Pilot plant denitration of Purex wastes with formaldehyde

Evans, T.F.

doi:10.2172/6604832

Cited by 11 publications

(6 citation statements)

References 2 publications

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“…Use of the formaldehyde process in the Purex Plant is contemplated for denitration of nitric acid in IWW (5,14). This process has many economic advantages in addition to its main justification of reducing the solids content (six-fold) and volume (three-fold) of high-level wastes for ultimate storage.…”

Section: G Nitric Acid Recovery and Waste Disposalmentioning

confidence: 99%

Description of Purex Plant Process

Irish¹

1959

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Section: G Nitric Acid Recovery and Waste Disposalmentioning

confidence: 99%

Description of Purex Plant Process

Irish¹

1959

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“…Formaldehyde denitration has also been extensively studied Cecille and Kelm 1986;Evans 1959;Forsman and Oberg 1963). An intermediate in the formaldehyde denitration is formic acid; therefore, the reaction pathways for formic acid and formaldehyde denitration are similar.…”

Section: A21 Formic Acid and Formaldehydementioning

confidence: 99%

Denitration of High Nitrate Salts Using Reductants

Smith¹,

Jones²,

Schmidt³

et al. 1999

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“…Various organic reductants have been used for this purpose. These have included: formaldehyde [2][3][4], sucrose [5][6][7], and formic acid [1,[8][9][10]. The first of these reductants, formaldehyde, had been used at Hanford for denitrating acid waste but was discontinued because of foaming, off-gas control, and line plugging due to polymerization.…”

Section: Process Selectionmentioning

confidence: 99%

Trioxane Initiated Formic Acid Denitration of Plutonium-Bearing Acid Solution

1984

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Denitration /Plutonium !Formic acid/TrioxaneSummaiy The Savannah River Laboratory (SRL) has developed a process for a controlled, in-situ chemical denitration of acidic plutoniumbearing solutions. In this process, trioxane, the cyclic trimer of formaldehyde, is used to initiate the reaction, while the bulk of the denitration is effected with formic acid. The rate of off-gas from the reaction is controlled by the formic acid addition rate and can easily be maintained within the capacity Umits of the vent ^stem of the reaction vessel.Studies on simulated and actual solutions at chemical feed rates which were scaled to plant rates, established that the acidic plutonium Solution could be safely and effectively denitrated at 70° to 80°C. The process was implemented as an actual plant test by the Savannah River Plant (SRP). The results of the laboratory experiments and those of the plant test are described.

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Pilot plant denitration of Purex wastes with formaldehyde

Cited by 11 publications

References 2 publications

Description of Purex Plant Process

Description of Purex Plant Process

Denitration of High Nitrate Salts Using Reductants

Trioxane Initiated Formic Acid Denitration of Plutonium-Bearing Acid Solution

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