Preparation method of acid ionic liquid mesoporous polymeric material

A technology for acidic ionic liquids and polymeric materials, which is applied in the preparation of organic compounds, carboxylate esters, and dehydration of hydroxyl-containing compounds to prepare ethers. It can solve the problems of difficult separation and recovery, and achieve easy recovery and good catalytic effect. , High thermal stability and qualitative effect

Inactive Publication Date: 2013-11-06
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the recovery of ionic liquids during use, especially after reacting with polar alcohols and carboxylic acids, cannot be recovered because they will be dissolved in organic matter and difficult to separate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1. Preparation of vinylimidazolium sulfate ionic liquid mesoporous polymer material.

[0033] The preparation of the 1st step, ylide:

[0034] Weigh vinylimidazole and 1,4-butane sultone according to the amount of the same substance, and stir at room temperature for 72 hours to obtain a white solid salt, then filter it with suction, and wash it three times with 99% diethyl ether for 60 ℃ for vacuum drying to obtain the ylide;

[0035] Step 2, Acidification:

[0036] Dissolving 1 g of the prepared ylide in 5 g of ethanol, adding sulfuric acid having an amount equal 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;

[0037] Step 3, metal ion L acid center introduction:

[0038] In the above ionic liquid solution, add copper oxide with a molar ratio of 1:1 to the ylide (calculated by converting the copper valence to 1 valence), continue to stir until...

Embodiment 2-3

[0044] The preparation method is the same as that in Example 1, except that the alkenylimidazole shown in Table 1 is used to prepare the acidic ionic liquid mesoporous polymer material with the following properties.

[0045] Table 1. Performance comparison of acidic ionic liquid mesoporous polymer materials prepared by different alkenylimidazoles.

[0046] Example Alkenylimidazole Acid value / mmol / g Pyrolysis temperature / ℃ 2

Embodiment 4-6

[0048] The preparation method is the same as in Example 1, except that different metal oxides or hydroxides are used. The results are shown in Table 2.

[0049] Table 2. Performance comparison of acidic ionic liquid mesoporous polymer materials prepared from different metal oxides or hydroxides.

[0050] Example oxide / hydroxide Acid value / mmol / g Pyrolysis temperature / ℃ 4 Fe(OH) 3 4.7 227 5 Sn(OH) 4 4.2 224 6 Mg(OH) 2 4.5 219

[0051] 2. Application examples.

[0052] The acidic ionic liquid mesoporous polymer material prepared in Example 1 was used to catalyze esterification reaction, condensation reaction, alkylation reaction and etherification reaction respectively, and the following examples were obtained.

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Abstract

The invention discloses a preparation method of an acid ionic liquid mesoporous polymeric material, belonging to the technical field of organic chemical synthesis. The method is characterized by comprising the following steps of: enabling an imidazole compound containing ethylenic bond to react with sultone to obtain ylid of sulfonic group containing ethylenic bond; acidifying with inorganic acid to obtain a sulfonic group functionalization ionic liquid monomer of which the anion is acid radical; reacting with a metal oxide or hydroxide to convert some hydrogen ions into metal ions of the L acid center; preparing an ionic liquid monomer with both B acid center and L acid center; performing self-polymerization of the ionic liquid monomer to form an ionic liquid low polymer; and then performing co-polymerization with divinyl benzene to form the acid ionic liquid mesoporous polymeric material. The synthesized material in the invention has the advantages of high thermal stability and good catalytic effect and can be repeatedly used.

Description

Technical field: [0001] The invention relates to a preparation method of an acidic ionic liquid mesoporous polymer material, in particular to a preparation method of an ionic liquid mesoporous polymer material having both B acid centers and L acid centers. 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 neutraliza...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/36C08F226/06B01J31/06C07C67/08C07C69/704C07D317/72C07C37/16C07C39/08C07C41/09C07C43/20
Inventor 梁学正
Owner SHAOXING UNIVERSITY
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