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Method for recycling indium from solution containing indium and aluminium

A solution and acid solution technology, applied in the field of indium recovery, can solve the problems of low recovery rate, unacceptable, difficult filtration steps and the like, and achieve the effect of improving the recovery rate of indium

Active Publication Date: 2010-12-15
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since this method uses an alkaline solution to remove the aluminum ions originally present in the cleaning solution, the subsequent filtration step is not easy to carry out, resulting in a rather low recovery rate of indium (only 75% to 80%), which makes this A method of recycling indium is not easily accepted by the market

Method used

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  • Method for recycling indium from solution containing indium and aluminium
  • Method for recycling indium from solution containing indium and aluminium

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Embodiment Construction

[0025] figure 1 It is a flowchart of a method for recovering indium according to an embodiment of the present invention.

[0026] Please refer to figure 1 First, in step 100, a first acidic solution containing indium and aluminum is provided. The first acidic solution is, for example, an inorganic acid cleaning solution in the ITO process. The inorganic acid cleaning solution is, for example, nitric acid cleaning solution, hydrochloric acid cleaning solution, sulfuric acid cleaning solution or phosphoric acid cleaning solution, and the concentration of indium ion and aluminum ion contained therein is, for example, between 10000 ppm and 60000 ppm. In this embodiment, the indium content in the above-mentioned first acidic solution is, for example, smaller than the aluminum content. Of course, in other embodiments, the present invention can also be applied to acidic solutions whose indium content is greater than or equal to the aluminum content.

[0027] Then, in step 102, th...

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Abstract

The invention relates to a method for reclaiming indium from a solution containing indium and aluminum. The method comprises: firstly, providing a first acidic solution containing indium and aluminum; secondly, regulating the pH value of the first acidic solution and obtaining a first mixture containing indium hydroxide and aluminum hydroxide; thirdly, mixing the first mixture with a latent solvent, obtaining a second mixture which is heated and then is washed in water and filtered after the heat treatment, and obtaining filter cakes; fourthly, dissolving the filter mass in a second acidic solution; and finally, carrying out a replacing step and obtaining solid indium.

Description

【Technical field】 [0001] The invention relates to a method for recovering indium, and in particular to a method for recovering indium from a solution containing indium and aluminum. 【Background technique】 [0002] The content of indium metal in the earth's crust is very rare, and it is mainly distributed in zinc ore and cannot be mined independently. Therefore, zinc metal must be extracted first, and then indium can be extracted from the waste slag produced by refining zinc metal. [0003] With the rapid development of global digital technology, which in turn promotes the rapid growth of mobile communication and satellite digital transmission, and promotes the increase of parts of displays (such as liquid crystal displays (LCD)), the international market is more interested in indium tin oxide (indium tin oxide) -tin oxide, ITO) target demand doubled. Since the total international output of indium is about 300 tons, and the annual demand worldwide is about 500 tons, the int...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B58/00
CPCY02P10/20
Inventor 陈镱夫简正雄
Owner IND TECH RES INST