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Magnetic iron oxide-immobilized ionic liquid solid acid material catalyst and preparation method thereof

A technology of magnetic iron oxide and ionic liquids, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve problems such as unrecoverable and difficult stratification, and achieve Ease of recovery, mild reaction, and simple operation

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

[0005] However, the recovery of ionic liquids during use, especially after reacting with polar alcohols and carboxylic acids, cannot be recovered because they will dissolve in organic matter and are difficult to separate.

Method used

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  • Magnetic iron oxide-immobilized ionic liquid solid acid material catalyst and preparation method thereof
  • Magnetic iron oxide-immobilized ionic liquid solid acid material catalyst and preparation method thereof
  • Magnetic iron oxide-immobilized ionic liquid solid acid material catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of Magnetic Iron Oxide Immobilized Vinylimidazolium Sulfate Ionic Liquid Solid Acid Materials

[0032] Preparation of step 1 ylide

[0033] Weigh the raw materials of vinylimidazole and 1,4-butane sultone in equal quantities, and stir at room temperature for 72 hours to obtain a white solid salt, then filter it with suction, wash it with 99% ether three times, and store it at 60°C Vacuum drying is carried out to obtain the ylide;

[0034] Step 2 Acidification

[0035] The ylide is mixed with sulfuric acid, phosphoric acid, hydrochloric acid or p-toluenesulfonic acid, and the amount of the acid is equal to the amount of the ylide, and the ylide is rotated at 80°C for 4 hours to obtain a homogeneous ionic liquid monomer;

[0036] Step 3 Preparation of thiolated magnetic iron oxide core

[0037] Dissolve ferric chloride and ferrous chloride in distilled water at a molar ratio of 2:1. The amount of distilled water is 35 times the mass of ferric chloride. Afte...

Embodiment 2-6

[0041] Except for the following differences, all the other are the same as in Example 1, and the alkenyl compounds are respectively as shown in Table 1, and the following results are obtained.

[0042] The alkenyl compound used in table 1 embodiment 2-6 and the catalyst parameter that obtains

[0043]

Embodiment 7-9

[0045] Except following difference, all the other are with embodiment 1, and different acid results are shown in table 2.

[0046] The acid used in table 2 embodiment 7-9 and the catalyst parameter that obtains

[0047]

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Abstract

The invention provides a magnetic iron oxide-immobilized ionic liquid solid acid material catalyst and a preparation method thereof. The preparation method comprises the steps: carrying out a reaction of an olefinic bond-containing imidazole, pyridine and tertiary amine compound with propane sultone or butane sultone, to obtain olefinic bond-containing ylide; then acidifying with an acid, to obtain sulfonyl functionalized ionic liquid monomers with anions as acid radicals; followed by, synthesizing magnetic iron oxide through coprecipitation, adding mercaptoalkyl trialkoxysilane, carrying out hydrolytic condensation, and thus forming a magnetic iron oxide core having the surface with sulfydryl; and finally, carrying out mixed copolymerization of the ionic liquid monomers with the magnetic iron oxide core having the surface sulfydryl, and thus forming the magnetic iron oxide-immobilized ionic liquid solid acid material catalyst. The catalyst material has the advantages of high thermal stability, stability to water, easy contact with acidic centers, high acid value, good catalytic effect, and simple and convenient recycling, and can be recycled by magnetic absorption.

Description

technical field [0001] The invention relates to the technical field of organic chemical synthesis, in particular to a magnetic iron oxide immobilized ionic liquid 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 a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01J35/02C07D317/72C07C39/08C07C37/16C07C43/20C07C41/09
Inventor 梁学正
Owner SHAOXING UNIVERSITY
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