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A kind of preparation process of macroporous adsorption resin for precious metal and rare metal extraction

A technology of rare metals and preparation process, which is applied in the direction of improvement of process efficiency, chemical instruments and methods, and other chemical processes, and can solve problems that affect the recovery rate of precious metals and rare metals, increase recovery costs, and consume a large amount of organic solvents.

Active Publication Date: 2022-07-12
安徽皖东树脂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The extraction recovery method has the problem of a large amount of organic solvent and the subsequent recovery of organic solvents requires distillation operations, which increases the cost of recovery, and many organic solvents are toxic and will pollute the working environment
Although the adsorption recovery method can solve the above-mentioned problems in the extraction recovery method, it is difficult to resolve the adsorbed precious metals and rare metals during analysis, thereby affecting the recovery rate of precious metals and rare metals; , then there is also the problem that subsequent eluent recovery still needs to go through distillation operation, thus increasing the recovery cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) preparation of white ball: add 1g polyvinyl alcohol and 25g distilled water to the reaction vessel, and be warming up to 70 ℃ of insulation stirring for 15min, then add 13g cinnamaldehyde, 8g divinylbenzene, 20g toluene and 0.8g dibenzoyl peroxide Acyl, continue to heat up to 80 ℃ and keep stirring for 5 hours. After the reaction is completed, the temperature is naturally cooled to 30 ℃, and the microspheres are filtered out; the microspheres are rinsed with 30 g of ethanol to remove impurities and residual toluene, and then washed with 50 g of water to remove the ethanol, and drained. get a white ball;

[0021] (2) alkylation reaction of white spheres: add above-mentioned prepared white spheres, 13g 3-hydroxycaproic acid and 13g aluminium trichloride to 50g ethanol, and under microwave irradiation, alkylation reaction occurs for 10min, microwave frequency 2450MHz, The microwave power was 500W, and after the reaction was completed, it was filtered, washed with 50 g ...

Embodiment 2

[0024] (1) preparation of white ball: add 1g polyvinyl alcohol and 25g distilled water to the reaction vessel, and be warming up to 70 ℃ of insulation stirring for 15min, then add 12g cinnamaldehyde, 10g divinylbenzene, 20g toluene and 0.8g dibenzoyl peroxide Acyl, continue to heat up to 80 ℃ and keep stirring for 5 hours. After the reaction is completed, the temperature is naturally cooled to 30 ℃, and the microspheres are filtered out; the microspheres are rinsed with 30 g of ethanol to remove impurities and residual toluene, and then washed with 50 g of water to remove the ethanol, and drained. get a white ball;

[0025] (2) alkylation reaction of white spheres: add above-mentioned prepared white spheres, 13g 3-hydroxycaproic acid and 13g aluminium trichloride to 50g ethanol, and under microwave irradiation, alkylation reaction occurs for 10min, microwave frequency 2450MHz, The microwave power was 500W, and after the reaction was completed, it was filtered, washed with 50 g...

Embodiment 3

[0028] The aluminum trichloride in Example 1 was replaced with an equivalent amount of ferrocene, and the remaining operations were the same as those in Example 1.

[0029] (1) preparation of white ball: add 1g polyvinyl alcohol and 25g distilled water to the reaction vessel, and be warming up to 70 ℃ of insulation stirring for 15min, then add 13g cinnamaldehyde, 8g divinylbenzene, 20g toluene and 0.8g dibenzoyl peroxide Acyl, continue to heat up to 80 ℃ and keep stirring for 5 hours. After the reaction is completed, the temperature is naturally cooled to 30 ℃, and the microspheres are filtered out; the microspheres are rinsed with 30 g of ethanol to remove impurities and residual toluene, and then washed with 50 g of water to remove the ethanol, and drained. get a white ball;

[0030] (2) Alkylation reaction of white balls: add above-mentioned white balls, 13g 3-hydroxyhexanoic acid and 13g ferrocene to 50g of ethanol, and alkylation reaction takes place under microwave irrad...

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PUM

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Abstract

The invention discloses a preparation process of a macroporous adsorption resin for precious metal and rare metal extraction, relates to the technical field of macroporous adsorption resin processing, and includes the following process steps: (1) preparation of white spheres; (2) alkylation reaction of white spheres . In the present invention, cinnamaldehyde is used as a monomer instead of styrene commonly used in the field, and resin white balls are prepared by cooperating with a crosslinking agent divinylbenzene, a porogen toluene and an initiator; and 3-hydroxycaproic acid is used as an alkylating agent, The alkyl carboxylic acid group is introduced into the cinnamaldehyde benzene ring structure of the resin white ball through the alkylation reaction, and the prepared macroporous adsorption resin is more suitable for the extraction of precious metals and rare metals. When the precious metal gold is extracted, the recovery rate of gold can reach more than 99%.

Description

Technical field: [0001] The invention relates to the technical field of macroporous adsorption resin processing, in particular to a preparation process of a macroporous adsorption resin for precious metal and rare metal extraction. Background technique: [0002] At present, there are a certain content of precious metals and rare metals in chemical waste residues and waste liquids. If they are not recycled, it will cause serious waste of precious resources and increase subsequent production costs. [0003] The existing precious metals and rare metals mainly include two kinds, one is the extraction recovery method, and the other is the adsorption recovery method. The extraction recovery method uses organic solvents to extract and separate precious metals and rare metals, and the adsorption recovery method uses resins and other adsorbent substances to adsorb and separate precious metals and rare metals. The extraction recovery method has the problems that the amount of organic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26C22B11/00B01J20/30
CPCB01J20/267C22B11/00Y02P10/20
Inventor 薛兆能
Owner 安徽皖东树脂科技有限公司
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