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A method of biorefining bagasse lignin-based phenolic resin and its application

A phenolic resin and biorefining technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of low accessibility of lignin, limitations of lignin industrial utilization, etc., and achieve high Reactivity, stable performance, and the effect of reducing production costs

Active Publication Date: 2018-11-06
GUANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The industrial utilization of lignin has been limited because of its low reaction accessibility

Method used

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  • A method of biorefining bagasse lignin-based phenolic resin and its application

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Experimental program
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Effect test

Embodiment 1

[0029] A method for biorefining bagasse lignin-based phenolic resin, comprising the following steps:

[0030] (1) Catalytic degradation of lignin: In parts by weight, 10 parts of bagasse lignin, 100 parts of ethanol aqueous solution with a mass fraction of 70% and 0.01 part of fluorinated graphene-assembled cesium phosphotungstate were added to the microwave reactor , wherein the weight ratio of fluorinated graphene to cesium phosphotungstate is 7:1, then stir evenly at a speed of 300r / min, control the microwave power to 1000W, stop the reaction after reacting at 180°C for 20min, and cool naturally, Obtain the degraded product;

[0031] (2) Purification of the degradation product: the degraded product was distilled under reduced pressure for 3 hours at a pressure of -0.09MPa and a temperature of 50°C to obtain a purified product;

[0032] (3) Preparation of phenolic resin: In parts by weight, add 1 part of the purified product and 19 parts of phenol into the reactor, stir at ...

Embodiment 2

[0034] A method for biorefining bagasse lignin-based phenolic resin, comprising the following steps:

[0035] (1) Catalytic degradation of lignin: In parts by weight, 10 parts of bagasse lignin, 300 parts of ethanol aqueous solution with a mass fraction of 75% and 0.08 parts of fluorinated graphene-assembled cesium phosphotungstate were added to the microwave reactor , wherein the weight ratio of fluorinated graphene to cesium phosphotungstate is 8:1.5, then stir evenly at a speed of 300r / min, control the microwave power to 1000W, stop the reaction after reacting at 200°C for 35min, and after natural cooling, Obtain the degraded product;

[0036] (2) Purification of the degradation product: the degraded product was distilled under reduced pressure for 3.5 hours at a pressure of -0.095 MPa and a temperature of 50° C. to obtain a purified product;

[0037] (3) Preparation of phenolic resin: In parts by weight, add 20 parts of the purified product and 40 parts of phenol into the...

Embodiment 3

[0039] A method for biorefining bagasse lignin-based phenolic resin, comprising the following steps:

[0040] (1) Catalytic degradation of lignin: In parts by weight, 10 parts of bagasse lignin, 250 parts of ethanol aqueous solution with a mass fraction of 85% and 0.3 parts of fluorinated graphene-assembled cesium phosphotungstate were added to the microwave reactor , wherein the weight ratio of fluorinated graphene to heteropoly acid salt is 3:1, then stir evenly at a speed of 300r / min, control the microwave power to 1000W, stop the reaction after reacting at 250°C for 60min, and after natural cooling, Obtain the degraded product;

[0041] (2) Purification of the degradation product: the degraded product was distilled under reduced pressure for 4 hours at a pressure of -0.094MPa and a temperature of 50°C to obtain a purified product;

[0042] (3) Preparation of phenolic resin: In parts by weight, 30 parts of the purified product and 45 parts of phenol were added to the react...

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Abstract

The invention discloses a method for bio-refinery of bagasse lignin phenolic resin and application of bagasse lignin phenolic resin. The method includes following steps: (1), catalytically degrading lignin: directionally degrading lignin into a monophenolic compound under microwave assistance; (2), purifying a degradation product: performing rotary evaporation at low temperature to remove a reaction solvent; (3), preparaing phenolic resin: using the degradation product to partly replace phenol to react with formaldehyde to prepare the phenolic resin. Compared with conventional preparation methods of lignin-based phenolic resin, the method has the advantages that lignin can be catalyzed into high-reaction-activity 4-ethylphenol in a high-efficiency and high-selectivity manner through a unique fluorinated graphene assembled heteropoly catalyst; the catalyst can catalyze condensation reaction between the lignin degradation product as well as phenol and formaldehyde to prepare the lignin-based phenolic resin, so that separation and extra adding of the catalyst are omitted. The method has the advantages of high efficiency, low cost and high applicability.

Description

【Technical field】 [0001] The invention relates to the fields of industrial catalysis and polymer materials, in particular to a method for biologically refining bagasse lignin-based phenolic resin. 【Background technique】 [0002] Bagasse lignin is a complex phenolic polymer composed of multiple phenylpropane structural units (mainly guaiacyl structure, syringyl structure and p-hydroxyphenyl structure), which is renewable, carbon neutral, low It is a kind of high-quality raw material for biorefinery; with the decrease of fossil energy, it has become extremely important to use woody biomass such as bagasse lignin as raw material to obtain energy, fuel and chemicals through biorefinery. important. With the full understanding of lignin's unique single-ring aromatic ring unit structure and chemical characteristics and the development of related catalytic science and technology, bagasse lignin can be converted into various high Active chemical intermediates are used in the synthe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/12B01J31/18
CPCB01J27/188C08G8/12
Inventor 黎演明杜芳黎李秉正冼学权陈东
Owner GUANGXI ACAD OF SCI