Manufacture of hydroxylammonium salts

Details Manufacture of hydroxylammonium salts Manufacture of hydroxylammonium salts

1978-08-10

1980-03-11

Thomas, Earl C.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Oxygen containing

C01B 2114

Patent

active

041928563

ABSTRACT:
Hydroxylammonium salts are manufactured by a process comprising the catalytic reduction of nitric oxide with hydrogen in a dilute aqueous solution of a mineral acid in the presence of a suspended platinum catalyst at an elevated temperature, wherein the reaction mixture is recycled and the gas mixture, containing nitric oxide and hydrogen, present in the gas space above the reaction zone, is introduced, by means of one or more downwardly directed jets of liquid, consisting of the recycled reaction mixture and issuing from a nozzle orifice, into one or more circulation zones which are present in the reaction zone, are open at both sides, extend in the direction of the entering jet of liquid and are completely covered by the reaction mixture, the reaction mixture leaving the bottom of the circulation zone and containing unconverted gases is deflected, passed upwards in the annular zone externally surrounding the circulation zone, and at the same time reaction mixture of low gas content is recycled from a separation zone located under the reaction zone.

REFERENCES:
patent: 2414142 (1947-01-01), Dreyfus
patent: 2823101 (1958-02-01), Jockers et al.
patent: 3295925 (1967-01-01), Fueg et al.
patent: 3484214 (1969-12-01), Gehring
patent: 3954946 (1976-05-01), Graf et al.
patent: 3956469 (1976-05-01), El-Ghatta et al.

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