Method for producing hydroxylamine sulfate

Abstract

The subject of the application is a method for producing hydroxylamine sulfate by catalytic reduction of nitric oxide with hydrogen carried out in a diluted sulfuric acid environment, where nitric oxide is produced at a temperature of 880°C to 940°C in the process of catalytic oxidation of ammonia with oxygen and in the presence of steam. In the process of catalytic oxidation of ammonia, the stream of the reaction mixture containing ammonia, oxygen and steam, with an initial temperature of 120°C to 160°C, flows first through an ammonia oxidation catalyst and then through a high-temperature nitrous oxide decomposition catalyst, where, after reducing the amount of nitrous oxide by more than 80%, the stream is directed to further stages of hydroxylamine sulfate production, using hydrogen at the stage of catalytic reduction of nitrogen oxide with hydrogen in an amount of up to 95% of the hydrogen consumed in the process when there is no nitrous oxide decomposition catalyst at the stage of ammonia oxidation.