Preparation of hydroxylammonium salts

Details Preparation of hydroxylammonium salts Preparation of hydroxylammonium salts

1995-02-01

1996-09-10

Langel, Wayne

Chemistry of inorganic compounds

Nitrogen or compound thereof

Oxygen containing

423388, C01B 2120

Patent

active

055543537

ABSTRACT:
A process for the preparation of hydroxylammonium salts by catalytic reduction of nitrogen monoxide using hydrogen in the presence of a hydrogenation catalyst, comprises
(a) in a first step, filtering the reaction mixture obtained after the reaction, giving a solution of essentially hydroxylammonium salt and a filter residue essentially comprising a mixture of hydrogenation catalyst and a solution of essentially hydroxylammonium salt, and
(b) in a second step, subjecting the filter residue to a further separation process in order to concentrate the hydrogenation catalyst, giving a mixture having a higher concentration of hydrogenation catalyst than the filter residue and a mixture having a lower concentration of hydrogenation catalyst than the filter residue.

REFERENCES:
patent: 4404176 (1983-09-01), Grosskinsky et al.
patent: 4477424 (1984-10-01), Grosskinsky et al.
patent: 5155081 (1992-10-01), Steigleiter et al.
John H. Perry's Chemical Engineers' Handbook, Fourth Edition (1963), McGraw-Hill Book Co., pp. 19-42, 19-86, 19-87.

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