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Selective ionic liquid, synthesis method, and application thereof

An ionic liquid and selective technology, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve the problems of rodent learning ability and exercise ability, liver toxicity, reproductive toxicity, etc., and meet the requirements of the reaction conditions. High, easy to operate, simple installation effect

Inactive Publication Date: 2012-07-04
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another experiment has proved that polybrominated diphenyl ethers (PBDEs) can affect the learning ability and exercise ability of mice, cause liver toxicity, endocrine disorders and even reproductive toxicity

Method used

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  • Selective ionic liquid, synthesis method, and application thereof
  • Selective ionic liquid, synthesis method, and application thereof
  • Selective ionic liquid, synthesis method, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1-Acetoxymethyl-3-methylimidazolium bromide ([CH 2 Synthesis of COOMeMIM]Br)

[0027]

[0028] in N 2 Under protection, using acetonitrile as a solvent, add 18.5mL (0.2mol) of methyl bromoacetate to the reaction vessel, slowly add 15.9mL (0.2mol) of N-methylimidazole dropwise into the reaction vessel, and make it react with methyl bromoacetate The ester molar ratio is 1:1~1:1.5. First, stir continuously at room temperature to fully mix the two, and then heat to reflux for 12 hours to obtain the crude bromo-1-acetate-3-methylimidazolium ionic liquid , separated with a separatory funnel while hot, washed the crude product several times with ethyl acetate, distilled off the solvent and ethyl acetate under reduced pressure, and dried in vacuo to obtain a white solid that is the purified ionic liquid intermediate product 1-acetate-3 - Methylimidazolium bromide. The obtained product was confirmed to be the compound described in the title by infrared spectrum and nuclear...

Embodiment 2

[0030] 1-Acetoxymethyl-3-methylimidazolium hexafluorophosphate ([CH 2 COOMeMIM]PF 6 )Synthesis

[0031]

[0032] Dissolve potassium hexafluorophosphate and purified 1-acetoxymethyl-3-methylimidazolium bromide salt with appropriate amount of distilled water respectively, mix the two to control the molar ratio of 1:1~1:1.2, and stir at room temperature for 12 hours , filtered and washed the product several times, and dried in vacuum to obtain the final product of the ionic liquid, 1-acetate-3-methylimidazolium hexafluorophosphate. The obtained product was confirmed to be the compound described in the title by infrared spectrum and nuclear magnetic resonance spectrum analysis, and the data content is shown in title five.

Embodiment 3

[0034] 1-methylbenzoate-3-methylimidazolium bromide ([CH 2 C6H 4 Synthesis of (p-COOMe)MIM]Br)

[0035]

[0036] in N 2 Under protection, using acetonitrile as a solvent, add 13.75g (0.06mol) of methyl p-bromomethylbenzoate to the reaction vessel, slowly add 4mL (0.05mol) of N-methylimidazole dropwise into the reaction vessel, keep stirring and heating After reflux reaction for 12 hours, the system was divided into upper and lower layers after the reaction was completed, and separated with a separatory funnel to obtain the crude product of 1-p-methylbenzoic acid methyl-3-methylimidazolium bromide salt ionic liquid in the lower layer, which was washed with ethyl acetate for several The solvent and ethyl acetate were removed by extraction and separation under reduced pressure, and the white solid was obtained by vacuum drying, that is, the purified ionic liquid intermediate product 1-p-methylbenzoate-3-methylimidazolium bromide. The obtained product was confirmed to be the c...

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Abstract

The invention relates to selective ionic liquid, and a synthesis method and application thereof, belonging to the technical field of ionic liquid. The ionic liquid is 1-methyl acetate-3-methylimidazole bromine salt, 1-methyl acetate-3-methylimidazole hexafluorophosphate, 1-methyl p-methyl benzoate-3-methylimidazole bromine salt, 1-methyl p-methyl benzoate-3-methylimidazole hexafluorophosphate. N-methylimidazole and corresponding halohydrocarbon derivative are used as raw materials to synthesize 1,3-two-position substituted imidazole brominated ionic liquid, and furthermore, anion exchange is conducted to obtain the imidazole hexafluorophosphate ionic liquid. The purposes are extraction enrichment of trace pollutant SVOC (semi-volatile organic compound) in the indoor air and subsequent instrument combined measurement. The preparation method of the ionic liquid provided by the invention has the advantages of being simple in devices, easy in operation, low in requirement of reaction conditions, and the like.

Description

technical field [0001] The invention relates to a selective ionic liquid, a synthesis method and an application thereof, in particular to a preparation method and an application of a novel imidazole-based ionic liquid used for selectively absorbing SVOC pollutants in indoor air, and belongs to the technical field of ionic liquids. technical background [0002] Semi-volatile organic pollutants (SVOCs) refer to organic compounds with a boiling point in the range of 240-400 °C. Although the saturated vapor pressure is low, they have strong adsorption properties and can form certain particles between the gas phase and the solid phase particles in the air. It is more stable and difficult to degrade than volatile organic compounds (VOCs), and can last for years in the environment. Indoor persistent SVOCs are comparable to persistent organic pollutants (POPs) in the atmosphere. SVOCs mainly include flame retardants polychlorinated biphenyls, polybrominated biphenyls, polybrominate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/56B01D53/14
Inventor 陈慧敏王小逸客慧明
Owner BEIJING UNIV OF TECH
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