Process for the preparation of hydroxylammonium salts

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

1996-11-08

1998-08-11

Langel, Wayne

Chemistry of inorganic compounds

Nitrogen or compound thereof

Oxygen containing

423388, C01B 2120, C01B 21093

Patent

active

057924392

ABSTRACT:
The invention relates to a process for the preparation of a hydroxylammonium salt through catalytic reduction of nitrate ions in an acid medium, in the presence of an activated catalyst, which catalyst comprises carrier particles with a plurality of metal particles containing palladium and platinum, the relative concentrations of the palladium and the platinum in each metal particle being substantially the same. In particular, the distribution of platinum concentrations among different metal particles has a standard deviation of less than 4% absolute.

REFERENCES:
patent: 3767758 (1973-10-01), Mars et al.
patent: 3996165 (1976-12-01), El-Ghatta et al.
patent: 4111842 (1978-09-01), Van Montfoort et al.
patent: 4832938 (1989-05-01), Gooser et al.
Belgium search report dated Nov. 10, 1995.
Toshima et al., `Polymer-protected Palladium-Platinum Bimetallic Clusters: Preparation, Catalytic Properties and Structural Consideration`, J. Chem. Soc. Faraday Trans., vol. 89, No. 14 (12 Jul. 1993).

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