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Preparation of multi-sulfonic functional ion liquid

A technology based on ionic liquids and polysulfonic acid groups, applied in chemical instruments and methods, organic chemistry, chemical/physical processes, etc., can solve the problems of small acid value and large amount of catalyst, and achieve low cost, good catalytic effect, and wide application The effect of applying the foreground

Inactive Publication Date: 2009-01-21
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this ionic liquid has the problems of small acid value and large amount of catalyst.

Method used

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  • Preparation of multi-sulfonic functional ion liquid
  • Preparation of multi-sulfonic functional ion liquid
  • Preparation of multi-sulfonic functional ion liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of Hexamethylenetetraminetetrasulfonic Acid-Based Ionic Liquid

[0022] Preparation of step 1 ylide

[0023] According to the raw material whose hexamethylenetetramine tertiary amine nitrogen atom is equal to that of 1,4-butane sultone, after stirring at room temperature for 72 hours, a white solid salt was obtained, and then sucked and filtered with concentration>99% The solid salt was washed three times with ether, and vacuum-dried at 60°C to obtain the ylide.

[0024] Step 2 Preparation of ionic liquid

[0025] Weigh the ylide and sulfuric acid equal to the amount of sulfonate in the ylide, heat and stir at 80°C for 4h to obtain the corresponding ionic liquid as follows:

[0026]

Embodiment 2-4

[0028] Except for the following differences, all the other are the same as in Example 1, and the acids in Table 1 are selected for use.

[0029] Table 1

[0030]

Embodiment 5-10

[0032] Except for the following differences, the rest are the same as in Example 1, and the polynitrogen tertiary amine compounds in Table 2 are selected.

[0033] Table 2

[0034]

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Abstract

The invention discloses a method for preparing a multi-sulfonic acid group functionalized ionic liquid. In the method, a poly-nitrogen tertiary amine reacts with a sultone to an obtain multi-sulfonic acid radical betaine, and the obtained betaine is subjected to acidification by an acid to obtain the multi-sulfonic acid group functionalized ionic liquid. The ionic liquid prepared by the invention has the characteristics of high thermal stability, high acid value, low synthesis cost and good catalytic effect, etc.

Description

technical field [0001] The invention relates to the technical field of organic chemical synthesis, in particular to a preparation method of polysulfonic acid group functionalized ionic liquid. Background technique [0002] In today's crisis of energy problems and environmental problems, it has become the goal of modern chemical industry to efficiently generate target products with a small amount of energy without producing unnecessary by-products. Acid catalysts are indispensable in the modern chemical industry and are widely used in the manufacture of various products such as pharmaceuticals, petrochemical products, and polymer products. However, most of the currently used liquid acid catalysts are hydrochloric acid and sulfuric acid. . The liquid catalyst used in the production process needs to be neutralized by alkali, and separated and recovered from the product by removing the salt generated by neutralization. However, a considerable amount of energy is consumed in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D487/22C07D487/08C07D233/61C07D213/22C07C309/14B01J31/02
Inventor 杨建国梁学正高珊鲍少华吴海虹何鸣元
Owner EAST CHINA NORMAL UNIV
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