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Ionic liquid combining B acid site and L acid site as well as preparation method and application thereof

A technology of ionic liquid and B acid, which is applied in the preparation of sulfonates, carboxylates, chemical instruments and methods, etc., can solve the problem of single types of acids, and achieve high thermal stability, high catalytic activity, and good catalytic effect Effect

Inactive Publication Date: 2011-05-18
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this ionic liquid has problems such as a single type of acid

Method used

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  • Ionic liquid combining B acid site and L acid site as well as preparation method and application thereof
  • Ionic liquid combining B acid site and L acid site as well as preparation method and application thereof
  • Ionic liquid combining B acid site and L acid site as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1, Preparation of Sulfonic Acid Functionalized Triethylamine Chloroaluminate Ionic Liquid

[0028] (1) Preparation of ylide: weigh triethylamine and 1,4-butane sultone equal raw materials, stir at room temperature for 72h to obtain a white solid salt, then suction filter, with a concentration of After washing with 99% diethyl ether for three times, vacuum-dry at 60°C to obtain the ylide.

[0029] (2) Sulfuric acid acidification: Weigh the stoichiometric ylide and sulfuric acid, the amount of sulfuric acid is equal to the amount of sulfonate in the ylide, heat and stir at 80°C for 4h, and the corresponding anion is bisulfate ion of ionic liquids.

[0030] (3) Synthesis of ionic liquid: take the above-mentioned ionic liquid and copper oxide (25% of copper), heat and stir under vacuum at 80°C for 12h, and obtain the following ions with both B acid centers and L acid centers liquid:

[0031]

Embodiment 2-4

[0033] The preparation method is the same as in Example 1, except that the tertiary amine shown in Table 1 is used to obtain the following ionic liquid.

[0034] Table 1. Ionic liquids prepared by different tertiary amines

[0035]

Embodiment 5-7

[0037] The preparation method is the same as in Example 1, except that different metal oxides or hydroxides are used, and the results are shown in Table 2.

[0038] Table 2, different metal oxides or hydroxides and prepared ionic liquids

[0039]

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Abstract

The invention discloses an ionic liquid combining a B acid site and an L acid site as well as a preparation method and application thereof, belonging to the technical field of organic chemistry synthesis. The preparation method is characterized by comprising the following steps of: reacting a tertiary amine compound with sultone to obtain the ylid salt of mucopolysaccharide radical; acidizing with sulfuric acid to obtain a sulfonic functionalized ion liquid of which the anion is bisulfate radical; reacting with metal oxide or hydroxide; and converting parts of hydrogen ion into the metal ion of the L acid site to prepare the ionic liquid combining the B acid site and the L acid site. The ionic liquid has the advantages of high thermal stability, varied acid types, good catalytic effect, combination of the B acid site and the L acid site, stability to water and no decomposition and the like, and a catalyst can be reused several times.

Description

Technical field: [0001] The invention relates to the technical field of organic chemical synthesis, in particular to an ionic liquid with both B-acid centers and L-acid centers and its preparation method and application. 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 amoun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/14C07D213/04C07D233/60C07D215/10C07C303/32C07D317/72C07C39/08C07C37/16C07C43/20C07C41/09C07C67/08C07C69/704B01J31/02
Inventor 梁学正
Owner SHAOXING UNIVERSITY
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