Method for dissolution and stabilization of silica-rich fibers

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Description

This invention is comprised of a method for dissolving silica-rich fibers such as borosilicate fibers, fiberglass and asbestos to stabilize them for disposal. The method comprises (1) immersing the fibers in hot, five-weight-percent sodium hydroxide solution until the concentration of dissolved silica reaches equilibrium and a only a residue is left (about 48 hours), then immersing the residue in hot, five-weight-percent nitric acid until the residue dissolves (about 96 hours). After adjusting the pH of the dissolved fibers to be caustic, the solution can then be added to a waste vitrification stream for safe disposal. The method is useful in … continued below

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10 p.

Creation Information

Jantzen, Carol M. December 31, 1992.

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Description

This invention is comprised of a method for dissolving silica-rich fibers such as borosilicate fibers, fiberglass and asbestos to stabilize them for disposal. The method comprises (1) immersing the fibers in hot, five-weight-percent sodium hydroxide solution until the concentration of dissolved silica reaches equilibrium and a only a residue is left (about 48 hours), then immersing the residue in hot, five-weight-percent nitric acid until the residue dissolves (about 96 hours). After adjusting the pH of the dissolved fibers to be caustic, the solution can then be added to a waste vitrification stream for safe disposal. The method is useful in disposing contaminated HEME and HEPA filters.

Physical Description

10 p.

Notes

OSTI as DE94007357; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov

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  • Other Information: PBD: 1992

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  • Other: DE94007357
  • Report No.: PATENTS-US--A7821653
  • Grant Number: AC09-89SR18035
  • Office of Scientific & Technical Information Report Number: 10128689
  • Archival Resource Key: ark:/67531/metadc1318914

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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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  • December 31, 1992

Added to The UNT Digital Library

  • Nov. 3, 2018, 11:47 a.m.

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  • Oct. 21, 2019, 10:11 a.m.

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Jantzen, Carol M. Method for dissolution and stabilization of silica-rich fibers, patent, December 31, 1992; Aiken, South Carolina. (https://digital.library.unt.edu/ark:/67531/metadc1318914/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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