Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1976-05-14
1977-08-02
Vertiz, O. R.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
75117, 423 24, 423 27, C25C 112
Patent
active
040394050
ABSTRACT:
This invention relates to a process whereby recovery of copper from copper ores using leaching and solvent extraction techniques can be increased. The process generally comprises leaching to obtain a pregnant leach liquor, washing ore residues with an extra quantity of water to obtain extra dissolved copper values, recovering said copper values, combining the extra wash water with the pregnant leach liquor, extracting copper values from the total leach liquor to yield a raffinate which still contains some copper values, and cycling part of the raffinate through a low pH extraction circuit to lower the copper values remaining in the raffinate to about 0.01 to 0.02 grams per liter or less before disposal.
REFERENCES:
patent: 2831763 (1958-04-01), Nashner et al.
patent: 3655347 (1972-04-01), Mattison
patent: 3697400 (1972-10-01), Pang
patent: 3777003 (1974-12-01), Mitterer
patent: 3853981 (1974-12-01), Hadzeriga
patent: 3863002 (1975-01-01), Pace et al.
Agers et al., TMS Paper No. A72-87, A.I.M.E., New York, (1972), pp. 1-22.
Continental Oil Company
Hearn Brian E.
Schupbach, Jr. Cortlan R.
Vertiz O. R.
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