Mercury-free dissolution of aluminum-clad fuel in nitric acid

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Description

It is the purpose of this invention to provide a continuous optimum process for the dissolution of aluminum, without the use of a mercury catalyst. Ile invention generally stated is: a process for dissolution of aluminum comprising: preparing a mixture of nitric acid`and fluoboric acid in a makeup vessel or individual reagents in separate vessels; placing an aluminum element in a dissolver vessel having an overflow; transferring a portion of the mixture of nitric acid and fluoboric acid to the dissolver vessel from the makeup vessel; heating the dissolver vessel and mixture to a boiling temperature and holding that temperature ... continued below

Physical Description

19 p.

Creation Information

Christian, J.D. & Anderson, P.A. December 31, 1993.

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This patent is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 22 times . More information about this patent can be viewed below.

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Description

It is the purpose of this invention to provide a continuous optimum process for the dissolution of aluminum, without the use of a mercury catalyst. Ile invention generally stated is: a process for dissolution of aluminum comprising: preparing a mixture of nitric acid`and fluoboric acid in a makeup vessel or individual reagents in separate vessels; placing an aluminum element in a dissolver vessel having an overflow; transferring a portion of the mixture of nitric acid and fluoboric acid to the dissolver vessel from the makeup vessel; heating the dissolver vessel and mixture to a boiling temperature and holding that temperature until a desired concentration of dissolved aluminum is achieved; adding a constant flow influent of the mixture of nitric acid and fluoboric acid to the dissolver vessel; and collecting an effluent from the dissolver vessel overflow, said effluent containing a mixture of aluminum nitrate, nitric acid, fluoboric acid, water, and dissolved fuel components. The variables in the above process can be temperature, effluent flow rate, and concentration of the acids as will be discussed later. For corrosion control, it may be necessary to initiate reaction at a decreased HNO{sub 3} concentration and to increase it after a sufficient concentration of aluminum nitrate has accrued. The process may be adapted to batch processing, as well. Again, acid concentrations may be initially relatively small and, then, gradually increased as reaction proceeds until the desired excess of HNO{sub 3} above stoichiometric quantity has been added. Other objects, advantages, and capabilities of the present invention will become more apparent as the description proceeds.

Physical Description

19 p.

Notes

INIS; OSTI as DE96005144

Source

  • Other Information: PBD: 1993

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  • Other: DE96005144
  • Report No.: PATENTS-US--A8105236
  • Grant Number: AC07-84ID12435
  • Office of Scientific & Technical Information Report Number: 205956
  • Archival Resource Key: ark:/67531/metadc671676

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • December 31, 1993

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

Description Last Updated

  • Nov. 24, 2015, 12:15 p.m.

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Citations, Rights, Re-Use

Christian, J.D. & Anderson, P.A. Mercury-free dissolution of aluminum-clad fuel in nitric acid, patent, December 31, 1993; United States. (digital.library.unt.edu/ark:/67531/metadc671676/: accessed January 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.