Catalyzed electrochemical dissolution for spent catalyst recovery

Journal Article · Mon Nov 01 00:00:00 EST 1993 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00023a007· OSTI ID:5536208

Silva, L J; Bray, L A; Matson, D W ^[1]

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1. Pacific Northwest Lab., Richland, WA (United States)

Increasing concern for pollution prevention and waste disposal has created a need for clean alternatives for spent catalyst recovery or disposal. A new technique uses catalyzed electrochemical dissolution to oxidize and subsequently dissolve typical catalyst metals and metal contaminants so that they may be isolated and reclaimed. Hydrocarbons and carbonaceous materials adhered to the catalyst surface are oxidized to carbon dioxide and water at moderate temperatures and ambient pressure. Sulfides are converted to aqueous sulfur species. Supercritical fluid extraction is an optional pretreatment step to remove hydrocarbons adhered to the catalyst. The technique described here offers advantages over conventional spent catalyst reclamation processes. In this paper, recovery of a spent hydrodesulfurization catalyst is described.

• OSTI ID: 5536208
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Vol. 32:11; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CATALYSTS
MATERIALS RECOVERY
HYDROCARBONS
DESULFURIZATION
CARBON DIOXIDE
ELECTROCHEMICAL CELLS
METALS
OXIDATION
SOLVENT EXTRACTION
SUPERCRITICAL STATE
WASTE PRODUCT UTILIZATION
WATER
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
EXTRACTION
HYDROGEN COMPOUNDS
MANAGEMENT
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROCESSING
SEPARATION PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
020400* - Petroleum- Processing