GB791059A - Improvements in or relating to removal of nitric acid from aqueous solutions - Google Patents

Improvements in or relating to removal of nitric acid from aqueous solutions

Info

Publication number
GB791059A
GB791059A GB965555A GB965555A GB791059A GB 791059 A GB791059 A GB 791059A GB 965555 A GB965555 A GB 965555A GB 965555 A GB965555 A GB 965555A GB 791059 A GB791059 A GB 791059A
Authority
GB
United Kingdom
Prior art keywords
nitric acid
raffinate
organic solvent
water
uranium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB965555A
Inventor
William Douglas Jamrack
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB965555A priority Critical patent/GB791059A/en
Publication of GB791059A publication Critical patent/GB791059A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
    • C01B21/38—Nitric acid
    • C01B21/46—Purification; Separation ; Stabilisation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Extraction Or Liquid Replacement (AREA)

Abstract

Effluent aqueous raffinate resulting from the organic solvent extraction of aqueous nitric acid solutions of neutron-irradiated uranium is extracted with an organic solvent in which nitric acid is soluble and the organic solvent solution of nitric acid produced is treated with water to dissolve the nitric acid. Solvents may be dibutyl phosphate, diethylene glycol dibutyl ether, or tributyl phosphate, and the latter may be diluted with a non-polar organic diluent, e.g. kerosene. The raffinate may be 3N in nitric acid and contains uranium, plutonium, and uranium fission products having b and g activity, e.g. cesium 137, whose isolation necessitates evaporation, which is difficult in the presence of nitric acid. An effluent raffinate containing nitric acid, ruthenium, zirconium, and plutonium is subjected to countercurrent extraction, preferably in a 12-stage airlift extractor with the organic solvent, the flow rate of solvent to raffinate being approximately 16: 1. The organic solvent solution may be subjected to one or more stripping stages, and is then washed with water in countercurrent, the flow rate of water being 1/4 that of the solution. The washed solvent is returned to reservoirs for reuse. The extracted raffinate was 0.13 N nitric acid and could be readily evaporated.
GB965555A 1955-04-01 1955-04-01 Improvements in or relating to removal of nitric acid from aqueous solutions Expired GB791059A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB965555A GB791059A (en) 1955-04-01 1955-04-01 Improvements in or relating to removal of nitric acid from aqueous solutions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB965555A GB791059A (en) 1955-04-01 1955-04-01 Improvements in or relating to removal of nitric acid from aqueous solutions

Publications (1)

Publication Number Publication Date
GB791059A true GB791059A (en) 1958-02-19

Family

ID=9876196

Family Applications (1)

Application Number Title Priority Date Filing Date
GB965555A Expired GB791059A (en) 1955-04-01 1955-04-01 Improvements in or relating to removal of nitric acid from aqueous solutions

Country Status (1)

Country Link
GB (1) GB791059A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523765A (en) * 1966-03-08 1970-08-11 Commissariat Energie Atomique Multistage process for extracting u and pu with solvent comprising tributylphosphate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523765A (en) * 1966-03-08 1970-08-11 Commissariat Energie Atomique Multistage process for extracting u and pu with solvent comprising tributylphosphate

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