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发明名称
一种苯肼盐酸盐的制备方法
摘要
本发明公开了一种苯肼盐酸盐的制备方法,其特征是取盐酸、亚硝酸钠依次加入苯胺中,其中苯胺、盐酸、亚硝酸钠摩尔比为1∶2.3~3.2∶1~1.1,且亚硝酸钠在0~5℃时开始投料,反应温度为0~22℃,反应时间为30~90分钟,再按与苯胺的摩尔比为1∶2~3.5∶2.5~3.0加入亚硫酸铵、盐酸,进行还原、水解、酸析,再经抽滤或甩干,即可,其优点是反应速度快,操作时间短,氯化重氮苯的收率高,生产成本低且设备投资小。$
申请公布号
CN1086382C
申请公布日期
2002.06.19
申请号
CN96115395.4
申请日期
1996.06.20
申请人
张海林
发明人
张海林
分类号
C07C243/22;C07C241/02
主分类号
C07C243/22
代理机构
代理人
主权项
1、一种苯肼盐酸盐的制备方法,其特征在于,取盐酸、亚硝酸钠依次加入苯胺中,其中苯胺、盐酸、亚硝酸钠的摩尔比为1∶2.3~3.2∶1~1.1,且亚硝酸钠在0~5℃时开始加入,反应温度为0~22℃,反应时间为30~90分钟,再按与苯胺的摩尔比为1∶2~3.5∶2.5~3.0加入亚硫酸铵、盐酸,进行还原、水解、酸析,再经抽滤或甩干,即制得苯肼盐酸盐。
地址
121000辽宁省锦州市凌河区云飞路二段四十号
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