Patent · US Expired

Process for production of aqueous solutions of free hydroxylamine

US5837107A · kind A · utility

19Cited by

4References

14Claims

0Family size

Assignee

BASF SE

Inventors

Otto Watzenberger · Ludwigshafen, DE
Hans-Michael Schneider · Worms, DE
Bernd Leutner · Bischofswerda, DE
Albrecht Friederang

Key dates

Filing date	Jul 29, 1996
Grant date	Nov 17, 1998
Priority date	—
Expiry date	Jul 29, 2016

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S203/20
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

An aqueous solution of free hydroxylamine is prepared by a process in which the solution obtained by treating a hydroxylammonium salt with a base is separated into an aqueous hydroxylamine solution and a salt fraction by treatment with water or steam at .ltoreq.80.degree.0 C. The novel process can be carried out in a simple and gentle manner and on a large industrial scale. Owing to the low thermal load, the low concentration of hydroxylamine and the short residence time in the process, the risk of decomposition is minimized.

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