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Preparation method of amphoteric ion exchange resin for extracting precious metal through hydrometallurgy

A technology of amphoteric ion and exchange resin, which is applied in the direction of amphoteric ion exchange, ion exchange, chemical instruments and methods, etc. It can solve the problems of harsh resin regeneration conditions and low adsorption capacity, and achieve good mechanical strength, large specific surface area, and good adsorption performance effect

Pending Publication Date: 2022-04-12
JIANGSU JINSHAN NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the application of the existing weak base anion exchange resin in the gold extraction process, the regeneration conditions of the resin are relatively harsh, and toxic gases are generated under acidic conditions, and other metal elements such as zinc, nickel, copper, and iron are also attached during the adsorption process, and the adsorption capacity is not high. high

Method used

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  • Preparation method of amphoteric ion exchange resin for extracting precious metal through hydrometallurgy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Prepare polymer microspheres, add 100g deionized water, 10g magnesium sulfate, 10g sodium carbonate, 1.5g sodium lignosulfonate, 1.5g hydroxyethyl cellulose, 3g sodium chloride in a 3L three-necked flask, 3g sodium nitrite;

[0025] 100 g of styrene, 10 g of divinylbenzene, 0.1 g of benzoyl peroxide, and 70 g of isobutanol were added again. After the oil phase and the water phase are mixed, the temperature is controlled at 60°C, the mechanical stirring speed is 117 rpm, and the particle size is adjusted; the temperature is raised to 80°C and kept for 1 hour; the temperature is raised to 82°C and kept for 4 hours; the temperature is raised to 90°C for distillation , remove the porogen, wash with hot water multiple times, dry and sieve to obtain polymer microspheres;

[0026] 2) The polymer microspheres are subjected to chloromethylation, the polymer microspheres are placed in 200g of chloromethyl ether, 50g of anhydrous zinc chloride is added, 20g of sulfuric acid is...

Embodiment 2

[0030] 1) Prepare polymer microspheres, add 100g deionized water, 0.5g magnesium sulfate, 0.5g sodium carbonate, 0.05g sodium lignosulfonate, 0.05g hydroxyethyl cellulose, 20g chloride Sodium, 5g sodium nitrite;

[0031] 100 g of styrene, 1 g of divinylbenzene, 8 g of benzoyl peroxide, and 20 g of isobutanol were added again. After the oil phase and the water phase are mixed, the temperature is controlled at 60°C, the mechanical stirring speed is 117 rpm, and the particle size is adjusted; the temperature is raised to 80°C and kept for 1 hour; the temperature is raised to 82°C and kept for 4 hours; the temperature is raised to 90°C for distillation , remove the porogen, wash with hot water multiple times, dry and sieve to obtain polymer microspheres;

[0032] 2) The polymer microspheres are subjected to chloromethylation, the polymer microspheres are placed in 200g of chloromethyl ether, 10g of anhydrous zinc chloride is added, 70g of sulfuric acid is added dropwise while sti...

Embodiment 3

[0036] 1) Prepare polymer microspheres, add 100g deionized water, 5g magnesium sulfate, 5g sodium carbonate, 1g sodium lignosulfonate, 1g hydroxyethyl cellulose, 10g sodium chloride, 4g sodium bicarbonate in a 3L three-necked flask sodium nitrate;

[0037] 100 g of styrene, 5 g of divinylbenzene, 4 g of benzoyl peroxide, and 45 g of isobutanol were added again. After the oil phase and the water phase are mixed, the temperature is controlled at 60°C, the mechanical stirring speed is 117 rpm, and the particle size is adjusted; the temperature is raised to 80°C and kept for 1 hour; the temperature is raised to 82°C and kept for 4 hours; the temperature is raised to 90°C for distillation , remove the porogen, wash with hot water multiple times, dry and sieve to obtain polymer microspheres;

[0038] 2) The polymer microspheres are subjected to chloromethylation, the polymer microspheres are placed in 200g of chloromethyl ether, 30g of anhydrous zinc chloride is added, 45g of sulfu...

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Abstract

The invention discloses a preparation method of amphoteric ion exchange resin for hydrometallurgy extraction of precious metals, which comprises the following steps: preparing polymer microspheres, and adding an aminating agent into the microspheres for action to obtain aminated microspheres; and introducing weak acid groups into the aminated microspheres to obtain the amphoteric ion exchange resin. According to the method, the resin which is high in selectivity, high in exchange capacity and easy to resolve is obtained.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of amphoteric ion exchange resin for extracting precious metals by hydrometallurgy. Background technique [0002] Existing thiourea chelating resins, isothiourea chelating resins, and mercapto chelating resins can be used in acidic solutions to extract precious metals such as platinum, palladium, gold, etc., but the metal adsorption is not high. The existing patent number is CN202110303813.8 A preparation method of macroporous weak base anion exchange resin for gold extraction, which discloses the preparation of cross-linked polymer microsphere matrix by suspension polymerization technology; Carry out chloromethylation reaction to prepare chloromethylated crosslinked styrene-divinylbenzene; further perform amination reaction on chloromethylated crosslinked styrene-divinylbenzene under the action of an aminolysis reagent to obtain a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J43/00C22B3/24C22B11/00
Inventor 张结来顾林
Owner JIANGSU JINSHAN NEW MATERIAL CO LTD
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