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Precipitation of Antimony and Bismuth from Copper Refinery Electrolyte Using PbO2

a technology of copper refinery and electrolyte, which is applied in the field of metal and non-metal mining, can solve the problems of slow kinetics and achieve the effect of fast kinetics

Inactive Publication Date: 2013-10-17
CIFUENTES GERARDO ALEXIS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a fast reaction between PbO7, Sb, and Bi in solution. This results in a decrease of more than 80% of the Sb present in the treated electrolyte within 5 to 10 minutes of contact.

Problems solved by technology

One of the main disadvantages of this method is its slow kinetics.

Method used

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  • Precipitation of Antimony and Bismuth from Copper Refinery Electrolyte Using PbO2
  • Precipitation of Antimony and Bismuth from Copper Refinery Electrolyte Using PbO2
  • Precipitation of Antimony and Bismuth from Copper Refinery Electrolyte Using PbO2

Examples

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example of application

[0043]A synthetic electrolyte with a concentration of 40 g / L of Cu2+, 180 g / L of H2SO4, and 200 ppm of Sb was considered, to which were added different amounts of PbO2 previously activated with hydrogen peroxide (H2O2) if necessary. The masses of PbO2 considered were 15, 10, 5, 2.5, 1.25 and 0.625 g for each of the synthetic solutions prepared (approximately 170 cm3 of each), which were allowed to react in a reactor with stirring during a period of 30 minutes at a temperature of 65° C., then removing and labelling a sample of each solution for its chemical analysis with the purpose of determining the drop of the Sb concentration in the electrolyte.

Extraction Efficiency of PbO2

[0044]For the first experiment, in which the extraction efficiency of Sb by PbO2 was established, the results of the chemical analysis are given in Table 4 together with FIG. 1, which is a graph of the extraction efficiency of Sb vs. the added mass of lead dioxide.

TABLE 4Results of the chemical analysis of the...

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Abstract

The invention is suitable for use in metal and nonmetal mining and in general, in any area of operation containing Sb and Bi in solution in an electrolyte based mainly on sulfuric acid. The system consists in contacting solid lead dioxide (PbO2), which can be activated superficially with an oxidizing agent, for example hydrogen peroxide (H2O2), to increase its reactivity, with an acid electrolyte that contains Sb and Bi in solution, with the purpose of causing a decrease in the content of soluble Sb and Bi present in the liquid phase, forming insoluble compounds based on Pb—Sb and Pb—Bi. With this invention the presence of Sb and Bi in solution is reduced by at least 70%.

Description

TECHNICAL FIELD OF THE INVENTION[0001]The invention has its field of application in metal and nonmetal mining, and in general in any action field in which Sb and Bi are present in solution in an electrolyte based mainly on sulfuric acid.BACKGROUND OF THE INVENTION[0002]This invention is an extension of Patent No. 519-2005 Registry No. 45.037, called: “Method for decreasing the content of soluble antimony in an electrolyte, which comprises putting in contact lead oxide with an acid electrolyte that contains antimony in solution, leading to insoluble Pb—Sb based compounds.” Getting a high quality copper cathode implies among other things a cathode free of impurities. The copper electrorefining process is aimed at eliminating these impurities from the copper anode (99.5% purity) through a process of disolving it in an electrolyte by means of chemical and electrochemical reactions. This process yields as a product a cathode (99.99% purity). (W. G. Davenport, M. King, M. Schlesinder and ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C22B3/44
CPCC22B3/44C22B15/0089C22B30/02C22B30/06Y02P10/20
Inventor CIFUENTES, GERARDO ALEXISSIMPSON, JAIME ROBERTOVARGAS, CRISTIAN ALEJANDRO
Owner CIFUENTES GERARDO ALEXIS