Process for recovery of nitric acid from nitrates

Details Process for recovery of nitric acid from nitrates Process for recovery of nitric acid from nitrates

1978-03-28

1980-05-27

Peters, G. O.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Oxygen containing

C01B 2142

Patent

active

042050545

ABSTRACT:
A process for recovery of nitric acid comprising incorporating or absorbing waste nitric acid and/or a nitrate in an oil-absorbing inorganic carrier and forming a nitrate-carrier granule containing water in the form of a hydroxide, a hydrate or adsorption moisture in an amount sufficient to generate a vapor of nitric acid stably and being substantially non-sticky at a decomposition temperature of the nitrate; heating the formed granule while keeping the substantially non-sticky state in the granule to decompose the nitrate in the granule to a vapor of nitric acid; and recovering the generated vapor of nitric acid is disclosed. According to this process, nitric acid can be directly recovered from waste nitric acid or a nitrate in the form of a vapor of nitric acid without substantial generation of nitrogen oxide gases by using a cheap and easily available inorganic carrier.

REFERENCES:
patent: 2737445 (1956-03-01), Nossen
patent: 2757072 (1956-07-01), Kapp et al.
patent: 3702885 (1972-11-01), Markey
patent: 3869543 (1975-03-01), Schutte

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