Regeneration method of CP180 copper extraction agent

Abstract

The invention relates to the technical field of hydrometallurgy, in particular to a regeneration method of a CP180 copper extraction agent. According to the method, ammonium hydroxide or ammonium bicarbonate is adopted to replace traditional scrubbing solutions to wash, regenerate and reuse poisoned CP180, so that the reuse effect of CP180 is not changed, and the problem that CP180 is easy to be poisoned and aged when Ge, Cu and Zn organic phases are separated and extracted from a H2SO4 solution containing Ge, Cu and Zn is solved; the smooth implementation of the process that CP180 is reused for extracting copper is facilitated, so that the usage amount of CP180 is reduced, and the discharged volume of waste liquor and environmental pollution are reduced; the phase-splitting in the washing process is easy, the difficulty of the regeneration, recycle and treatment of CP180 is reduced; the cost of the regeneration of CP180 is reduced; the cost of purifying Ge and Cu when a solution containing Zn is electrolyzed to generate Zn is reduced.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for regenerating a CP180 copper extractant. Background technique [0002] In the prior art, for materials containing Ge, Cu, and Zn, the N235-kerosene system is usually used to extract Ge after H2SO4 leaching, and then Cp180 is used to extract Cu, and the copper extraction residue is sent to the electric zinc production system to recover Zn, thereby achieving Separation of Ge, Cu, Zn. However, during the Cu extraction process, Cp180 is prone to poisoning and aging, which leads to a higher amount of CP180 extractant, higher extraction costs, and it will also make it difficult for the copper extraction process to proceed smoothly, resulting in the discharge of a large amount of waste liquid , causing environmental pollution. [0003] For this reason, in the prior art, someone adopts HF, NH 4 F or (NH 4 ) 2 SO 4 After the aqueous solution washes and regenerate...

AI Technical Summary

Problems solved by technology

However, during the Cu extraction process, Cp180 is prone to poisoning and aging, which leads to a higher amount of CP180 extractant, higher extraction costs, and it will also make it difficult for the copper extraction process to proceed smoothly, resulting in the discharge of a large amount of waste liquid , causing environmental pollution

[0003] For this reason, in the prior art, someone adopts HF, NH 4 F or (NH 4 ) 2 SO 4 After the aqueous solution washes and regenerates the poisoned and aged Cp180, the extraction function of CP180 on copper is restored, and then the CP180 is returned to the extraction system for further extraction of copper, thereby reducing the discharge of waste liquid, reducing the environmental pollution rate and the The cost of the separation of Ge, Cu, and Zn in materials containing Ge, Cu, and Zn; however, the use of this technology for regeneration will bring in fluorine, which will cause a small amount of waste liquid to be discharged to pollute the environment, and wash CP180 It is difficult to recycle the washing liquid after treatment, which has caused new pollution to the environment. At the same time, the extraction capacity of CP180 after treatment with this regeneration treatment technology can only recover 50-80%, which leads to repeated The number of times of recycling is low, and the CP180 extractant will still be updated in the end, resulting in incomplete regeneration of CP180; therefore, some people use 1-3% NaOH aqueous solution or a mixed solution of NaOH and (NH4)2SO4 for washing and regeneration. However, this treatment technology produces serious emulsification in the washing section, and phase separation is difficult, and the ability of the regenerated Cp180 to recover and extract Cu can only reach about 80%.