Process for decomposing nitrates in aqueous solution

Details Process for decomposing nitrates in aqueous solution Process for decomposing nitrates in aqueous solution

1979-06-20

1980-09-30

Kyle, Deborah L.

Compositions

Organic luminescent material containing compositions

Scintillating or lasing compositions

423 11, 423250, 423251, 423260, 423261, 423351, 423400, C01G 5600, C01B 2122

Patent

active

042254558

ABSTRACT:
This invention is a process for decomposing ammonium nitrate and/or selected metal nitrates in an aqueous solution at an elevated temperature and pressure. Where the compound to be decomposed is a metal nitrate (e.g., a nuclear-fuel metal nitrate), a hydroxylated organic reducing agent therefor is provided in the solution. In accordance with the invention, an effective proportion of both nitromethane and nitric acid is incorporated in the solution to accelerate decomposition of the ammonium nitrate and/or selected metal nitrate. As a result, decomposition can be effected at significantly lower temperatures and pressures, permitting the use of system components composed of off-the-shelf materials, such as stainless steel, rather than more costly materials of construction. Preferably, the process is conducted on a continuous basis. Fluid can be automatically vented from the reaction zone as required to maintain the operating temperature at a moderate value--e.g., at a value in the range of from about 130.degree.-200.degree. C.

REFERENCES:
patent: 3008904 (1961-11-01), Johnson, Jr. et al.
patent: 3158577 (1964-11-01), Bray et al.
patent: 3673086 (1972-06-01), Drobnik
patent: 3725293 (1973-04-01), Haas
patent: 3801701 (1974-04-01), Robins et al.
patent: 3862296 (1975-01-01), Dotson et al.
patent: 3962114 (1976-06-01), Berreth

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