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Title: Vitrification of organics-containing wastes

A process for stabilizing organics-containing waste materials and recovering metals therefrom, and a waste glass product made according to the process. Vitrification of wastes such as organic ion exchange resins, electronic components and the like can be accomplished by mixing at least one transition metal oxide with the wastes, and, if needed, glass formers to compensate for a shortage of silicates or other glass formers in the wastes. The transition metal oxide increases the rate of oxidation of organic materials in the wastes to improve the composition of the glass-forming mixture: at low temperatures, the oxide catalyzes oxidation of a portion of the organics in the waste; at higher temperatures, the oxide dissolves and the resulting oxygen ions oxidize more of the organics; and at vitrification temperatures, the metal ions conduct oxygen into the melt to oxidize the remaining organics. In addition, the transition metal oxide buffers the redox potential of the glass melt so that metals such as Au, Pt, Ag, and Cu separate from the melt in the metallic state and can be recovered. After the metals are recovered, the remainder of the melt is allowed to cool and may subsequently be disposed of. The product has goodmore » leaching resistance and can be disposed of in an ordinary landfill, or, alternatively, used as a filler in materials such as concrete, asphalt, brick and tile.« less
Inventors:
 [1]
  1. (Aiken, SC)
Issue Date:
OSTI Identifier:
871126
Assignee:
United States of America as represented by United States (Washington, DC) SRS
Patent Number(s):
US 5662579
Contract Number:
AC09-89SR18035
Research Org:
WESTINGHOUSE SAVANNAH RIVER CO
Country of Publication:
United States
Language:
English
Subject:
vitrification; organics-containing; wastes; process; stabilizing; waste; materials; recovering; metals; therefrom; glass; product; according; organic; exchange; resins; electronic; components; accomplished; mixing; transition; metal; oxide; formers; compensate; shortage; silicates; increases; rate; oxidation; improve; composition; glass-forming; mixture; temperatures; catalyzes; portion; organics; dissolves; resulting; oxygen; oxidize; conduct; melt; remaining; addition; buffers; redox; potential; cu; separate; metallic; recovered; remainder; allowed; cool; subsequently; disposed; leaching; resistance; ordinary; landfill; alternatively; filler; concrete; asphalt; brick; tile; recovering metals; glass former; organic materials; exchange resin; waste material; metal oxide; transition metal; waste materials; exchange resins; organic material; glass melt; electronic components; glass formers; waste glass; oxide buffer; containing wastes; glass product; containing waste; organics-containing waste; covering metal; /588/

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