Nitric acid recovery from waste solutions

Title: Nitric acid recovery from waste solutions

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Abstract

The recovery of nitric acid from aqueous nitrate solutions containing fission products as impurities is described. It is desirable to subject such solutions to concentration by evaporation since nitric acid is regenerated thereby. A difficulty, however, is that the highly radioactive fission product ruthenium is volatilized together with the nitric acid. It has been found that by adding nitrous acid, ruthenium volatilization is suppressed and reduced to a negligible degree so that the distillate obtained is practically free of ruthenium.

Inventors:: Wilson, A. S.

Publication Date:: 1959-04-14

Research Org.:: Originating Research Org. not identified

OSTI Identifier:: 4215794

Patent Number(s):: 2,882,129

Assignee:: U.S. Atomic Energy Commission

NSA Number:: NSA-13-022046

Resource Type:: Patent

Resource Relation:: Other Information: Orig. Receipt Date: 31-DEC-59

Country of Publication:: United States

Language:: English

Subject:: CHEMISTRY; CHEMICAL REACTIONS; CHEMICALS; DISTILLATION; ENRICHMENT; EVAPORATION; FISSION PRODUCTS; IMPURITIES; MINERAL ACIDS; MIXING; NITRATES; NITRIC ACID; NITROGEN COMPOUNDS; NITROUS ACID; OPERATION; OXYGEN COMPOUNDS; PATENT; PERFORMANCE; RADIATION DOSES; RADIOACTIVITY; RECOVERY; REDUCTION; RUTHENIUM COMPOUNDS; SOLUTIONS; VOLATILITY; WASTE PROCESSING; WASTE SOLUTIONS; WATER

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                    Wilson, A. S. Nitric acid recovery from waste solutions.  United States: N. p., 1959. 
        Web.

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                    Wilson, A. S. Nitric acid recovery from waste solutions.  United States.

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                    Wilson, A. S. Tue .  
        "Nitric acid recovery from waste solutions".  United States.  https://www.osti.gov/servlets/purl/4215794.

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@article{osti_4215794,

  title        = {Nitric acid recovery from waste solutions},

  author       = {Wilson, A. S.},

  abstractNote = {The recovery of nitric acid from aqueous nitrate solutions containing fission products as impurities is described. It is desirable to subject such solutions to concentration by evaporation since nitric acid is regenerated thereby. A difficulty, however, is that the highly radioactive fission product ruthenium is volatilized together with the nitric acid. It has been found that by adding nitrous acid, ruthenium volatilization is suppressed and reduced to a negligible degree so that the distillate obtained is practically free of ruthenium.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/4215794},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1959},

  month        = {4}

}

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The recovery of nitric acid from aqueous nitrate solutions containing fission products as impurities is described. It is desirable to subject such solutions to concentration by evaporation since nitric acid is regenerated thereby. A difficulty, however, is that the highly radioactive fission product ruthenium is volatilized together with the nitric acid. It has been found that by adding nitrous acids ruthenium volatilization is suppressed and reduced to a negligible degree so that the distillate obtained is practically free of rutheniuim.
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