Removal of nitric acid from nitric acid-sulfuric acid mixtures

Details Removal of nitric acid from nitric acid-sulfuric acid mixtures Removal of nitric acid from nitric acid-sulfuric acid mixtures

1977-11-14

1979-05-22

Vertiz, O. R.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423531, C01B 1790, C01B 1782

Patent

active

041559894

ABSTRACT:
Mixtures of nitric acid and sulfuric acid containing in excess of 70% sulfuric acid are denitrated by the addition of sufficient sulfur dioxide to such mixtures to convert the nitric acid to gaseous nitrogen oxides and vaporizing them from the solution in which they are formed. The process is particularly valuable for the treatment of spent nitration acids.

REFERENCES:
patent: 1561985 (1925-11-01), Klencke
patent: 1617212 (1927-02-01), Lamoreaux
patent: 1822447 (1931-09-01), Merriam
patent: 2315988 (1943-04-01), Somers et al.
patent: 2678872 (1954-05-01), Kachkaroff

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