Process for the manufacture of nitric oxide

Details Process for the manufacture of nitric oxide Process for the manufacture of nitric oxide

C - Chemistry, Metallurgy

01

B

C01B 21/24 (2006.01) C01B 21/42 (2006.01)

Patent

CA 2183027

Nitric oxide is produced by reacting aqueous nitric acid with gaseous sulfur dioxide in a gas-liquid contact reactor. The reaction is conducted in the presence of a stoichiometric excess of nitric acid to minimize the production of byproduct nitrous oxide and nitrogen. The nitric oxide product gas is chilled sufficiently to freeze most of the water and byproduct nitrogen dioxide contained in the nitric oxide product gas. Residual nitrogen dioxide can be removed by adsorptive separation using an adsorbent which preferentially adsorbs nitrogen dioxide.

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