Chemistry of inorganic compounds – Nitrogen or compound thereof – Oxygen containing
Patent
1978-09-15
1982-07-20
Vertiz, O. R.
Chemistry of inorganic compounds
Nitrogen or compound thereof
Oxygen containing
75128W, C01B 2120
Patent
active
043405754
ABSTRACT:
Hydroxylammonium salts are manufactured by a process comprising the catalytic reduction of nitric oxide with hydrogen in a dilute aqueous mineral acid in the presence of a suspended platinum catalyst at an elevated temperature, wherein the reaction is carried out in vessels of which the walls consist of conventional copper-free molybdenum-containing austenitic chromium-nickel steels which contain from 16 to 28% by weight of chromium, from 20 to 50% by weight of nickel, from 1 to 4% by weight of molybdenum and at most 0.1% by weight of carbon and which in addition contain an amount of titanium which is at least 5 times the amount of carbon but is not more than 1.0% by weight, or an amount of niobium or tantalum which is at least 8 times the amount of carbon but is not more than 1.5% by weight.
The present invention relates to a process for the manufacture of of hydroxylammonium salts by catalytically reducing nitric oxide with hydrogen in a dilute aqueous mineral acid in the presence of a suspended platinum catalyst at an elevated temperature, using corrosion-resistant materials of construction.
REFERENCES:
patent: 2115732 (1938-05-01), Krivobok
patent: 3929473 (1975-12-01), Streicher
Cartech (Carpenter Technology), Carpenter Steel Division, Carpenter Pyromet N-155.
Jockers Kurt
Rapp Guenther
Thomas Erwin
BASF - Aktiengesellschaft
Langel Wayne A.
Vertiz O. R.
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