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Method for extracting levulinic acid from biomass hydrolysate glucose

A technology for hydrolyzed products and levulinic acid, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylate, etc., can solve the problems of difficult control of the reaction process, large amount of reagents used, and long reaction process, etc. The effect of fast speed, saving energy consumption and simple operation

Inactive Publication Date: 2014-05-21
NANKAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ionic liquids can build an efficient, recyclable and environmentally friendly reaction system. This homogeneous reaction system overcomes many shortcomings of the heterogeneous reaction system, such as: long reaction process, large amount of reagents used, difficult to control the reaction process, and uneven products. Wait

Method used

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Embodiment 1

[0019] A method for extracting levulinic acid from biomass hydrolyzate glucose, using ionic liquid as reaction system, using solid acid catalyst ZrP 2 Carry out heating reaction as catalyst, step is as follows:

[0020] 1) Mix 1.74g 1-butyl-3-methylimidazolium chloride salt ionic liquid, 0.10g glucose and 2g distilled water, add 0.04g solid acid catalyst ZrP 2 , and then placed in a microwave heating reactor, with N 2 As a protective gas, the reaction was carried out at a pressure of 2 MPa and a temperature of 180 °C for a reaction time of 20 minutes to obtain a reaction liquid;

[0021] 2) After cooling the reaction liquid to room temperature, filter it with a 0.45um membrane filter, extract the filtered clear liquid with ethyl acetate, the volume ratio of the clear liquid to ethyl acetate is 1:1, and repeat the extraction process 4 times , collect all the extracts;

[0022] 3) Levulinic acid can be obtained by rectifying the above extract.

[0023] The prepared levulinic...

Embodiment 2

[0026] A method for extracting levulinic acid from biomass hydrolyzate glucose, using ionic liquid as reaction system, using solid acid catalyst ZrP 2 Carry out heating reaction as catalyst, step is as follows:

[0027] 1) Mix 0.87g 1-butyl-3-methylimidazolium chloride ionic liquid, 1.02g 1-butyl-3-methylimidazolium bisulfate ionic liquid, 0.10g glucose and 2g distilled water, add 0.04g solid acid Catalyst ZrP 2 , and then placed in a microwave heating reactor, with N 2 As a protective gas, the reaction was carried out at a pressure of 2 MPa and a temperature of 180 °C for a reaction time of 20 minutes to obtain a reaction liquid;

[0028] 2) After cooling the reaction solution to room temperature, filter it with a 0.45um membrane filter, extract the filtered clear liquid with ethyl acetate, the volume ratio of the clear liquid to ethyl acetate is 1:1, and repeat the extraction process 4 times , collect all the extracts;

[0029] 3) Levulinic acid can be obtained by rectif...

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Abstract

The invention relates to a method for extracting levulinic acid from biomass hydrolysate glucose. The method comprises the steps of by taking ionic liquid as a reaction system, and a solid acid catalyst as a catalyst, performing heating reaction, and specially comprises the steps of 1) mixing ionic liquid, glucose and distilled water, adding solid acid catalyst ZrP2, then reacting in a microwave heating reactor to obtain reaction liquid; 2) filtering the reaction liquid through a filter membrane, extracting clarified liquid with ethyl acetate, and collecting all extraction liquid; 3) rectifying the extraction liquid to obtain levulinic acid. The method has the advantages that the extraction method is simple to operate, fast in reaction speed, low in energy consumption and low cost, easy to operate, and safe and reliable; by introducing the ionic liquid reaction system, the energy consumption for producing levulinic acid can be greatly saved; through the introduction of the catalyst ZrP2, the occurrence of side effect can be decreased, the high-value utilization of glucose and cellulose can be realized, and remarkable economic benefits and environment benefits can be gained.

Description

technical field [0001] The invention relates to the preparation of chemical product levulinic acid, in particular to a method for extracting levulinic acid from biomass hydrolyzate glucose. Background technique [0002] With the development of social economy and the improvement of people's living standards, the discharge of biomass solid waste has increased sharply, which has brought great threats to the environment. Biomass is a resource with great utilization value in solid waste. The traditional incineration method not only wastes resources but also pollutes the environment. This patent attempts to use a new reaction method to realize the high-value utilization of glucose, the hydrolyzed product of biomass. [0003] Ionic liquid is a new type of homogeneous reaction medium for dissolving cellulose. It has the advantages of no pollution, high stability and easy recovery. These characteristics have shown great advantages in improving reaction rate, reaction selectivity and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/00C07C59/185
CPCC07C51/00C07C59/185
Inventor 刘益良李维尊鞠美庭韩国林夏天
Owner NANKAI UNIV
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