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3-peroxybenzoic acid-1-methylimidazolium chlorine salt as well as preparation and application thereof

A technology of methylimidazolium chloride salt and peroxybenzoic acid, which is applied in the field of ionic liquids, can solve the problems of precious metal dissolution and recovery, and achieve the effects of low overall energy consumption, mild conditions, and cost reduction

Active Publication Date: 2021-08-24
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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  • 3-peroxybenzoic acid-1-methylimidazolium chlorine salt as well as preparation and application thereof
  • 3-peroxybenzoic acid-1-methylimidazolium chlorine salt as well as preparation and application thereof
  • 3-peroxybenzoic acid-1-methylimidazolium chlorine salt as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The three-port glass instrument used in the experiment was dewatered with a high-temperature spray gun, vacuumed with a double-row pipe, and solid drugs were added under the protection of nitrogen to ensure anhydrous conditions.

[0053] 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 1-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, and filtered to obtain 3-benzoic acid-1-methylimidazoliu...

Embodiment 2

[0057] Take 1.5g of 3-peroxybenzoic acid-1-methylimidazolium chloride salt, add 5mL of water to dissolve it, and obtain 6mL of solution, add 0.0025g of palladium powder, and heat to 60°C. After 1 hour, the palladium powder dissolves almost completely. The Pd concentration measured by the atomic absorption spectrometer was 2.514ug / mL, and the calculated dissolution rate was 91.42%.

Embodiment 3

[0059] Take 1.5g of 3-peroxybenzoic acid-1-methylimidazolium chloride salt, add 5mL of water to dissolve it, and obtain 6mL of solution, add 0.003g of palladium powder, heat to 60°C for 1 hour and 15min, the palladium powder dissolves almost completely, The concentration of Pd measured by atomic absorption spectrometer was 2.949ug / mL, and the calculated dissolution rate was 89.35%.

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Abstract

The invention discloses 3-peroxybenzoic acid-1-methylimidazolium chlorine salt as well as preparation and application thereof. The 3-peroxybenzoic acid-1-methylimidazolium chloride is an ionic liquid, and the structure of the 3-peroxybenzoic acid-1-methylimidazolium chloride is shown in the specification. The invention provides the application of the 3-peroxybenzoic acid-1-methylimidazolium chloride as a metal leaching agent, the defect that a toxic precious metal leaching agent is used in the traditional metallurgical industry is overcome, and the 3-peroxybenzoic acid-1-methylimidazolium chloride has the advantages of being efficient, green, environmentally friendly and sustainable.

Description

[0001] (1) Technical field [0002] The invention relates to a novel ionic liquid—3-peroxybenzoic acid-1-methylimidazolium chloride salt and its preparation and application. [0003] (2) Background technology [0004] 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. [0005] 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 precious metals"...

Claims

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Application Information

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IPC IPC(8): C07D233/60C22B3/16C22B7/00C22B11/00
CPCC07D233/60C22B3/1666C22B7/006C22B11/04C22B11/042Y02P10/20
Inventor 丰枫赵明星丁和达王海欣杨赛武张群峰卢春山郭伶伶李小年
Owner ZHEJIANG UNIV OF TECH
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