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Alkylimidazole ethylenediaminetetraacetic acid iron (III) water-soluble ionic liquid and synthetic method thereof

A technology of alkylimidazole ethylenediaminetetraacetic acid iron and ionic liquid, which is applied in the field of preparation of iron-based ionic liquid, can solve the problems such as inability to synthesize, and achieve the effects of low surface tension, high iron concentration, and simple synthesis method

Inactive Publication Date: 2014-02-05
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A.Branco et al synthesized [Emim][Fe(EDTA)], but the method can only synthesize [Emim] + Cationic iron-based ionic liquids, but cannot be synthesized containing [Bmim] + and other organic cations in iron-based ionic liquids

Method used

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  • Alkylimidazole ethylenediaminetetraacetic acid iron (III) water-soluble ionic liquid and synthetic method thereof
  • Alkylimidazole ethylenediaminetetraacetic acid iron (III) water-soluble ionic liquid and synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 29.5ml ethanol, 5.873g KOH and 20g [Emim]Br (1-ethyl-3-methylimidazolium bromide) into a 100ml Erlenmeyer flask, stir vigorously at room temperature for 2 hours, filter off solid KBr under reduced pressure, and the filtrate After rotary evaporation of the ethanol solvent at 50° C., a yellow viscous liquid was obtained, namely [Emim]OH (1-ethyl-3-methylimidazole hydroxide) crude product.

Embodiment 2

[0039] 80ml ethanol, 16.061g KOH and 50g [Bmim]Cl (1-butyl-3-methylimidazolium chloride salt) were added in a 250ml Erlenmeyer flask, vigorously stirred at room temperature for 2 hours, and the solid KCl was filtered off under reduced pressure, and the filtrate was placed in After rotary evaporation of the ethanol solvent at 50°C, a red viscous liquid was obtained, which was the crude product of [Bmim]OH (1-butyl-3-methylimidazole hydroxide).

example 2

[0040] Infrared characterization results of [Bmim]OH prepared in Example 2: 3091,2961,2915,2874,2667,1668,1601, 1464,1379,1172,756,625cm -1 .

[0041] Example 2 The prepared [Bmim]OH aqueous solution UV characterization results: characteristic spectrum 195nm.

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Abstract

The invention discloses an alkylimidazole ethylenediaminetetraacetic acid iron (III) water-soluble ionic liquid and a synthetic method thereof. The technical scheme is characterized in that: an alkylimidazole chlorine salt or bromine salt, KOH, ferric chloride hexahydrate and ethylenediaminetetraacetic acid are taken as raw materials for synthesis of alkylimidazole ethylenediaminetetraacetic acid iron (III). Compared with conventional halogen-containing iron-based magnetic ionic liquid, alkylimidazole ethylenediaminetetraacetic acid iron (III) has the characteristics of adjustable acid-base property, high water solubility and the like. The water solution of alkylimidazole ethylenediaminetetraacetic acid iron (III) not only has relatively high oxidation-reduction reversibility, but also has lower surface tension and higher iron (III) concentration compared with a water solution of Fe-EDTA.

Description

technical field [0001] The invention relates to a preparation method of a halogen-free iron-based ionic liquid, in particular to a synthesis of an iron-based ionic liquid with good water solubility and adjustable pH. The synthesized ionic liquids exhibit good water solubility, magnetism, redox reversibility, and low surface tension. Background technique [0002] Room temperature ionic liquids are composed of organic cations and inorganic / organic anions, and are liquid salts at or near room temperature. Iron-based ionic liquids are composed of organic cations and iron-containing inorganic or organic anions. Ionic liquids containing ferric tetrachloride(bromide) anions are the most widely studied metal-based magnetic ionic liquids. [0003] Ionic liquids containing ferric tetrachloro(bromide) anions have many unique properties, such as magnetism, low vapor pressure, high thermal stability, high hydrophobicity, low viscosity (J. Mater. Chem., 2006, 16, 1254) and Low surface ...

Claims

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Application Information

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IPC IPC(8): C07D233/58C07C229/76C07C227/18
CPCC07D233/58
Inventor 王建宏
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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