公开(公告)号：US06171501B2

公开(公告)日：2001-01-09

申请号：US09214710

申请日：1999-03-10

申请人： Aharon Meir Eyal ,  Nadjda Cohen-Sydov

发明人： Aharon Meir Eyal ,  Nadjda Cohen-Sydov

IPC分类号： C07C22740

CPC分类号： C07C227/40

摘要： The invention provides a process for the separation of amino acids and their salts from impurities contained in an aqueous feed solution containing the same, the process comprising: a) bringing the feed solution into contact with a substantially immiscible extractant phase comprising an amine and an acid, both of which are substantially water immiscible in both free and salt forms, to extract amino acid and salts thereof in the phase, wherein the extraction is carried out while the feed solution is within two pH units of the initial pH of the feed solution; and b) backwashing the extractant phase with a substantially neutral aqueous system to recover substantially all of the extracted amino acid and the extracted salts thereof.

摘要翻译： 本发明提供了一种用于从含有该氨基酸及其盐的含水进料溶液中的杂质中分离氨基酸及其盐的方法，该方法包括：a）使进料溶液与包含胺和酸的基本上不混溶的萃取剂相接触 两者都是游离盐和盐形式基本上不混溶的水，以提取相中的氨基酸和其盐，其中进料溶液在进料溶液的初始pH的两个pH单位内进行; 和b）用基本上中性的水性体系反冲洗萃取相，以基本上回收所有提取的氨基酸及其提取的盐。