Patent · US Expired

Preparation of substantially salt-free aqueous solutions of bisaminoxyalkanes

US5597466A · kind A · utility

4Cited by

2References

9Claims

0Family size

Assignee

BASF SE

Inventors

Gerhard Bauer · Düsseldorf, DE
Roland Baumstark · Neustadt, DE
Kaspar Bott · Mannheim, DE
Hartwig Voss · Bischofswerda, DE

Key dates

Filing date	Jul 26, 1994
Grant date	Jan 28, 1997
Priority date	—
Expiry date	Jul 26, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K5/32
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Salt-free aqueous solutions of bisaminoxyalkanes (I) are prepared by a process in which PA1 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), PA1 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, PA1 c) an alkali metal hydroxide is added to the remaining aqueous solution to liberate the bisaminoxyalkane (I) and PA1 d) the ionic components are removed from the resulting aqueous solution by electrodialysis.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.