摘要
本文详细研究了用重氮化方法制备2,6-二氯苯甲腈的方法,分别考察了硫酸与醋酸配比、氰化介质酸碱性、氰代分解温度对收率的影响,并对废水处理进行了考察。确定了n(硫酸)∶n(醋酸)=3 4∶1～1∶1之间,氰代温度50℃,氰代反应介质pH值7～9的最佳条件,同时找到了一条处理含氰络合物废水的方法,使CuCN循环,而且处理后废水低于国家排放标准。
2,6-Dichlorobenzonitrile was synthesized from 2,6-dichloroaniline by diazo reaction.Effects of reaction temperature,ratio of H_2SO_4 to CH_3COOH and pH value on the yield and purity of product were studied.The highest yield of 2,6-dichlorobenzonitrile was obtained under the conditions that n(H_2SO_4)∶n(CH_3COOH)=34∶1～1∶1,reaction temperature was 50℃ and the pH was between 7～9.After processed,the quality of cyanide waste-water was up to the emission standard.
出处
《化学工业与工程》
CAS
2004年第2期87-90,共4页
Chemical Industry and Engineering
关键词
2
6-二氯苯甲腈
2
6-二氯苯胺
重氮化
2,6-dichlorobenzonitrile
2,6-dichloroaniline
sandmeyer diazo reaction
