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Preparation of sulfuric acid ester ion liquid

A technology of ionic liquid and sulfuric acid ester, which is applied in the preparation of amino-substituting functional groups, organic chemistry, etc., can solve the problems of no industrialization advantage and high synthesis cost, and achieve the effects of low vapor pressure, low product cost and mild reaction

Inactive Publication Date: 2008-12-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diversification of ionic liquids provides chemists with a variety of options for research, but at the same time, how to choose the most suitable ionic liquid from a large number of ionic liquids has become a difficult problem
In addition, a common problem with functionalized ionic liquids is that their synthesis costs are high and there is no industrialization advantage

Method used

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  • Preparation of sulfuric acid ester ion liquid
  • Preparation of sulfuric acid ester ion liquid
  • Preparation of sulfuric acid ester ion liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1 mole of diethyl sulfate (154.2 g) was placed in a four-necked round-bottomed flask, and 1 mole of diethylamine (60.1 g) was slowly added dropwise to the four-necked round-bottomed flask at normal temperature. After the dropwise addition, continue to stir and react for 2-3 hours. After the reaction is completed, heat to 70°C and rotate under reduced pressure to evaporate the unreacted reactants. The product N222EtSO 4 The yield is 98%, and the content is 99%. .

Embodiment 2-10

[0022] The results of the different raw material reaction products with reference to the method of Example 1 are shown in Table 1

[0023] Sulfate

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Abstract

The invention relates to a method for preparing a sulphuric acid ester ion liquid. The method takes simple amine and sulfuric acid ester as raw materials which are subjected to alkylation in order to synthesize the sulphuric acid ester ion liquid with high selectivity and high yield. The method has the advantages that the raw materials are cheap and available easily, the product has low cost, the synthesizing process is simple, the atom economy is high, the environment protection requirement is met and three wastes are not discharged basically, etc. The sulphuric acid ester ion liquid has the characteristics of the general ion liquid of low steam pressure, good thermal stability, uneasy volatilization, etc. and has industrial application prospect.

Description

technical field [0001] The invention relates to a preparation method of an ionic liquid, in particular to a chemical synthesis method of a class of sulfate ester ionic liquid. Background technique [0002] Ionic liquid, also known as room temperature molten salt. It is composed of organic cations and inorganic or organic anions, and is a liquid salt at room temperature or near room temperature (<100°C). The biggest feature of ionic liquids is their "designability". Ionic liquids can be designed to a certain extent by selecting appropriate anions, cations and changing the substituents of cations. In addition, ionic liquids also have low melting point, good thermal stability, almost no vapor pressure, wide solubility and good electrochemical performance. As a new type of "green solvent", ionic liquids have been widely used in many fields and have rapidly developed into a research hotspot. At present, its application extends from chemical synthesis and electrochemistry t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/63C07C209/04
Inventor 王勇李浩然王从敏
Owner ZHEJIANG UNIV