Value recovery from spent alumina-base catalyst

Patent · 01 January 1987

OSTI ID:866213

Hyatt, David E ^[1]

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1. Northglenn, CO

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.

• Research Organization: CHEMICAL SALES CO INC
• DOE Contract Number: AC03-83ER80032
• Assignee: Chemical & Metal Industries, Inc. (Denver, CO)
• Patent Number(s): US 4657745
• OSTI ID: 866213
• Country of Publication: United States
• Language: English

Related Subjects

/423/75/502/
20
200
35
acid
adding
alumina-base
aluminum
aqueous
aqueous slurry
atmosphere
atmospheres
catalyst
catalyst comprising
cobalt
comprising
consisting
containing
containing atmosphere
degree
form
gas
gas pressure
hydrogenation
hydrogenation catalyst
liquor
liquor containing
marketable
metal
metal selected
mixture
molybdenum
molybdic
nickel
obtain
oxidizing
oxygen-containing
oxygen-containing atmosphere
precipitate
pressure
process
reaction
reaction zone
recovering
recovery
remaining
resultant
selected
separating
slurry
solid
solution
spent
spent catalyst
sulfate
sulfide
value
zone