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发明名称
间羟基二乙基苯胺的提纯工艺
摘要
本发明是一种高纯间羟基二乙基苯胺的提纯工艺,通过控制在精制罐中的间羟基二乙基苯胺的降温速率和范围,使物料在精制罐中以较纯的晶体析出,然后以一定的升温速率升温,使馏出物中间羟基二乙基苯胺含量呈级差上升,分级排放所需产物,从而得到纯度大于等于99.5%的间羟基二乙基苯胺。本发明具有产品纯度高、损耗少和无“三废”污染的优点,解决了精馏与吸附提纯工艺的单耗高、产品质量不稳定以及有“三废”排放等存在的问题。
申请公布号
CN1158332A
申请公布日期
1997.09.03
申请号
CN96116259.7
申请日期
1996.02.26
申请人
蔡宪元
发明人
蔡宪元;钱晓阳;马海麟
分类号
C07C215/76;C07C213/10
主分类号
C07C215/76
代理机构
代理人
主权项
1.一种间羟基二乙基苯胺的提纯工艺,其特征在于将100份重量的含量至少为80%(重量)的熔融间羟基二乙基苯胺加至精制罐中,快速地在30分钟内冷却至物料的熔点以上1~2℃,然后按降温速率进行降温,降温结束后,再按升温速率升温至物料的熔点之上10℃,分级排放物料,得到至多20份重量的低于进料含量的间羟基二乙基苯胺,30~35份重量的等于进料含量的间羟基二乙基苯胺以及至少50份重量的大于进料含量的间羟基二乙基苯胺。
地址
200031上海市淮海中路1350弄12号
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