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Title: Electrochemical catalyst recovery method

A method of recovering catalyst material from latent catalyst material solids includes: a) combining latent catalyst material solids with a liquid acid anolyte solution and a redox material which is soluble in the acid anolyte solution to form a mixture; b) electrochemically oxidizing the redox material within the mixture into a dissolved oxidant, the oxidant having a potential for oxidation which is effectively higher than that of the latent catalyst material; c) reacting the oxidant with the latent catalyst material to oxidize the latent catalyst material into at least one oxidized catalyst species which is soluble within the mixture and to reduce the oxidant back into dissolved redox material; and d) recovering catalyst material from the oxidized catalyst species of the mixture. The invention is expected to be particularly useful in recovering spent catalyst material from petroleum hydroprocessing reaction waste products having adhered sulfides, carbon, hydrocarbons, and undesired metals, and as well as in other industrial applications.
 [1];  [1]
  1. (Richland, WA)
Issue Date:
OSTI Identifier:
Battelle Memorial Institute (Richland, WA) PNNL
Patent Number(s):
US 5420088
Contract Number:
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA
Country of Publication:
United States
electrochemical; catalyst; recovery; method; recovering; material; latent; solids; combining; liquid; acid; anolyte; solution; redox; soluble; form; mixture; electrochemically; oxidizing; dissolved; oxidant; potential; oxidation; effectively; reacting; oxidize; oxidized; species; reduce; expected; particularly; useful; spent; petroleum; hydroprocessing; reaction; waste; products; adhered; sulfides; carbon; hydrocarbons; undesired; metals; industrial; applications; recovery method; industrial applications; waste product; desired metal; latent catalyst; catalyst material; particularly useful; waste products; acid anolyte; catalyst recovery; undesired metals; spent catalyst; material solids; /502/204/205/423/