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1-Methyl-3-(4-diacetoxyiodobenzyl) imidazolium chloride salt and its preparation and application

A technology of diacetoxy iodine and iodobenzyl chloride, applied in the direction of organic chemistry, process efficiency improvement, etc., can solve the problem that there are not many studies on the extraction of elemental precious metals, and achieve mild conditions, cost reduction, and overall energy efficiency. The effect of low consumption

Active Publication Date: 2021-05-11
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Ionic liquids have been deeply studied and widely used in the extraction of metal ions, but there is not much research on the extraction of elemental precious metals by ionic liquids.

Method used

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  • 1-Methyl-3-(4-diacetoxyiodobenzyl) imidazolium chloride salt and its preparation and application
  • 1-Methyl-3-(4-diacetoxyiodobenzyl) imidazolium chloride salt and its preparation and application
  • 1-Methyl-3-(4-diacetoxyiodobenzyl) imidazolium chloride salt and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Add 8 ml of thionyl chloride to 5 g of 4-iodobenzyl alcohol, heat to reflux for 4 hours, and then distill off the thionyl chloride under reduced pressure to obtain 5.2 g of the product 4-iodobenzyl chloride.

[0053] Mix 5.2g of 4-iodobenzyl chloride with 1.8g of 1-methylimidazole, the solvent is 30mL of acetonitrile, heat to reflux for 16h, add 60mL of ether to the solution, scrape and let it settle, and filter to obtain 6.5g of 1-methyl-3- (4-iodobenzyl)imidazolium chloride salt.

[0054] 12ml of acetic anhydride was added in 21ml of hydrogen peroxide (30%) at one time, heated slowly, and reacted at 40° C. for 4 hours to obtain a solution containing peroxyacetic acid.

[0055] 6.5g of 1-methyl-3-(4-iodobenzyl)imidazolium chloride salt was added to the solution containing peracetic acid for oxidation, and after heating to reflux for 16h, the solvent was removed by rotary evaporation to obtain 1-methyl-3-(4- Diacetoxyiodobenzyl)imidazolium chloride ([dibmim]Cl). figur...

Embodiment 2

[0057] Take 3ml of [dibmim]Cl, add 0.001g of gold powder and stir, slightly heat to 60°C, the gold powder is completely dissolved in 6 minutes, and the Au concentration of the solution is measured by atomic absorption spectrometer to be 333.3ug / ml, and the calculated gold dissolution rate is 100%.

Embodiment 3

[0059] Take 3ml of [dibmim]Cl, add 0.002g of gold powder and stir, heat slightly to 60°C, and the gold powder is completely dissolved in 6 minutes. The Au concentration of the solution is measured by atomic absorption spectrometer to be 666.66ug / ml, and the calculated gold dissolution rate is 100%.

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Abstract

The invention discloses an ionic liquid-1-methyl-3-(4-diacetoxyiodobenzyl) imidazolium chloride salt and its preparation and application. The structure of the 1-methyl-3-(4-diacetoxy iodobenzyl) imidazolium chloride salt is as follows: the present invention provides 1-methyl-3-(4-diacetoxy iodobenzene Methyl) imidazolium chloride salt as the application of gold leaching agent, described application comprises: the sample that contains noble metal is added in 1-methyl-3-(4-diacetoxy iodobenzyl) imidazole chloride salt, fully stirred Leach precious metals. The 1-methyl-3-(4-diacetoxyiodobenzyl) imidazolium chloride salt provided by the present invention has both good oxidation and metal coordination capabilities, and its application as a gold leaching agent breaks through the traditional metallurgical industry. The shortcomings of toxic gold leaching agents have the advantages of high efficiency, environmental protection and sustainability.

Description

[0001] (1) Technical field [0002] The invention relates to an ionic liquid-1-methyl-3-(4-diacetoxy iodobenzyl) imidazolium chloride salt, a preparation method thereof and an application as a gold leaching agent. [0003] (2) Background technology [0004] In addition to their high value, precious metals are widely used in electronic appliances, communications, computers, aerospace, petrochemical and other modern technology and industrial fields because of their unique physical and chemical properties, such as loaded metals or directly as catalysts It can be used to catalyze various reactions and can also be used in food safety testing. It can be said that precious metals are indispensable strategic resources in modern industry and economy. [0005] In nature, precious metals are ubiquitous in ores, and smelting methods can be roughly divided into two categories: physical metallurgy and chemical metallurgy, but physical metallurgy is only suitable for high-grade ores, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D233/60C22B3/16C22B11/00
CPCC07D233/60C22B3/1666C22B11/04Y02P10/20
Inventor 丰枫芮佳瑶李小年孙嫣霞赵佳刘佳媚郭伶伶张群峰许孝良卢春山
Owner ZHEJIANG UNIV OF TECH
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