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Recovery method of copper indium gallium selenide

The technology of a copper indium gallium selenide and a recycling method is applied in the direction of improving the process efficiency and the like, which can solve the problems of long process time and complicated recycling process, and achieve the effects of simplifying the process, shortening the process time, and reducing the process cost.

Inactive Publication Date: 2011-12-28
SOLAR APPLIED MATERIALS TECHNOLOGY CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The method disclosed in the present invention can solve the problems of complex recovery process and long process time of copper, indium, gallium and selenium in the aforementioned known technology

Method used

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  • Recovery method of copper indium gallium selenide
  • Recovery method of copper indium gallium selenide
  • Recovery method of copper indium gallium selenide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Copper Indium Gallium Selenium Dissolving Steps

[0056] First, pour the metal powder made of copper indium gallium selenide residual target into 10N hydrochloric acid solution, and then slowly add the mixed solution of hydrochloric acid and hydrogen peroxide with a volume ratio of 10:1 to dissolve, the above metal powder The dissolution rate reaches 98.5%. The solution obtained by filtering and removing the undissolved metal powder in the solution with a dissolution rate of 98.5% is the first solution.

[0057] Hydrazine reduction of selenium step

[0058] A hydrazine solution is provided, comprising 1 to 3 equivalents of hydrazine. After slowly adding the hydrazine solution to the first solution, the solution gradually changed from transparent to reddish brown and the solution was cloudy. After another 21 hours of reaction, the elemental selenium and the hydrochloric acid solution containing copper indium gallium are filtered to separate the selenium, and a second ...

Embodiment 2

[0066] The experimental operation of this example is the same as that of Example 1, the only difference being that the volume ratio of hydrochloric acid to hydrogen peroxide in the mixed solution used is 10:2 instead of 10:1.

[0067] The recovery rates of recovered copper, indium, gallium and selenium are respectively about 99.4, 99.2, 99.2 and 99.4% after conversion.

Embodiment 3

[0069] The experimental operation of this example is the same as that of Example 1, the only difference being that the volume ratio of hydrochloric acid to hydrogen peroxide in the mixed solution used is 10:3 instead of 10:1.

[0070] The recovery rates of recovered copper, indium, gallium and selenium are about 99.5, 99.3, 99.2 and 99.9% respectively after conversion.

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Abstract

A recovery method for copper indium gallium selenide. The method includes firstly using a mixed solution of hydrochloric acid and hydrogen peroxide to dissolve the metal powder containing CIGS. After selenium is separated using hydrazine, copper is replaced by indium metal. Finally, indium and gallium are separated by a supported liquid membrane (SLM) combined with a dispersed stripping solution. The acid used in all the steps of the method is hydrochloric acid, so the copper indium gallium selenium can be separated one by one without the conversion of the solution during the operation, effectively reducing the process time and cost.

Description

technical field [0001] The invention relates to a recovery method of copper indium gallium selenide, and in particular to a recovery method combined with a supported liquid film. Background technique [0002] Due to its high photoelectric efficiency, copper indium gallium selenide (CIGS) thin film solar cells are considered to have great potential for development. However, whether the method of making copper indium gallium selenide thin-film solar cells is vacuum sputtering, evaporation or non-vacuum coating, in order to reduce costs and meet the needs of environmental protection, copper, indium, gallium and selenium need to be recycled and processed. Refining procedure. Therefore, how to separate and recover copper, indium, gallium and selenium from the waste (liquid) is a technology that needs to be developed urgently. [0003] The method that is generally used for reclaiming selenium, for example, once disclosed in No. US-3954951 of U.S. Patent No. low temperature (-20 ...

Claims

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Application Information

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IPC IPC(8): C22B3/10C22B3/38C22B15/00C22B58/00
CPCY02P10/20
Inventor 连建洲黄逸文李重庆陈海瑞
Owner SOLAR APPLIED MATERIALS TECHNOLOGY CORPORATION
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