Copper recovery by leaching and ion exchange

Details Copper recovery by leaching and ion exchange Copper recovery by leaching and ion exchange

1977-02-28

1978-01-17

Vertiz, O. R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

75101R, 75101BE, 75117, 423 24, 423 27, C25C 112, C22B 1500

Patent

active

040691195

ABSTRACT:
This invention relates to a process whereby recovery of copper from copper ores using leaching and ion exchange 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 by ion exchange techniques to yield a raffinate which still contains some copper values, and cycling part of the raffinate through a low pH ion exchange 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: 3853618 (1974-12-01), Smith
patent: 3998924 (1976-12-01), Jones et al.
patent: 4013754 (1977-03-01), Stauter et al.
patent: 4017309 (1977-04-01), Johnson
Naden et al. "The Use of Continuous Ion Exchange in Copper Recovery Problems" J. Appl. Chem. Biotechnol. 1974 24 687-700.
Hughes et al. "Use of Solvent-Impregnated Polymer to Extract Copper from Certain Acid Solutions", Inst. Mining & Metallurgy Transactions vol. 85, sect. C 9/76.

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