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New method for extracting gallium from Bayer mother liquor through chelating resin

A technology of chelating resin and Bayer mother liquor, which is applied in the field of gallium extraction, to achieve the effects of cost saving, high gallium content and good gallium recovery rate

Active Publication Date: 2013-11-20
SUNRESIN NEW METERIALS CO LTD XIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the early stage of chelating resin use, due to the large adsorption capacity of chelating resin, generally 3.5g / L and above, when NaOH-Na2S eluent is used to desorb the chelating resin, its The desorption efficiency is only about 60%, the residual gallium content on the resin is high, and the resin utilization rate is reduced

Method used

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  • New method for extracting gallium from Bayer mother liquor through chelating resin
  • New method for extracting gallium from Bayer mother liquor through chelating resin
  • New method for extracting gallium from Bayer mother liquor through chelating resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Get 500ml of LSC-600 resin and pack it into an exchange column as a gallium extraction resin column. The Bayer mother liquor with a gallium concentration of 246 mg / L flows through the gallium extraction resin column at a flow rate of 4L / h until the resin reaches adsorption saturation, then wash with water until the resin The pH of the effluent from the column was 9.2, and the gallium adsorption capacity of the saturated resin was measured to be 4 g / L. Put 500ml of 001×7 resin in the exchange column as a gallium-rich resin column, and add 2.5L of citric acid solution of pH 1.2 into a 3L glass beaker as a buffer tank. Connect the saturated gallium extraction resin column to the gallium enrichment resin column and buffer tank in series, use a pump to control the citric acid solution to circulate at 15°C at a flow rate of 1.5L / h, and use a 3N citric acid solution to adjust the buffer The pH of the acid solution in the tank so that it remains around pH 1.2. When the gallium...

Embodiment 2-7

[0036] Get 500ml of LSC-600 resin and pack it into the exchange column as the gallium extraction resin column. The Bayer mother liquor with a gallium concentration of 259mg / L flows through the gallium extraction resin column at a flow rate of 3L / h until the resin reaches adsorption saturation. The pH of the effluent was 9.0, and the gallium adsorption capacity of the saturated resin was measured to be 4 g / L. Put 500ml of D001 resin in the exchange column as a gallium-rich resin column, and add 2.5L of phosphoric acid solution with a pH of 1.0 into a 3L glass beaker as a buffer tank. Connect the saturated gallium extraction resin column to the gallium enrichment resin column and the buffer tank in series, and use a pump to control the flow rate of the phosphoric acid solution at 1.0L / h, so that it is at 0°C, 5°C, 10°C, 15°C, and 20°C respectively. ℃, 35 ℃ cycle operation. Use a phosphoric acid solution with a concentration of 4N to adjust the pH value of the solution in the bu...

Embodiment 8-13

[0040] Take 3L of LSC-600 resin and put it into the exchange column as the gallium extraction resin column. The Bayer mother liquor with a gallium concentration of 240mg / L flows through the gallium extraction resin column at a flow rate of 10L / h until the resin reaches adsorption saturation. The pH of the effluent was 9.0, and the gallium adsorption capacity of the saturated resin was measured to be 4g / L, which was evenly distributed in 6 exchange columns. 500ml of D001 resin was loaded into the other 6 exchange columns as gallium-rich resin columns, and 2.5L of hydrochloric acid solution with pH values ​​of 0, 0.1, 0.5, 1.5, 2.5, and 3 were added to 6 3L glass beakers as Buffer tank. The saturated gallium extraction resin column was connected in series with the gallium enrichment resin column and the buffer tank, and the acid solution was controlled by a pump at a flow rate of 1.0 L / h to make it circulate at 20°C. Use a hydrochloric acid solution with a concentration of 3.5N...

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Abstract

The present invention discloses a new method for extracting gallium from Bayer mother liquor through chelating resin. The method comprises the following steps that: (1) gallium extracting resin is filled into a resin column, the Bayer mother liquor containing the gallium flows through the gallium extracting resin column to enable the gallium extracting resin to achieve adsorption saturation; (2) the saturated gallium extracting resin is washed through water; (3) a prepared acid solution is filled in a buffer tank, and forms a series connection with the gallium extracting resin column and a gallium enriching resin column; the acid solution in the buffer tank is controlled through a pump, sequentially flows through the extracting resin column and the enriching resin column, and finally flows back to the buffer tank, the operations are circularly performed; (4) when the gallium enriching resin achieves adsorption saturation, an alkaline solution is adopted for desorption of the gallium enriching resin; (5) the resulting desorption solution of the gallium enriching resin is directly subjected to electrolysis to obtain the metal gallium. According to the present invention, with the method provided by the present invention, the disadvantages in the prior art are overcome; the method has advantages of high desorption efficiency, good gallium recovery rate and the like; the obtained desorption solution has high gallium content; the pretreatment process of the electrolysis is simple; the cost can be substantially saved.

Description

technical field [0001] The invention relates to a new method for extracting gallium, in particular to a new method for extracting gallium from Bayer mother liquor with chelating resin. Background technique [0002] Gallium is a rare metal that plays an important role in the semiconductor industry, and the demand for gallium metal continues to increase year after year. However, sources of gallium metal are scarce, and most of its products come from by-products such as the aluminum industry. Bauxite usually contains 0.002-0.008% gallium metal. During the production of alumina by the Bayer process, about 70% of the gallium metal in the bauxite is leached together with the alumina, and about 30% remains in the red mud. With the circulation of the mother liquor, the concentration of gallium metal in the mother liquor of the Bayer process can accumulate to 100-300ppm. [0003] Extracting gallium metal with chelating resin has become the main way to extract gallium from the alu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/24C25C1/22
CPCY02P10/20
Inventor 寇晓康李岁党刘琼
Owner SUNRESIN NEW METERIALS CO LTD XIAN
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