙酸。所用的硫化物可以是硫化钠、硫化钾、硫化铵；硫氢化物可以是硫氢化钠、硫氢化钾、硫氢化铵。
本发明制作巯基乙酸的方法，设备工艺简单，污染小，产品造价低，产品溶液为中性至强碱性，可直接做选矿药剂等使用。
下面是本发明的两个实施列：
实施例1，取147.6克硫代硫酸钠(Na2S2O3·5H2O)和140克41.2％的一氯乙酸钠溶液，放入烧杯，搅拌加热至70～75℃，在此温度下反应20分钟，生成羧甲基硫代硫酸钠。冷却后加入14.2％(克/毫升)的硫化钠溶液300毫升，反应20分钟，制得巯基乙酸43.70克，产率95.8％。
实施例2，取140克41.2％的一氯乙酸钠水溶液和147.6克硫代硫酸钠，放入烧杯中，搅拌加热至70～75℃，在此温度下反应20分钟，生成羧甲基硫代硫酸钠。冷却后加入30％(克/毫升)的硫氢化钠水溶液120毫升，反应20分钟，制得巯基乙酸44克，产率96.5％。

Claims (2)

1、一种巯基乙酸的制备方法，将硫代硫酸钠和一氯乙酸钠放入水中反应，生成羧甲基硫代硫酸钠，其特征在于使此生成物再与硫化物或硫氢化物反应，生成巯基乙酸。
2、按照权利要求1所说明的方法，其特征在于所说的硫化物是硫化钠、硫化钾、硫化铵，所说的硫氢化物是硫氢化钠、硫氢化钾、硫氢化铵。
CN91103042A 1991-05-14 1991-05-14 一种巯基乙酸的制备方法 Expired - Fee Related CN1035943C (zh)

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CN1035943C true CN1035943C (zh) 1997-09-24

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1049889C (zh) * 1996-05-15 2000-03-01 太原工业大学 联产二氯乙酸甲酯和巯基乙酸的方法
CN102229548B (zh) * 2011-05-16 2013-11-06 潍坊益华化工有限公司 一种巯基乙酸的生产方法
CN102584657B (zh) * 2011-12-27 2014-06-11 杭州海虹精细化工有限公司 一种过/硫化乙酸锌制备方法
CN104059003A (zh) * 2014-06-06 2014-09-24 湖北犇星化工有限责任公司 一种巯基乙酸水溶液的制备方法
CN104193658B (zh) * 2014-08-21 2016-12-07 湖南立新环保科技发展有限公司 一种巯基乙酸的制备方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53147026A (en) * 1977-05-25 1978-12-21 Denki Kagaku Kogyo Kk Continuous preparation of thioglycolic acid
US5023371A (en) * 1986-03-07 1991-06-11 W. R. Grace & Co.-Conn. Synthesis of thioglycolic acid

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53147026A (en) * 1977-05-25 1978-12-21 Denki Kagaku Kogyo Kk Continuous preparation of thioglycolic acid
US5023371A (en) * 1986-03-07 1991-06-11 W. R. Grace & Co.-Conn. Synthesis of thioglycolic acid

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
有机化工原料，第三卷P208-209 *

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