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Acidic ionic liquid-coated polymeric core solid acid material catalyst and preparation method thereof

A technology of acidic ionic liquids and ionic liquids, applied in the preparation of organic compounds, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve the problem of active center embedding and achieve thermal stability High quality, easy catalytic reaction, high yield effect

Inactive Publication Date: 2015-04-08
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Introduce polymerizable double bonds into traditional imidazole ionic liquids to polymerize on the surface of polydivinylbenzene cores, and synthesize acidic ionic liquids to wrap polymer core solid acid materials, which solves the problems of active center embedding caused by traditional copolymerization processes.

Method used

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  • Acidic ionic liquid-coated polymeric core solid acid material catalyst and preparation method thereof
  • Acidic ionic liquid-coated polymeric core solid acid material catalyst and preparation method thereof
  • Acidic ionic liquid-coated polymeric core solid acid material catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of Polymer Core Solid Acid Materials Encapsulated by Ethylene Imidazolium Sulfate Ionic Liquid

[0029] Preparation of step 1 ylide

[0030] Weigh the raw material of vinylimidazole and 1,4-butane sultone, stir at room temperature for 72 hours to obtain a white solid salt, then filter it with suction, wash it with 99% diethyl ether for 3 times, and store it at 60°C Vacuum drying is carried out to obtain the ylide;

[0031] Step 2 Acidification

[0032] Dissolving 1 g of ylide in 5 g of ethanol-water mixed solvent, adding sulfuric acid equal in amount to that of the ylide, stirring and mixing at room temperature for 4 hours, to obtain an ionic liquid solution in which the corresponding anion is hydrogen sulfate;

[0033] Step 3 Preparation of polydivinylbenzene core

[0034] Mix divinylbenzene, acetonitrile and azobisisobutyronitrile at a molar ratio of 1:100:0.00001, heat and stir at 70°C for 24 hours, filter, wash with acetonitrile, wash with ethanol, an...

Embodiment 2-6

[0038] Except for the following differences, the others are the same as in Example 1, and the alkenyl compound is as shown in Table 1, respectively, to obtain the following acidic ionic liquid-coated polymer solid acid material catalyst.

[0039] The alkenyl compound used in table 1 embodiment 2-6 and the catalyst parameter that obtains

[0040]

Embodiment 7-8

[0042] Except following difference, all the other are with embodiment 1, and acid is shown in table 2 respectively, and the catalyst result that different acids obtain is as table 2.

[0043] The acid used in table 2 embodiment 7-8 and the catalyst parameter that obtains

[0044]

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Abstract

The invention provides an acidic ionic liquid-coated polymeric core solid acid material catalyst and a preparation method thereof. The catalyst adopts imidazole containing ethylenic bonds, pyridine or a tertiary amine compound to react with propane sultone or butane sultone to obtain a ylide containing the ethylenic bonds, acidification is performed to obtain an ionic liquid monomer, divinylbenzene is self-polymerized in acetonitrile to form a polymeric core containing surface double bonds, and the prepared ionic liquid monomer and the polydivinylbenzene core are co-polymerized to form the acidic ionic liquid-coated polymeric core solid acid material catalyst. The catalyst material has the advantages of high thermal stability, easiness in contact with an active center, high acid value of above 3.0mmol / g, relatively large surface area and good catalytic effect, and can be used repeatedly.

Description

technical field [0001] The invention relates to the technical field of organic chemical synthesis, in particular to an acidic ionic liquid-wrapped polymer core solid acid material catalyst and a preparation method thereof. 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 amou...

Claims

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Application Information

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IPC IPC(8): B01J31/06C07C67/08C07C69/704C07C37/16C07C39/08C07C41/09C07C43/20
Inventor 何宁德梁学正
Owner SHAOXING UNIVERSITY
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