Process for the preparation of hydroxylammonium

Details Process for the preparation of hydroxylammonium Process for the preparation of hydroxylammonium

2006-08-15

2006-08-15

Langel, Wayne A. (Department: 1754)

Chemistry of inorganic compounds

Nitrogen or compound thereof

Oxygen containing

C540S535000, C568S362000, C585S266000, C585S271000

Reexamination Certificate

active

07090817

ABSTRACT:
The invention relates to a process for the preparation of hydroxylammonium, said process comprising the steps of:a) feeding gaseous hydrogen to a reaction mixture, said reaction mixture comprising an aqueous reaction medium and a gaseous phase;b) catalytically reducing, in said reaction mixture, nitrate or nitrogen oxide with hydrogen to form the hydroxylammonium;c) withdrawing a gas mixture from the reaction mixture, said gas mixture comprising gaseous hydrogen and gaseous non-hydrogen compounds;d) separating at least part of the gaseous non-hydrogen compounds from the gas mixture to obtain a hydrogen-enriched gas; ande) passing the hydrogen-enriched gas to a hydrogenation zone.

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