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1-(4-carboxylperoxybenzyl)-3-methylimidazole aluminum tetrachloride salt or ferric salt, preparation and application thereof

A technology of methyl imidazole ferric tetrachloride and methyl imidazole aluminum tetrachloride, applied in the field of new ionic liquids, can solve the problems of dissolving and recycling of precious metals and the like, and achieve the effects of good leaching capacity, cost reduction and mild conditions

Pending Publication Date: 2021-12-17
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, although ionic liquids are an ideal class of environment-friendly solvents, the use of ionic liquids to study the dissolution and recovery of precious metals seems to be somewhat "diametrically opposed".

Method used

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  • 1-(4-carboxylperoxybenzyl)-3-methylimidazole aluminum tetrachloride salt or ferric salt, preparation and application thereof
  • 1-(4-carboxylperoxybenzyl)-3-methylimidazole aluminum tetrachloride salt or ferric salt, preparation and application thereof
  • 1-(4-carboxylperoxybenzyl)-3-methylimidazole aluminum tetrachloride salt or ferric salt, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) The three-port glass instrument used in the experiment was dewatered with a high-temperature spray gun, evacuated with a double-row pipe, and solid drugs were added under the protection of nitrogen to ensure anhydrous and oxygen-free conditions.

[0050] The 8.53g p-chloromethylbenzoic acid that will take is joined in the there-necked flask of 100mL that magnetron is arranged, adorn condenser tube, three-way pipe, the balloon that will be charged with nitrogen is connected with three-way pipe (gas protection), use The rubber screw plug is sealed, and the air should be ventilated at least 3 times, then inject 50mL of redistilled tetrahydrofuran into the flask, and then slowly inject 4.11g of N-methylimidazole into the solution, continue to stir and heat to 70°C, and stir for 8h , after the reaction was completed, the reaction solution was cooled to room temperature, ether was added to the reaction solution, scraped and left to settle, filtered to obtain 1-(4-carboxybe...

Embodiment 2

[0055] Steps (1)-(2) are the same as in Example 1.

[0056] (3) 0.5337 g of the obtained 1-(4-carboxyperoxybenzyl)-3-methylimidazolium chloride salt was dissolved in 3 mL of deionized water under nitrogen protection, 0.62 g of anhydrous ferric chloride was added, and heated Reflux and stir for 6h, the whole system maintains a nitrogen atmosphere, then remove the solvent on a rotary evaporator, put the resulting product in a vacuum oven and dry it under nitrogen protection overnight to obtain 1-(4-carboxyperoxybenzyl)-3-methyl imidazole ferric chloride salt.

Embodiment 3

[0058] Take 4g of 1-(4-carboxyperoxybenzyl)-3-methylimidazolium tetrachloride aluminum salt, add 0.0021g of palladium powder to obtain 3.1mL solution, heat slightly to 60°C for 15min, the palladium powder dissolves almost completely, The sample was diluted 500 times, and the concentration of Pd measured by atomic absorption spectrometer was 1.353ug / mL, and the calculated dissolution rate was 99.88%.

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Abstract

The invention relates to a novel ionic liquid-1-(4-carboxyperoxybenzyl)-3-methylimidazole aluminum tetrachloride salt or iron salt, preparation and application thereof. The ionic liquid has good oxidation and metal coordination capabilities. According to the invention, the application of the ionic liquid as a metal leaching agent is provided, the defect that a toxic precious metal leaching agent is used in the traditional metallurgical industry is overcome, and the ionic liquid has the advantages of being efficient, green, environmentally friendly and sustainable.

Description

(1) Technical field [0001] The invention relates to a novel ionic liquid-1-(4-carboxyperoxybenzyl)-3-methylimidazolium tetrachloride aluminum salt or iron salt and its preparation and application. (2) Background technology [0002] Precious metals have stable properties and good electrical conductivity, and are widely used in jewelry, currency, electronic information, aerospace, and chemical industries. They are indispensable and important resources in the development of modern industry and technology. [0003] The content of precious metals in the earth's crust is very small, and they are very dispersed. The grade of the ore is low and the composition is complex. Therefore, the extraction process is long, the cost is high, and the price is expensive. Precious metals are rare and expensive, and various scraps containing precious metals have a higher recovery value than ordinary metals, so people pay more and more attention to them, and they are called "secondary resources of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/56C22B11/00C22B15/00C22B3/04C22B7/00
CPCC07D233/56C22B11/04C22B15/0065C22B3/04C22B7/006Y02P10/20
Inventor 丰枫赵明星王海欣丁和达赵佳张群峰许孝良卢春山李小年
Owner ZHEJIANG UNIV OF TECH
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