Methods of purifying hydroxylamine solutions and converting hydroxylamine salts to hydroxylamine
申请人:Sachem, Inc.
公开号:EP0870532A2
公开(公告)日:1998-10-14
In one embodiment, the present invention provides a method of preparing hydroxylamine from a hydroxylammonium salt solution, including providing an electrochemical cell containing an anode, a cathode, a cation selective membrane and an anion selective membrane, wherein the cation selective membrane is positioned between the cathode and the anion selective membrane, and the anion selective membrane is positioned between the cation selective membrane and the anode, thereby defining a feed compartment between the cation selective membrane and the anion selective membrane, a recovery compartment between the cathode and the cation selective membrane, and an acid compartment between the anion selective membrane and the anode; charging a first solution to the acid compartment and a second solution the recovery compartment; charging the hydroxylammonium salt solution to the feed compartment; passing a current through the cell to produce hydroxylamine in the recovery compartment; and recovering hydroxylamine from the recovery compartment.
在一个实施方案中,本发明提供了一种从羟基铵盐溶液制备羟胺的方法,包括提供一个包含阳极、阴极、阳离子选择膜和阴离子选择膜的电化学电池,其中阳离子选择膜位于阴极和阴离子选择膜之间、阴离子选择性膜位于阳离子选择性膜和阳极之间,从而在阳离子选择性膜和阴离子选择性膜之间形成进料室,在阴极和阳离子选择性膜之间形成回收室,在阴离子选择性膜和阳极之间形成酸室;将第一种溶液注入酸室,将第二种溶液注入回收室;将羟基铵盐溶液注入进料室;通过电流使电池在回收室中产生羟胺;以及从回收室中回收羟胺。