Method for enriching and extracting gallium from alumina seed precipitation mother liquor on basis of biomass material

A biomass material and alumina technology, applied in the field of enrichment and extraction of gallium, can solve the problems of high cost and poor adsorption selectivity, and achieve the effect of low cost, simple operation and easy large-scale industrial application

Active Publication Date: 2021-08-13
CHINA UNIV OF MINING & TECH +1
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  • 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

Method used

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  • Method for enriching and extracting gallium from alumina seed precipitation mother liquor on basis of biomass material
  • Method for enriching and extracting gallium from alumina seed precipitation mother liquor on basis of biomass material
  • Method for enriching and extracting gallium from alumina seed precipitation mother liquor on basis of biomass material

Examples

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-enriched dynamic adsorption column 2 at a rate of 10BV / h. When the gallium concentration at the inlet and outlet of the gallium-enriched 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 1.5 mol / L (the molar ratio of hydrochloric acid and thiourea is 50:1), flow reversely into the gallium...

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Abstract

The invention discloses a method for enriching and extracting gallium from alumina seed precipitation mother liquor on the basis of a biomass material. The method comprises the following steps that the biomass material is taken as an adsorbent, and the biomass material is a persimmon peel-based imprinted composite material obtained by modifying persimmon peel through an ion imprinting technology; and the persimmon peel-based imprinted composite material is loaded into two stages of dynamic adsorption columns, and gallium in the alumina seed precipitation mother liquor is selectively adsorbed and desorbed through a gallium extraction dynamic adsorption column 1 and a gallium enrichment dynamic adsorption column 2 to obtain a gallium-rich electrolytic stock solution. According to the method, the waste biomass persimmon peel serves as a material, the adsorbent is obtained through surface ion imprinting modification, selective extraction of gallium in the alumina seed precipitation mother liquor is achieved through gallium ion specific recognition sites on the surface of the adsorbent, and the method has the advantages of being low in gallium enrichment cost, high in efficiency and the like and has good economic benefits 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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IPC IPC(8): C22B58/00C22B7/00C25C1/22
CPCC22B58/00C22B7/005C25C1/22Y02P10/20
Inventor 高丽慧李树磊曹亦俊王立章牛沉沉李玲妮柴娜刘恒峰
Owner CHINA UNIV OF MINING & TECH
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