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Title: Value recovery from spent alumina-base catalyst

A process for the recovery of aluminum and at least one other metal selected from the group consisting of molybdenum, nickel and cobalt from a spent hydrogenation catalyst comprising (1) adding about 1 to 3 parts H.sub.2 SO.sub.4 to each part of spent catalyst in a reaction zone of about 20.degree. to 200.degree. C. under sulfide gas pressure between about 1 and about 35 atmospheres, (2) separating the resultant Al.sub.2 (SO.sub.4).sub.3 solution from the sulfide precipitate in the mixture, (3) oxidizing the remaining sulfide precipitate as an aqueous slurry at about 20.degree. to 200.degree. C. in an oxygen-containing atmosphere at a pressure between about 1 and about 35 atmospheres, (4) separating the slurry to obtain solid molybdic acid and a sulfate liquor containing said at least one metal, and (5) recovering said at least one metal from the sulfate liquor in marketable form.
Authors:
 [1]
  1. (Northglenn, CO)
Publication Date:
OSTI Identifier:
866213
Report Number(s):
US 4657745
DOE Contract Number:
AC03-83ER80032
Resource Type:
Patent
Research Org:
CHEMICAL SALES CO INC
Country of Publication:
United States
Language:
English
Subject:
value; recovery; spent; alumina-base; catalyst; process; recovery; aluminum; metal; selected; consisting; molybdenum; nickel; cobalt; spent; hydrogenation; catalyst; comprising; adding; spent; catalyst; reaction; zone; 20; degree; 200; degree; sulfide; gas; pressure; 35; atmospheres; separating; resultant; solution; sulfide; precipitate; mixture; oxidizing; remaining; sulfide; precipitate; aqueous; slurry; 20; degree; 200; degree; oxygen-containing; atmosphere; pressure; 35; atmospheres; separating; slurry; obtain; solid; molybdic; acid; sulfate; liquor; containing; metal; recovering; metal; sulfate; liquor; marketable; form; hydrogenation catalyst; reaction zone; gas pressure; catalyst comprising; metal selected; aqueous slurry; oxygen-containing atmosphere; liquor containing; containing atmosphere; spent catalyst /423/75/502/