Preparation of substantially salt-free aqueous solutions of bisaminoxyalkanes

摘要

Salt-free aqueous solutions of bisaminoxyalkanes (I) are prepared by a process in which a) a dihaloalkane (II) is converted with a ketoxime (III) in an aqueous solution of a strong mineral base into the alkylene bisoxime ether (IV), b) the alkylene bisoxime ether (IV) is cleaved with a strong mineral acid and water to give the ketone and the salt of the mineral acid with the bisaminoxyalkane (I), and the ketone is separated off in a conventional manner, c) an alkali metal hydroxide is added to the remaining aqueous solution to liberate the bisaminoxyalkane (I) and d) the ionic components are removed from the resulting aqueous solution by electrodialysis.