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    • 1. 发明申请
    • METHOD FOR ISOLATING AMINES FROM AQUEOUS SOLUTIONS
    • 从水溶液中分离氨的方法
    • US20050000790A1
    • 2005-01-06
    • US10494042
    • 2002-11-12
    • Karl BeckTorsten FreundBernd Gerber
    • Karl BeckTorsten FreundBernd Gerber
    • C07C209/84C07C209/86C07C211/03C07C211/08B01D3/42C07C51/44
    • C07C209/86C07C211/08
    • A process for the isolation of amines from aqueous solutions by continuous distillation of aqueous solutions of the amines by a two-pressure method of rectifying aqueous solutions of amines which form with water an azeotrop, the composition of which is pressure-dependent, in two columns at different pressures provided that: a) the pressure in the second column is set to a value at least 0.5 bar higher than in the first column, b) the aqueous amine solution is fed, as a side stream, to the first column, and water and portions which boil at a higher temperature than the amine or which are non-volatile are removed at the base of the column, c) a mixture of amine and water is withdrawn at the head of the first column and fed, as a side stream, to the second column, d) an azeotrope of water and amine is withdrawn at the head of the second column and recycled to the first column, and (e) the purified amine is discharged at the base of the second column.
    • 一种通过连续蒸馏胺水溶液的方法,该方法是通过双向压力的方法将胺的水溶液与水形成,其组成为压力依赖性的两个塔 在不同的压力下,条件是:a)将第二塔中的压力设定为比第一塔高至少0.5巴的值,b)将胺水溶液作为侧流进料至第一塔,以及 在塔的底部除去水和在比不挥发性更高的温度下沸腾的部分,c)在第一塔的头部取出胺和水的混合物,并将其作为侧 流到第二塔,d)在第二塔的头部取出水和胺的共沸物并循环到第一塔,和(e)纯化的胺在第二塔的底部排出。