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Method for preparing furan or furfural compound from biomass cellulose

A cellulose and biomass technology, applied in chemical recycling, organic chemistry and other directions, can solve the problems of increasing process cost and difficult practical application, and achieve the effect of low cost, favorable for large-scale production and simple process conditions

Active Publication Date: 2012-10-03
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of biochemicals, cellulose can be used to prepare an important platform molecule 5-hydroxymethylfurfural. First, monosaccharides (glucose or fructose) are obtained by hydrolyzing cellulose in ionic liquids, and then further converted into 5-hydroxymethylfurfural in the presence of catalysts. Methylfurfural, considering the higher requirements for process conditions with 5-hydroxymethylfurfural as the target product, the invention patent with application number 200980122910.4 takes furan compounds as the target product, and proposes a method for extracting furans from biomass Compounds include methods for furfural compounds, but these processes often require strict condition control (including temperature and pH), and at the same time, a large number of configurations and uses of ionic solutions, catalysts, and extractants in the preparation process have greatly increased the cost of the process. Bottleneck that causes difficulty in practical application

Method used

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  • Method for preparing furan or furfural compound from biomass cellulose
  • Method for preparing furan or furfural compound from biomass cellulose

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Using high-purity cellulose as raw material, take 10g (by dry weight) of the raw material and pour it into a 250ml liquefaction reactor, add 150ml of distilled water, and fill the reactor with N 2 Until the air in the reaction kettle is completely exhausted, heat up to 150°C while stirring, keep it for 60min, then stop the reaction, cool the reactor to room temperature rapidly, pour out the reaction mixture, separate the reaction mixture from solid to liquid, and analyze the obtained liquid phase The solution is extracted with ether, and the water-soluble product is obtained by separation. After removing the ether, the product 1 is obtained, and the yield can reach 14.8% (ratio to the dry weight of the raw material). The ether can be recovered and recycled; the obtained solid phase is extracted with tetrahydrofuran, filtered Get tetrahydrofuran solution, remove tetrahydrofuran to get product 2, the yield can reach 12.2% (to the raw material dry weight ratio), tetrahydrof...

Embodiment 2

[0018] Using high-purity cellulose as raw material, take 10g (by dry weight) of the raw material and pour it into a 250ml liquefaction reactor, add 150ml of distilled water, heat up to 180°C while stirring, keep it for 10min, then stop the reaction, and cool the reactor rapidly To room temperature, pour out the reaction mixture, carry out solid-liquid separation to the reaction mixture, extract the obtained liquid phase solution with ethyl acetate, separate and obtain the water-soluble phase product, remove the ethyl acetate to obtain the product 1, and the productive rate can reach 16.7% ( Ratio of raw material dry weight), ethyl acetate can be recovered and recycled; the obtained solid phase is extracted with dichloromethane, filtered to obtain a dichloromethane solution, and the product 2 is obtained after removing the dichloromethane, and the yield can reach 15.3% ( Compared with the dry weight of raw materials), dichloromethane can be recovered and recycled; product 1 is r...

Embodiment 3

[0020] Using high-purity cellulose as raw material, take 5g (by dry weight) of the raw material and pour it into a 250ml liquefaction reactor, add 150ml of distilled water, and fill the reactor with 2MPa N 2 , heated up to 260°C while stirring, then stopped the reaction, cooled the reactor rapidly to room temperature, poured out the reaction product, separated the reaction mixture from solid to liquid, extracted the obtained liquid phase solution with dichloromethane, separated to obtain water-soluble Phase product, product 1 is obtained by removing dichloromethane, and the yield can reach 15.9% (ratio to raw material dry weight), and dichloromethane can be recovered and recycled; the obtained solid phase is extracted with dichloromethane, filtered to obtain dichloromethane Methane solution, remove dichloromethane to obtain product 2, the yield can reach 22.9% (to the raw material dry weight ratio), dichloromethane can be recovered and recycled; product 1 is rich in 5-hydroxyme...

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Abstract

The invention belongs to the technical field of conversion of biomass, and in particular relates to a method for preparing a furan compound or a furfural compound by processing biomass cellulose by a hydrothermal liquefaction method. By the method, a furan compound product or a furfural compound product is obtained by processing the biomass cellulose by the hydrothermal liquefaction method under a relatively mild condition by taking the biomass cellulose as a raw material and water as a reaction solvent. The method comprises the following steps: extracting cellulose from biomass, and adding the cellulose into a liquefaction reactor with water in appropriate proportion by taking the cellulose as the raw material; reacting the obtained solution for 0 to 60 min at a certain temperature, and then, taking the obtained product out; and finally, filtering, separating and recycling the solvent by distillation to obtain a product rich in the furan compound or the furfural compound (comprising 5-hydroxymethyl furfural). The preparation method is simple and convenient, can implement the complete recovery of the solvent, has low pollution and a low cost, is favorable for the implementation of industrial production, and provides a new way for efficiently preparing the furan compound and the furfural compound from the biomass cellulose.

Description

technical field [0001] The invention belongs to the technical field of biomass conversion, and in particular relates to a hydrothermal liquefaction method for preparing furan and furfural compounds from biomass cellulose components. Background technique [0002] As a renewable energy source, biomass can be divided into flora biomass and fauna biomass. Plants are one of the most important biomass. The main component is lignocellulose, which is mainly composed of cellulose, hemicellulose and lignin. Among them, cellulose is one of the main components of biomass cell walls such as plants, algae and fungi. , as the most abundant polymer on the earth, the average molecular weight of cellulose is about 100,000, and the annual output is about 1.5×10 12 t, so the conversion and utilization of cellulose has very important theoretical and practical significance. [0003] Since plant biomass also contains components such as lignin, which will have a certain impact on the conversion ...

Claims

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Application Information

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IPC IPC(8): C07D307/46C07D307/06
CPCY02P20/582
Inventor 张士成张良李长军陈建民
Owner FUDAN UNIV
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