Stability of complexed Rover dissolver solutions containing high concentrations of niobium, fluoride-ion, and aluminum

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Description

The processing of nuclear rocket (Rover) fuels requires high concentrations of hydrofluoric acid and nitric acid in the dissolver solution to dissolve the uranium and niobium. The resulting dissolver solutlon is highly corrosive and requires the addition of aluminum nitrate to complex the free fluoride'' and reduce corrosion on stainless steel processing equipment located downstream from the dissolver. The dissolver solution is very sensitive to aluminum nitrate addition; excessive aluminum nitrate results in precipitation of Nb/sub 2/O/sub 5/. Insufficient aluminum nitrate results in precipitation of AlF/ sub 3/, and the solution remains corrosive. The stability range of the complexed dissolver ... continued below

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Pages: 19

Creation Information

Rindfleisch, J.A. February 1, 1974.

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Description

The processing of nuclear rocket (Rover) fuels requires high concentrations of hydrofluoric acid and nitric acid in the dissolver solution to dissolve the uranium and niobium. The resulting dissolver solutlon is highly corrosive and requires the addition of aluminum nitrate to complex the free fluoride'' and reduce corrosion on stainless steel processing equipment located downstream from the dissolver. The dissolver solution is very sensitive to aluminum nitrate addition; excessive aluminum nitrate results in precipitation of Nb/sub 2/O/sub 5/. Insufficient aluminum nitrate results in precipitation of AlF/ sub 3/, and the solution remains corrosive. The stability range of the complexed dissolver solution is narrow and time dependent. The stability range was determined expenimentally to vary from 24--30% for a 2-hr period and from 0-10% for a 24-hr period. The stability range is increased to 40% over a 5-day peniod when the solution is diluted and adjusted for solvent exrraction feed. (auth)

Physical Description

Pages: 19

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Dep. NTIS

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  • Other Information: Orig. Receipt Date: 30-JUN-74

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  • Report No.: ICP--1039
  • Grant Number: AT(10-1)-1375
  • DOI: 10.2172/4328568 | External Link
  • Office of Scientific & Technical Information Report Number: 4328568
  • Archival Resource Key: ark:/67531/metadc1025740

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • February 1, 1974

Added to The UNT Digital Library

  • Oct. 15, 2017, 10:09 p.m.

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  • Oct. 23, 2017, 6:02 p.m.

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Rindfleisch, J.A. Stability of complexed Rover dissolver solutions containing high concentrations of niobium, fluoride-ion, and aluminum, report, February 1, 1974; United States. (digital.library.unt.edu/ark:/67531/metadc1025740/: accessed November 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.