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Method for preparing bio-based chemical by taking lignocellulose biomass as raw material

A technology of bio-based chemicals and lignocellulose, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as lengthy preparation methods, reduce costs, improve utilization efficiency, and reduce corrosion Effect

Active Publication Date: 2021-08-06
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to propose a method for preparing bio-based chemicals using lignocellulosic biomass as a raw material, aiming to solve the problem of lengthy routes in existing preparation methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 4g of p-aminobenzenesulfonic acid, 50mL of γ-valerolactone / water mixture (19:1, v:v) and 10g of cellulose model compound (containing 6g of cellulose and 4g of xylan) into a 500mL autoclave , replace the air in the reactor with 1MPa nitrogen for three times, then fill it with 3MPa nitrogen, heat and stir at 180°C for 5h, quickly cool to room temperature, slowly release the pressure, filter, collect the filtrate, and distill under reduced pressure to obtain the product. The yield of furfural is 28.5%. , the yield of 5-hydroxymethylfurfural was 15.0%, and levulinic acid was hardly detected.

Embodiment 2

[0039] Add 4g of sulfamic acid, 50mL of γ-valerolactone / water mixture (19:1, v:v) and 10g of cellulose model compound (containing 6g of cellulose and 4g of xylan) into a 500mL autoclave, and use Replace the air in the reactor with 3MPa nitrogen for three times, then fill it with 3MPa nitrogen, heat and stir at 180°C for 4h, quickly cool to room temperature, slowly release the pressure, filter, collect the filtrate, and distill under reduced pressure to obtain the product. The yield of furfural is 42.4%, 5 -Hydroxymethylfurfural yield was 35.8%, and levulinic acid was barely detected.

Embodiment 3

[0041] Add 4g of cobalt sulfamate, 50mL of γ-valerolactone / water mixture (19:1, v:v) and 10g of cellulose model compound (containing 6g of cellulose and 4g of xylan) into a 500mL autoclave, Replace the air in the reaction kettle with 3MPa nitrogen for three times, then fill it with 3MPa nitrogen, heat and stir at 180°C for 4h, rapidly cool to room temperature, slowly release the pressure, filter, collect the filtrate, and distill under reduced pressure to obtain the product. The yield of furfural is 17.7%. The yield of 5-hydroxymethylfurfural was 3.5%, and levulinic acid was barely detected.

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PUM

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Abstract

The invention discloses a method for preparing a bio-based chemical by taking lignocellulose biomass as a raw material, wherein the method for preparing the bio-based chemical by taking the lignocellulose biomass as the raw material comprises the following steps: mixing a polar aprotic solvent and water according to a volume ratio of (10-50):1 to obtain a composite solvent; and adding holocellulose raw materials and an organic acid catalyst into the composite solvent, carrying out hydrolysis reaction, and separating and purifying to obtain the bio-based chemical, wherein the holocellulose raw material comprises cellulose and hemicellulose, and the bio-based chemical comprises one or more of furfural, 5-hydroxymethylfurfural and levulinic acid. According to the method, the holocellulose raw material can be directionally and directly hydrolyzed to generate furfural compounds and / or levulinic acid, the steps are few, the process is simple, the comprehensive utilization process route of biomass resources is shortened, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of biomass reuse, in particular to a method for preparing bio-based chemicals by using lignocellulosic biomass as a raw material. Background technique [0002] With the development of industry and the increase of population, energy consumption continues to increase, and the greenhouse effect and climate warming caused by the use of petrochemical resources are becoming more and more serious, resulting in the continuous deterioration of the environment and the increasing scarcity of energy, which has become a constraint on the sustainable development of human society. The bottleneck of sustainable development, it is imminent to develop a new type of non-polluting energy that is cheap, safe, environmentally friendly and sustainable. Lignocellulose is a renewable resource rich in content and low in price on the earth. Its reserves are about 1.8 trillion tons, which is equivalent to 64 billion tons of oil. It is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/50C07D307/48C07C51/00C07C59/185
CPCC07D307/50C07D307/48C07C51/00C07C59/185
Inventor 范国枝宋光森程群鹏闫俊涛柴波
Owner WUHAN POLYTECHNIC UNIVERSITY