Process for the preparation and processing of a hydroxylammonium

Details Process for the preparation and processing of a hydroxylammonium Process for the preparation and processing of a hydroxylammonium

1993-06-15

1994-11-15

Langel, Wayne

Chemistry of inorganic compounds

Nitrogen or compound thereof

Oxygen containing

423392, 564259, C01B 2120

Patent

active

053646096

ABSTRACT:
A process for the preparation and processing of a hydroxylammonium salt solution involves maintaining an aqueous acid reaction medium circulation between a hydroxylammonium salt synthesis zone and an oxime synthesis zone; continuously supplying nitrate ions or nitrogen oxides to be converted into nitrate, by way of nitrogen source for the formation of the hydroxylammonium salt, to the liquid being maintained in circulation; catalytically reducing the nitrate ions with hydrogen to obtain hydroxylamine; removing the ammonium ions, formed as a by-product in the reduction of the nitrate ions, by contacting the circulating liquid with a gas flow consisting of nitrogen oxides generated in catalytic combustion of ammonia. Advantageously, 0.01 to 5 wt. % of the nitrogen oxides formed in the combustion effect reduction of the ammonium ions to nitrogen, and the remainder of the nitrogen oxides are used for the preparation of nitric acid.

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