Novel ionic liquid composite medium and preparation method, application and application method thereof

An ionic liquid and composite medium technology, applied in the electrolysis process, electrolysis components, electrolysis organic production and other directions, can solve the problems of complex operation, lack of efficient homogeneous catalysts, reduce costs, etc., to achieve simple reaction process and operation, efficient homogeneous phase Catalytic conversion, the effect of reducing production costs

Active Publication Date: 2019-08-16
ANYANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, most of the work focused on the conversion of biomass to 5-hydroxymethylfurfural in ionic liquids, while the research on the preparation of 2,5-dimethylfuran was relatively limited
Secondly, most of the reaction raw materials are low-molecular sugars such as glucose and fructose with high prices, and there is a lack of efficient homogeneous catalysts suitable for natural macromolecular biomass such as cellulose, which is not conducive to reducing costs
In addition, the reaction process often requires a certain amount of platinum-carbon, palladium-carbon and other precious metal composite materials as catalysts, which is costly and complicated to operate.

Method used

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  • Novel ionic liquid composite medium and preparation method, application and application method thereof
  • Novel ionic liquid composite medium and preparation method, application and application method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A kind of ionic liquid composite medium and preparation method thereof, its steps are as follows

[0035] 1) First, mix thiopropionamide with AlCl at room temperature and nitrogen atmosphere 3 Mix and react for 2 hours with a substance ratio of 1:2.5 to obtain an ionic liquid solvent;

[0036] 2) Then, the 1-methyl-2-sulfopropylpyrazole chloride salt and AlCl 3 Mix and react at room temperature for 3 hours at a material ratio of 1:3 to obtain an ionic liquid catalyst;

[0037] 3) Finally, mix the solvent and the catalyst at room temperature to obtain a novel ionic liquid composite medium, wherein the molar percentage of the catalyst in the composite medium system is 15%.

[0038] The method for preparing 2,5-dimethylfuran by using the ionic liquid composite medium, the steps are as follows:

[0039] A. Under a nitrogen atmosphere, first add 2 g of cellulose pulp (polymerization degree range of 500 to 1000) into 20 g of ionic liquid composite medium, and stir and reac...

Embodiment 2

[0043] An ionic liquid composite medium and a preparation method thereof, the steps of which are as follows:

[0044] 1) First, thioisobutyramide was mixed with AlBr at room temperature under an argon atmosphere 3 Mixing and reacting for 1.5h with a substance ratio of 1:2 to obtain an ionic liquid solvent;

[0045] 2) Then, 1-hydrogen-2-hydroxy-4-methylpyrimidinium bromide and AlBr 3 Mix and react at room temperature for 2 hours at a material ratio of 1:2.1 to obtain an ionic liquid catalyst;

[0046] 3) Finally, a novel ionic liquid composite medium is obtained by mixing the solvent and the catalyst at room temperature, wherein the molar percentage of the catalyst in the medium system is 20%.

[0047] The method for preparing 2,5-dimethylfuran by using the ionic liquid composite medium, the steps are as follows:

[0048] A. Under an argon atmosphere, first add 2.5 g of microcrystalline cellulose (with a degree of polymerization ranging from 200 to 500) into 20 g of an ionic ...

Embodiment 3

[0052] An ionic liquid composite medium and a preparation method thereof, the steps of which are as follows:

[0053] 1) First, thiobenzamide was mixed with AlBr at room temperature and nitrogen atmosphere 3 Mix and react for 2 hours with a substance ratio of 1:2.5 to obtain an ionic liquid solvent;

[0054] 2) Then, 1-hydrogen-2-carboxy-5-methylpyrazine chloride salt and AlCl 3 Mixing and reacting for 3.5 hours with a substance molar ratio of 1:3.5 to obtain an ionic liquid catalyst;

[0055] 3) Finally, a new type of ionic liquid composite medium is obtained by mixing the above solvent and catalyst, wherein the mole percentage of the catalyst in the medium system is 18%.

[0056] Utilize described ionic liquid composite medium to prepare the method for 2,5-dimethylfuran, its steps are as follows:

[0057] A. Under a nitrogen atmosphere, first add 1.2 g of cotton linters (the degree of polymerization ranges from 1000 to 2000) into 20 g of ionic liquid composite medium, and...

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Abstract

The invention provides a novel ionic liquid composite medium which is prepared by mixing an ionic liquid solvent and an ionic liquid catalyst. The ionic liquid type solvent is obtained by mixing and reacting thioamide and excessive aluminum halide at room temperature and inert atmosphere, and the ionic liquid type catalyst is obtained by mixing and reacting organic onium halide containing Br-NSTEDacidic functional groups and excessive aluminum halide at room temperature and inert atmosphere. At the same time, the invention also provides a preparation method, application and application methodthereof. In the invention, ionic liquid is used as a novel green medium, and efficient homogeneous catalytic conversion of cellulose to 2,5-dimethylfuran is realized through an electrochemical method, which is beneficial to reducing production cost. In addition, the solution system is nonflammable and difficult to volatilize, the reaction process is simple to operate and has good safety, and thetechnology has broad application prospects.

Description

technical field [0001] The invention belongs to the field of biomass energy, and specifically relates to a novel ionic liquid composite medium and its preparation method and application and application method. Background technique [0002] The development of contemporary society and economy has an increasing demand for energy, and fossil fuels represented by coal, oil and natural gas are still the most important energy sources. However, these resources are not only difficult to regenerate, but also a large amount of consumption has brought about serious environmental problems. Therefore, the development of new green renewable energy is an important way to solve this problem. [0003] 2,5-Dimethylfuran is a new type of fuel oil, which can be prepared by converting biomass such as cellulose, which exists widely in nature. The substance has the advantages of high energy density, high boiling point, low volatility, and good environmental protection, and is an ideal fuel to rep...

Claims

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Application Information

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IPC IPC(8): C25B3/04C25B3/25
CPCC25B3/25
Inventor 郑勇郑永军武卫明罗家还来常伟邱明艳
Owner ANYANG INST OF TECH
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