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A method for enriching and extracting gallium from alumina seed separation mother liquor based on biomass materials

A biomass material, alumina technology, applied in the field of enrichment and extraction of gallium, can solve the problems of poor adsorption selectivity and high cost, and achieve the effects of low cost, simple operation, good economic and environmental benefits

Active Publication Date: 2022-04-05
CHINA UNIV OF MINING & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose a method for enriching and extracting gallium from alumina seed separation mother liquor based on biomass materials, so as to solve the problems of high cost and poor adsorption selectivity in the gallium extraction process

Method used

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  • A method for enriching and extracting gallium from alumina seed separation mother liquor based on biomass materials
  • A method for enriching and extracting gallium from alumina seed separation mother liquor based on biomass materials
  • A method for enriching and extracting gallium from alumina seed separation mother liquor based on biomass materials

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: the preparation of biomass material

[0034] (1) Using surface imprinting technology, using persimmon tannin on the surface of persimmon skin as a functional monomer, Ga 3+ As a template, under the action of cross-linking agent glutaraldehyde, persimmon tannin cross-linked polymer was coated on the surface of persimmon skin: take 0.4 g of dried persimmon skin with a particle size of less than 74 μm, add 30 mL of GaCl with a concentration of 0.05 mol / L 3 solution, stirred for 2 h, then added 2 mL of cross-linking agent glutaraldehyde, and stirred for 24 h in a water bath at 55 °C.

[0035] (2) After the product obtained in step (1) is washed with deionized water, it is put into a HCl solution with a concentration of 1mol / L and soaked for 2 hours until no Ga is detected in the soaking solution. 3+ , and then rinsed with deionized water and dried to obtain a persimmon skin imprinted composite material.

[0036] figure 2 It is the SEM picture of the persim...

Embodiment 2

[0037] Example 2: The dynamic adsorption performance of biomass materials to gallium in alumina seed separation mother liquor

[0038] Implementation steps such as figure 1 shown.

[0039] (1) The biomass material that embodiment 1 obtains is packed in the dynamic glass adsorption column that column length is 300mm, internal diameter 10mm, obtains gallium and extracts dynamic adsorption column 1, makes the aluminum oxide species derivation mother liquor that gallium concentration is 187mg / L in At 40°C, flow through the gallium extraction dynamic adsorption column 1 at a rate of 10BV / h. After 13.3 hours, the gallium concentration at the outlet of the gallium extraction dynamic adsorption column 1 is basically the same as the gallium concentration in the alumina seed separation mother liquor, and the adsorption is stopped;

[0040] (2) With a pump, the HCl solution with a concentration of 1mol / L flows forward through the gallium extraction dynamic adsorption column 1 of step (1...

Embodiment 3

[0042] Example 3: The adsorption performance of biomass material to gallium extraction dynamic adsorption column 1 desorption liquid

[0043] Implementation steps such as figure 1 shown.

[0044](1) The biomass material obtained in Example 1 is packed into a dynamic glass adsorption column with a column length of 300 mm and an internal diameter of 10 mm to obtain gallium-enriched dynamic adsorption column 2, and the acidic desorption solution obtained in Example 2 with concentrated hydrochloric acid Adjust the acid concentration to 6mol / L, and flow through the gallium-enrichment dynamic adsorption column 2 at a rate of 10BV / h. When the gallium concentration at the inlet and outlet of the gallium-enrichment dynamic adsorption column 2 is the same, the adsorption is stopped;

[0045] (2) Use a hydrochloric acid-thiourea desorption solution with a hydrochloric acid concentration of 1.5mol / L (the molar ratio of hydrochloric acid and thiourea is 50:1), flow reversely at 40°C into ...

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Abstract

The invention discloses a method for enriching and extracting gallium from alumina seed separation mother liquor based on biomass materials. The method includes: using biomass materials as adsorbents, and the biomass materials are persimmon skins modified by ion imprinting technology The obtained persimmon skin-based imprinted composite material; the persimmon skin-based imprinted composite material is loaded into a two-stage dynamic adsorption column, and the alumina seed separation mother liquor is extracted through the gallium-extracted dynamic adsorption column 1 and the gallium-enriched dynamic adsorption column 2 respectively. Gallium-rich electrolytic stock solution is obtained by selective adsorption and desorption of gallium. In the present invention, waste biomass persimmon skin is used as the material, and the adsorbent is obtained through surface ion imprinting modification, and the gallium ion-specific recognition sites on the surface of the adsorbent are used to realize the selective extraction of gallium in the mother liquor of alumina species, which has the advantages of Gallium enrichment has the advantages of low cost and high efficiency, and has good economic and environmental benefits.

Description

technical field [0001] The invention relates to a method for extracting and enriching gallium, in particular to a method for enriching and extracting gallium from alumina seed liquor based on biomass materials. Background technique [0002] Gallium is an important scattered metal, which has become an important supporting material for the development of new technologies in the fields of national defense, aerospace, pharmaceutical industry, and communication electronics. The content of gallium is small and the distribution is relatively scattered, and it exists in the form of associated minerals with other metal elements. Due to the trace associated relationship, the level of enrichment and extraction of gallium resources is low, and the production of gallium cannot be increased, and there will be a serious shortage in the next 20-30 years. In the gallium enrichment extraction process, about 90% of the primary gallium is extracted from the alumina production process. The gal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B58/00C22B7/00C25C1/22
CPCC22B58/00C22B7/005C25C1/22Y02P10/20
Inventor 李树磊高丽慧曹亦俊王立章李玲妮柴娜刘恒峰
Owner CHINA UNIV OF MINING & TECH
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