Value recovery from spent alumina-base catalyst

Patent · Thu Jan 01 00:00:00 EST 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

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