| 对甲苯甲腈合成工艺改进 |
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| 引用本文： | 易兵,汤正平,林原斌. 对甲苯甲腈合成工艺改进[J]. 染料与染色, 2001, 38(3): 37-38 |
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| 作者姓名： | 易兵 汤正平 林原斌 |
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| 作者单位： | 1. 湘潭机电高等专科学校,湘潭,411101
2. 湘潭大学化学化工学院,湘潭,411105 |
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| 摘 要： | 本文报道了对甲苯甲酸与尿素反应,进行直接氰化将羧基转变成氰基生成对甲苯甲腈的情况,改进了对甲苯甲酸直接氰化的工艺条件。当对甲苯甲酸与尿素的摩尔比为1:1.6,采用分段保温的加热方式,产品收率达75.6％。对未反应完全的原料、中间体及反应中使用的溶剂进行了回收和循环利用。
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| 关 键 词： | 对甲苯甲酸 尿素 氰化 |
| 修稿时间： | 2000-08-01 |
An Improved Technology for Preparing p-Tolunitrile |
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| Yi Bing,Tang Zhengping,Lin Yuanbin. An Improved Technology for Preparing p-Tolunitrile[J]. Ranliao yu Ranse, 2001, 38(3): 37-38 |
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| Authors: | Yi Bing Tang Zhengping Lin Yuanbin |
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| Affiliation: | Yi Bing[1] Tang Zhengping [1] Lin Yuanbin [2] |
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| Abstract: | By direct cyanidation, the reaction of p-toluic acid with urea would convert the carboxyl group to cyano group to give p - tolunitrile. The improved conditions were: mol ratio of p - toluic acid to urea was 1:16, employing a sectional heating and temperature maintenance technique. The yield was 75. 6% . The unreacted raw materials, intermediate products and solvent could be recovered and recycled. No severe environmental pollution problem encountered. |
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| Keywords: | p - toluic acid urea cyanidation |
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