Immobilized tannin for enriching rare scattered metal, preparation method and method for enriching rare scattered metal by using the immobilized tannin

A sparse metal enrichment technology, which is applied in the field of its preparation, enrichment of immobilized tannin of scattered metal, and enrichment of tannin of scattered metal, can solve the problems of increasing residual amount, increasing pollution load, increasing consumption, etc.

Active Publication Date: 2020-06-05
THE RES INST OF RESOURCES INSECTS RIRI OF THE CHINESE ACADEMY OF FORESTRY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the good water solubility of emblica tannin tends to increase its residual amount in the ore acid leach solution after complexing germanium, which increases the pollution load while increasing the consumption

Method used

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  • Immobilized tannin for enriching rare scattered metal, preparation method and method for enriching rare scattered metal by using the immobilized tannin
  • Immobilized tannin for enriching rare scattered metal, preparation method and method for enriching rare scattered metal by using the immobilized tannin
  • Immobilized tannin for enriching rare scattered metal, preparation method and method for enriching rare scattered metal by using the immobilized tannin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Embodiment 1 prepares chitosan-acetic acid solution, tannin-acetic acid solution

[0073] 1. Preparation of chitosan-acetic acid solution

[0074] Add chitosan to the acetic acid solution, dissolve evenly, prepare chitosan-acetic acid solution, and set aside, wherein the mass ratio of chitosan to acetic acid solution is 1:(20-40) (preferably 1:30) ; The mass percent concentration of the acetic acid solution is usually 1-3% (preferably 2%);

[0075] Accurately weighed chitosan (3g) is dissolved in the acetic acid solution of 2% in 90g mass percentage concentration, dissolves evenly, is mixed with chitosan-acetic acid solution (93g), for subsequent use, wherein chitosan and acetic acid solution mass Ratio 1:30;

[0076] 2. Prepare tannin-acetic acid solution

[0077] Add emblica tannin into the acetic acid solution, dissolve evenly, and prepare a tannin-acetic acid solution for later use, wherein the mass ratio of emblica tannin to the acetic acid solution is 1:2-20 (pre...

Embodiment 2

[0080] Example 2 Preparation of immobilized emblica tannin (PEIT)

[0081] 1. Cross-linking reaction

[0082] Under stirring condition, the tannin-acetic acid solution (22g) that embodiment 1 prepares is joined in the chitosan-acetic acid solution (93g), after mixing, add mass percent concentration and be 5% (usually 0.2-5.0%) Glutaraldehyde solution (10g), wherein, the mass ratio of emblica tannin and chitosan is 1:1.5 (usually 1:(0.5-2.5), preferably 1:(1-2), more preferably 1:1.5); the mass ratio of glutaraldehyde to emblica tannin is 1:4 (usually 1:2-16, preferably 1:2-8, more preferably 1:2-4);

[0083] In the specific embodiment of the present invention, the mass percent concentration of the glutaraldehyde solution is 5% as an example, and other concentrations such as 0.2-5.0% are applicable to the present invention.

[0084] Then heat until the temperature is maintained at 55°C (usually 0-90°C, preferably 20-80°C), and adjust and control the pH value during the reacti...

Embodiment 2A

[0107] Embodiment 2A prepares immobilized emblical tannin (PEIT)

[0108] 1. Cross-linking reaction

[0109] Under stirring condition, the tannin-acetic acid solution (22g) that will prepare according to embodiment 1 method joins in the chitosan-acetic acid solution (62g), and wherein the ratio of the quality of emblica tannin and chitosan is 1: 1. After mixing, add 20g, 10g, 5g, 2.5g, 1.25g of glutaraldehyde solution with a mass percent concentration of 5% respectively, wherein the mass ratio of glutaraldehyde to emblical tannin is 1:2, 1:4, 1:8, 1:16, 1:32;

[0110] Then heat until the temperature is maintained at 55°C (usually 0-90°C, preferably 20-80°C), and adjust and control the pH value during the reaction with 0.1mol / L NaOH or / and 0.1mol / L HCl Be 4.0, carry out cross-linking reaction;

[0111] Wherein, tannin-acetic acid solution is prepared according to the method of Example 1, emblica tannin 2g, acetic acid solution 20g; chitosan-acetic acid solution is prepared a...

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PUM

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Abstract

The invention discloses immobilized tannin for enriching rare scattered metal, a preparation method thereof and a method for enriching rare scattered metal by using the immobilized tannin. Phyllanthusemblica tannin, gallnut tannin or tara tannin are fully mixed with chitosan and glutaraldehyde, and a cross-linking reaction is performed under a heating condition to prepare the immobilized tannin.The preparation method of the immobilized tannin has the advantages that the conversion rate is high; the prepared immobilized tannin for enriching the rare scattered metal has the advantages of strong stability, high adsorption activity, high mechanical strength and the like, is suitable for large-scale popularization and application, and reduces the scattered metal enrichment cost; moreover, rare scattered metal enriching adopting the immobilized tannin has the advantages of easiness in solid-liquid separation, insolubility in a mineral acid leaching solution, low residue and the like, the tannin residual quantity in a solution obtained after rare scattered metal ions are adsorbed and enriched is low, a subsequent smelting process is not interfered, and secondary pollution is not caused.

Description

technical field [0001] The invention relates to a tannin enriched with scattered metals, its preparation method and its application method, in particular to an immobilized tannin enriched with scattered metals, its preparation method and its method of enriching scattered metals, belonging to Sparse metal preparation field. Background technique [0002] Metal germanium (Ge), gallium (Ga), and indium (In) are rare dispersed metals, also known as scattered metals, which are widely used in semiconductors, optical fibers, solar panels, medicine and other fields. From 2015 to 2018, the United States, the United Kingdom, and the European Union have included germanium in the key mineral catalog and national strategic resources; due to the highly concentrated distribution of germanium resources in the world, it has a significant strategic position in the future competition between major powers. The average content of rare metals in the earth's crust is low, and it is difficult to fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C08B37/08B01D15/08C02F1/28C02F101/20C02F103/16
CPCB01J20/267B01D15/08C02F1/285C02F1/286C08B37/003B01J2220/4812B01J2220/4825C02F2101/20C02F2103/16Y02P10/20
Inventor 张雯雯陈赤清黄铖李坤毛业富冯运洋陈清龙张品德刘义稳张弘
Owner THE RES INST OF RESOURCES INSECTS RIRI OF THE CHINESE ACADEMY OF FORESTRY
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