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    • 4. 发明授权
    • Process for making 2-aminoethyl ether
    • 制备2-氨基乙基醚的方法
    • US4568747A
    • 1986-02-04
    • US316613
    • 1981-10-30
    • Russell T. McFaddenWilliam P. Coker
    • Russell T. McFaddenWilliam P. Coker
    • C07D203/02C07D295/00
    • C07D203/02
    • The invention is a process for obtaining pure BAEE from the crude reaction mixture of H.sub.2 SO.sub.4 and monoethanolamine. It consists of five major operations, which are:1. Separation of 2-aminoethyl hydrogen sulfate (AEHS) from BAEE.2H.sub.2 SO.sub.4 by mixing the molten crude product with crushed ice and filtering out the resulting AEHS which precipitates;2. precisely neutralizing the acidity in the filtrate with alkali or alkaline earth hydroxides, NaOH to form Na.sub.2 SO.sub.4 and free BAEE;3. extracting the BAEE and small amounts of other amines from this neutralized solution with an alcohol solvent having limited solubility in water, such as n-butanol;4. concentrating the amine extract by precipitating the amines in a separate, liquid layer by saturating the extract with carbon dioxide gas; and5. obtaining pure BAEE from this concentrate by distillation (at atmospheric pressure through an efficient distillation column).
    • 本发明是从H2SO4和单乙醇胺的粗反应混合物中获得纯BAEE的方法。 它包括五个主要操作,它们是:1.通过将熔融的粗产物与碎冰混合并过滤出沉淀的所得AEHS,从BAEE.2H2SO4分离2-氨基乙基硫酸氢盐(AEHS)。 2.用碱金属或碱土金属氢氧化物精确中和滤液中的酸度,形成Na 2 SO 4和游离BAEE; 3.用具有在水中的溶解度有限的醇溶剂如正丁醇从该中和溶液中萃取出BAEE和少量其它胺; 4.通过用二氧化碳气体使提取物饱和,将胺沉淀在单独的液体层中来浓缩胺提取物; 和5.通过蒸馏(在大气压下通过有效的蒸馏塔)从该浓缩物中获得纯BAEE。