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Solid-phase extraction method for separating enriched gallium

A solid-phase extraction, separation and enrichment technology, applied in the field of separation and enrichment of gallium by solid-phase extraction, can solve the problems of high cost, complicated operation, low separation recovery rate, etc., and achieve the effect of high recovery rate and cost saving.

Inactive Publication Date: 2013-03-13
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many methods for separating and enriching gallium, including solvent extraction, resin extraction and ion exchange, etc. These methods mainly have the following problems: the selective separation of gallium and aluminum by solvent extraction is not ideal, and the The separation recovery rate is low, and a large amount of organic solvents are used in the extraction process, which is costly and easy to cause pollution to the environment; although the extraction resin method and ion exchange column chromatography have significantly improved the separation effect compared with the solvent extraction method, but The operation is cumbersome and time-consuming, especially the resin extraction method, there are still problems such as the small capacity of the extraction resin and the easy loss of the extraction agent in the resin.
Although the extraction efficiency of this method has been improved, and the extraction effect is also good, it also uses an organic solvent as the extraction agent, which has a large environmental pollution and a complicated process.

Method used

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  • Solid-phase extraction method for separating enriched gallium

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Comparison scheme
Effect test

Embodiment 1

[0028] The solid-phase extraction method of separating and enriching gallium of the present invention is as follows:

[0029] (1) Activation of strong basic anion exchange fibers: Weigh 10 g of unused strong basic anion exchange fibers, soak them in deionized water for 24 hours, squeeze out the water; then use 2.0 mol L -1 Stir and soak in HCl for 30 minutes, squeeze dry; then wash with deionized water until neutral, squeeze dry; after squeezing, use 2.0 mol L -1Stir and soak in NaOH for 30 minutes, then wash with deionized water until neutral, and squeeze dry; repeat the above acid-base washing process twice, then soak in absolute ethanol for 4 hours, and wash the strong alkaline anion exchange fiber with deionized water ethanol, squeezed dry, and then put it in a drying oven at 40 ℃ to dry; the strong basic anion exchange fiber after drying was re-used with 3.0 mol·L -1 Soak in HCl for 3 hours, then wash with deionized water until neutral, squeeze out the water, and dry it ...

Embodiment 2

[0037] The solid-phase extraction method of separating and enriching gallium of the present invention is as follows:

[0038] (1) Activation of strong basic anion exchange fibers: Weigh 10 g of unused strong basic anion exchange fibers, soak them in deionized water for 48 hours, squeeze out the water; then use 1.0 mol L -1 Stir and soak in HCl for 60 minutes, squeeze dry; then wash with deionized water until neutral, squeeze dry; after squeezing, use 1.0 mol L -1 Stir and soak in NaOH for 60 minutes, then wash with deionized water until neutral, and squeeze dry; repeat the above acid-base washing process twice, then soak in absolute ethanol for 2 hours, and wash the strong alkaline anion exchange fiber with deionized water ethanol, squeezed dry, and then put it in a vacuum oven at 35 ℃ to dry; after drying, the strongly basic anion exchange fiber was re-used with 2.0 mol·L -1 Soak in HCl for 4 hours, then wash with deionized water until neutral, squeeze out the water, and dry...

Embodiment 3

[0046] The solid-phase extraction method of separating and enriching gallium of the present invention is as follows:

[0047] (1) Activation of strong basic anion exchange fibers: Weigh 10 g of unused strong basic anion exchange fibers, soak them in deionized water for 20 hours, squeeze out the water; then use 3.0 mol L -1 Stir and soak in HCl for 20 minutes, squeeze dry; then wash with deionized water until neutral, squeeze dry; after squeezing, use 3.0 mol L -1 Stir and soak in NaOH for 20 minutes, then wash with deionized water until neutral, and squeeze dry; repeat the above acid-base washing process twice, then soak in absolute ethanol for 6 hours, and wash the strong alkaline anion exchange fiber with deionized water ethanol, squeezed dry, and then put it in a drying oven at 45 ℃ to dry; after drying, the strongly basic anion exchange fiber was refilled with 4.0 mol·L -1 Soak in HCl for 2 hours, then wash with deionized water until neutral, squeeze out the water, and dr...

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Abstract

The invention discloses a solid-phase extraction method for separating enriched gallium for separating enriched gallium. The method comprises the following steps: preparing gallium-containing material liquid from a gallium-containing sample, performing solid-phase extraction of gallium in the gallium-containing material liquid by activated strongly basic anion exchange fibers to obtain strongly basic anion exchange fibers loaded with gallium, then washing and eluting the obtained strongly basic anion exchange fibers loaded with gallium to obtain a gallium-enriched solution. The method can realize gallium recovery with a recovery rate of up to more than 99%. The used strongly basic anion exchange fibers are regenerable, and can be used repeatedly. The method is environment friendly, and is not easy to cause environment pollution.

Description

technical field [0001] The invention belongs to a method for separating and enriching gallium by a wet method, in particular to a method for separating and enriching gallium by a solid-phase extraction method. Background technique [0002] Gallium, as an extremely valuable rare metal, has been widely used in the fields of semiconductor materials, chemical process catalysis and medicine. Gallium has no independent deposits in nature, and is often associated with aluminum, iron, zinc, germanium and other metal minerals. Among them, the amount of gallium associated with bauxite is the largest, and about 90% of gallium in the world is produced from alumina Extracted from the mother liquor in the process or the recycled waste liquor. Gallium and aluminum belong to the third main group elements, and their chemical properties are very similar. The biggest difficulty in extracting gallium lies in the enrichment of gallium and its separation from a large number of intergrowth eleme...

Claims

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Application Information

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IPC IPC(8): C22B3/24C22B58/00C22B1/00C22B3/06
CPCY02P10/20
Inventor 龚琦韦小玲吴静娜
Owner GUANGXI UNIV