过程产物硫化氢还原硝基苯替代苯胺合成2-巯基苯并噻唑的初步探索 |
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引用本文: | 李敬华,黎振球,于光,宋玉叶.过程产物硫化氢还原硝基苯替代苯胺合成2-巯基苯并噻唑的初步探索[J].青岛科技大学学报,2009,30(5):387-390. |
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作者姓名: | 李敬华 黎振球 于光 宋玉叶 |
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作者单位: | 青岛科技大学,化工学院,山东,青岛,266042 |
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摘 要: | 尝试用苯胺法合成橡胶促进剂2-巯基苯并噻唑的副产物硫化氢还原硝基苯得到苯胺,产物苯胺不经分离直接与二硫化碳、硫磺合成2-巯基苯并噻唑,硫化氢在整个体系中循环利用,还原产物单质硫又作为生产2-巯基苯并噻唑的原料。实验还原反应条件为,温度80~100℃,反应时间3~4 h,在一定压力下,硫化氢可以将硝基苯部分还原成苯胺,经检测分析知苯胺的最高收率可达6.619%。在还原后产物中直接加入溶硫液制得2-巯基苯并噻唑。该法提供了一种新的低成本、环保的2-巯基苯并噻唑的生产方法。
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关 键 词: | 硫化氢 硝基苯 苯胺 2-巯基苯并噻唑 |
Synthesis of 2-Mercaptobenzothiazole Using Nitrobenzene and H2S as Starting Materials |
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Abstract: | H2S which was the by-product from 2-mercaptobenzothiazole synthesis process reacted with nitrobenzene to prepare aniline and the obtained aniline was directly used to synthesize 2-mercaptobenzothiazole.The sulfur obtained from reduction process was used as material for synthesizing 2-mercaptobenzothiazole.That is to say the by-products H2S and sulfur could be utilized circularly.Under the conditions of 80~100 ℃,certain pressure and 3~4 h,the yield of aniline could reach 6.619%.The feasibility of experiment was done by adding sulfur dissolved in carbon disulfide could be directly added to the reduction mixture to prepare 2-mercaptobenzothiazole.A new clean synthesis method of 2-mercaptobenzothiazole with lower cost is explored. |
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Keywords: | hydrogen sulfide nitrobenzene aniline 2-mercaptobenzothiazole |
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