Process for the recovery of value metals from base metal...

Details Process for the recovery of value metals from base metal... Process for the recovery of value metals from base metal...

2011-06-28

2011-06-28

Silverman, Stanley (Department: 1736)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

C423S038000, C423S040000, C423S048000

Reexamination Certificate

active

07968065

ABSTRACT:
A process for leaching a value metal from a base metal sulfide ore, comprising the step of leaching the ore with a lixiviant comprising a chloride, an oxidant and hydrochloric acid is disclosed. The leaching is controlled, by use of low concentrations of hydrochloric acid and a redox potential, to effect formation of hydrogen sulfide from the base metal sulfide ore. The hydrogen sulfide is stripped from the leach solution, thereby reducing the amount of sulfate generated in the leach to very low levels. The leaching may also be conducted to limit the co-dissolution of platinum group metals and gold with the base value metals. The leach forms a value metal-rich leachate and a solids residue. The solids residue may be subsequently leached to recover the platinum group metals and gold. The value metal-rich leachate can be oxidized and neutralized to recover the value base metals. In an embodiment, the chloride is magnesium chloride and lixiviant solution is regenerated.

REFERENCES:
patent: 704639 (1902-07-01), Hoepfner
patent: 735098 (1903-08-01), Hoepfner
patent: 752320 (1904-04-01), Alzugaray
patent: 1539714 (1925-05-01), Christensen
patent: 2424351 (1947-07-01), Christensen
patent: 3764490 (1973-10-01), Chambers
patent: 3791812 (1974-02-01), Frank et al.
patent: 3909249 (1975-09-01), Coldrey et al.
patent: 3922164 (1975-11-01), Reid et al.
patent: 3923616 (1975-12-01), Ataden et al.
patent: 3998628 (1976-12-01), Gandon et al.
patent: 4039406 (1977-08-01), Stanley et al.
patent: 4062924 (1977-12-01), Glaum
patent: 4097271 (1978-06-01), Swinkels et al.
patent: 4288304 (1981-09-01), DeMarthe et al.
patent: 4378275 (1983-03-01), Adamson et al.
patent: 4435368 (1984-03-01), Demartha et al.
patent: 4536214 (1985-08-01), Ochs et al.
patent: 4594132 (1986-06-01), Satchell, Jr. et al.
patent: 4614543 (1986-09-01), Duyvesteyn et al.
patent: 4944928 (1990-07-01), Grill
patent: 5232490 (1993-08-01), Bender et al.
patent: 5431788 (1995-07-01), Jones
patent: 5709730 (1998-01-01), Cashman
patent: RE37251 (2001-07-01), Jones
patent: 6315812 (2001-11-01), Fleming et al.
patent: 6395242 (2002-05-01), Allen et al.
patent: 6428599 (2002-08-01), Cashman
patent: 6471743 (2002-10-01), Young et al.
patent: 2002/0152845 (2002-10-01), Fleming et al.
patent: 2002/0159927 (2002-10-01), Allen et al.
patent: 844536 (1970-06-01), None
patent: 1143573 (1983-03-01), None
patent: 2385775 (2001-05-01), None
patent: 448-01 (2001-02-01), None
patent: 2998-01 (2001-12-01), None
patent: 697-03 (2003-05-01), None
patent: 155250 (1989-02-01), None
patent: A-1281779 (2003-02-01), None
patent: 227301 (1925-01-01), None
patent: 239720 (1925-09-01), None
patent: 1008196 (1965-10-01), None
patent: 1510676 (1978-05-01), None
patent: WO 01/23627 (2000-02-01), None
patent: A-9200939 (1993-08-01), None
Everett, P.K., “The Single Conversion of Chalcopyrite to Copper, Iron Oxide and Elemental Sulphur”, Paper presented at Extractive Metallurgy Symposium, Univ. of NSW (Aug. 11, 1977).
Winand, Rene, “Chloride hydrometallurgy”, Hydrometallurgy 27, (1991), p. 285-316.

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