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Method for preparing chemicals by lignocellulose all-component higher value application

A lignocellulosic and full-component technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of difficult lignocellulosic raw material component utilization and low yield, and achieve reduced losses , reduce production costs, and efficiently utilize the effect

Active Publication Date: 2019-10-08
BEIJING FORESTRY UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that it is difficult to utilize all components of lignocellulosic raw materials in the prior art, and the conversion rate of lignocellulosic raw materials into chemicals is low

Method used

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  • Method for preparing chemicals by lignocellulose all-component higher value application
  • Method for preparing chemicals by lignocellulose all-component higher value application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] (1) Get 10g of eucalyptus with a particle size of 40-60 mesh, add 400mL of methanol and 10wt% Pd / C catalyst, put it into a stainless steel reactor and feed nitrogen to replace the air therein, and then feed 3MPa hydrogen;

[0085] (2) heating the mixture obtained in step (1) to 260° C. for 10 h;

[0086] (3) The solid-liquid separation of the reaction mixture obtained in step (2), the liquid is obtained by rotary evaporation and extraction to obtain phenolic compounds, and the solid residue is recovered by sieving the catalyst;

[0087] (4) Take 1.5 g of the solid carbohydrate residue obtained in step (3) and add 150 mL of MeTHF / NaCl (3:1) solution and 0.1 M FeCl 3 catalyst;

[0088] (5) Heat the mixture obtained in step (4) to 170° C. for 40 minutes, and obtain furfural and levulinic acid in the organic phase by centrifugation;

[0089] (6) Test the yield of phenolic monomers, furfural and levulinic acid in this embodiment, and the retention rate of carbohydrates aft...

Embodiment 2

[0091] (1) Take 10g of eucalyptus wood with a particle size of 40-60 mesh, add 400mL of ethanol and 10wt% Ru / C catalyst, put it into a stainless steel reactor and feed nitrogen, replace the air therein, and then feed 4MPa hydrogen;

[0092] (2) The mixture obtained in step (1) was heated to 240° C. for 4 hours;

[0093] (3) The solid-liquid separation of the reaction mixture obtained in step (2), the liquid is obtained by rotary evaporation and extraction to obtain phenolic compounds, and the solid residue is recovered by sieving the catalyst;

[0094] (4) Take 1.5 g of the solid carbohydrate residue obtained in step (3) and add 150 mL of MeTHF / NaCl (1:0) solution and 0.1 M FeCl 3 catalyst;

[0095] (5) Warm up the mixture obtained in step (4) to 190°C for 120 minutes, and obtain furfural and levulinic acid in the organic phase by centrifugation;

[0096] (6) Test the yield of phenolic monomers, furfural and levulinic acid in this embodiment, and the retention rate of carboh...

Embodiment 3

[0098] (1) Take 10g of birch wood with a particle size of 40-60 mesh, add 400mL of methanol and 10wt% Pd / C catalyst, put it into a stainless steel reactor and feed nitrogen to replace the air, and then feed 4MPa hydrogen;

[0099] (2) The mixture obtained in step (1) was heated to 240° C. for 8 hours;

[0100] (3) The solid-liquid separation of the reaction mixture obtained in step (2), the liquid is obtained by rotary evaporation and extraction to obtain phenolic compounds, and the solid residue is recovered by sieving the catalyst;

[0101] (4) Take 1.5 g of the solid carbohydrate residue obtained in step (3) and add 150 mL of THF / NaCl (3:1) solution and 0.1 M FeCl 3 catalyst;

[0102] (5) Warm up the mixture obtained in step (4) to 170°C for 100 min, and obtain furfural and levulinic acid in the organic phase by centrifugation;

[0103] (6) Test the yield of phenolic monomers, furfural and levulinic acid in this embodiment, and the retention rate of carbohydrates after th...

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Abstract

The invention provides a method for preparing chemicals by lignocellulose all-component higher value application. The method includes the steps: crushing and drying lignocellulose raw materials to obtain raw material particles; performing first reaction on the raw material particles: mixing the raw material particles, alcohol solvents and metal catalysts in a reactor, leading nitrogen into the reactor, leading pressurized hydrogen into the reactor, stirring mixture, heating the mixture to reach first temperature, performing reaction, rapidly cooling the reactor to reach room temperature, and performing solid-liquid separation on reaction mixture to obtain a phenol compound and carbohydrate slurry; performing second reaction on the carbohydrate slurry: adding metal halides and reaction solvents into the carbohydrate slurry, heating the mixture to reach second temperature, performing reaction, centrifuging reaction mixture, and collecting an organic phase product to obtain furfural and levulinic acid. The method is simple in preparation technology, reaction conditions are mild, all-component higher value utilization of lignocellulose can be achieved, production cost is low, and the method has good industrial popularization prospects and is more suitable for practicability.

Description

technical field [0001] The invention belongs to the technical field of biomass energy chemical industry, and in particular relates to a method for preparing chemicals by high-value utilization of all lignocellulose components. Background technique [0002] Due to the non-renewable nature of petrochemical resources, the excessive consumption of petrochemical resources has brought increasingly severe energy and environmental problems. The development and research of renewable resources technology has become a research hotspot around the world. Most of the carbon-containing bulk chemicals are obtained from non-renewable fossil resources such as petroleum and coal through complex transformation processes, which inevitably bring about a series of problems such as greenhouse effect, climate change and environmental pollution. Lignocellulosic resources have the characteristics of extensive sources, huge yields, renewable and their constituent elements are close to those of current ...

Claims

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Application Information

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IPC IPC(8): C07C37/00C07C37/72C07C39/04C07C39/06C07D307/48C07C59/185C07C51/00
CPCC07C37/004C07C37/72C07D307/48C07C51/00C07C39/04C07C39/06C07C59/185
Inventor 宋国勇肖领平陈雪孙润仓张凯利
Owner BEIJING FORESTRY UNIVERSITY
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