Process for producing hydroxylamine

Details Process for producing hydroxylamine Process for producing hydroxylamine

2004-08-12

2009-02-17

Davis, Brian J (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C564S301000

Reexamination Certificate

active

07491846

ABSTRACT:
It is an object of the present invention to provide a process for producing a hydroxylamine by reacting a salt of hydroxylamine with an alkali compound, where the yield reduction due to formation of a complex between the produced hydroxylamine and a salt produced as a by-product or adsorption of the hydroxylamine to the by-product salt is decreased, and a high-concentration and high-purity hydroxylamine is safely produced at a high yield.The process for producing a hydroxylamine of the present invention comprises a reaction step of reacting a salt of hydroxylamine with an alkali compound to obtain a hydroxylamine while keeping the reaction solution at a pH of 7 or more, a purification step of purifying the hydroxylamine by ion exchange, and a concentration step of concentrating the hydroxylamine by distillation at the column bottom.

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Database CA ′Online! Chemical Abstracts Service, Columbus, Ohio, US; Kumiko Bansho, et al., “Production of Free Hydroxylamine, Aqueous Solution With High Yield”, XP002350144, Retrieved From STN, Database Accession No. 136:202673, Abstract, 2002.

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