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Lignin modified phenol furfural resin for moulding material and preparation method thereof

A technology for furfural phenol resin and lignin, which is applied in the field of lignin-modified furfural phenol resin and its preparation, can solve the problems of environment pollution, environmental pollution, waste of resources, etc. The effect of reducing the processing cost

Inactive Publication Date: 2007-10-24
JIANGSU QIANGLIN BIO ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In nature, the reserve of lignin is second only to cellulose, and it is regenerated at a rate of about 50 billion tons per year. The pulp and paper industry needs to separate 140 million tons of cellulose from plants every year, and at the same time obtain about 50 million tons of wood. Lignin by-products, but so far, more than 95% of the separated lignin is still directly discharged into rivers to pollute the environment or concentrated and burned
This not only wastes resources greatly, but also causes serious pollution to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A lignin-modified trinatured furfural phenol resin used in molding compounds, with a molecular weight range of 1000-11000, such as 1500, 3000, 5000, 8000, 10000, and a softening point temperature of 106°C-135.5°C, such as 110°C, 115°C °C, 120 °C, 123 °C, 128 °C, 129 °C, 133 °C, can be prepared by the following method: mix phenol and alkali catalyst, heat to 100 °C-150 °C, for example, the temperature can be selected as 110 °C, 120 °C, 130°C, 132°C, 138°C, 142°C, 146°C, 149°C, then add furfural to the above mixture dropwise, the dropping time is 1.5 hours-3.5 hours, the reaction time can be selected as 1.6, 1.9 hours, 2.1 hours , 2.3 hours, 2.5 hours, 2.7 hours, 2.8 hours, 3.2 hours, 3.4 hours, dropwise and then react for 3.5 hours-6.0 hours, the time can be selected as, 3.8 hours, 4.4 hours, 4.9 hours, 5.3 hours, 5.9 hours, Get furfural phenol resin, then add lignin, react at 150°C-200°C for 4 hours-8 hours until no water is released, the temperature can be 155°C, 170°C...

Embodiment 2

[0021] A preparation method of lignin-modified furfural phenol resin, mixing phenol and alkali catalyst, heating to 100°C-150°C, for example, the temperature can be selected from 110°C, 120°C, 130°C, 132°C, 138°C, 142°C , 146°C, 149°C, then add furfural to the above mixture dropwise, the dropping time is 1.5 hours-3.5 hours, the reaction time can be selected as, 1.6, 1.9 hours, 2.1 hours, 2.3 hours, 2.5 hours, 2.7 hours, 2.8 hours Hours, 3.2 hours, 3.4 hours, dropwise and then reacted for 3.5 hours-6.0 hours, the time can be selected as, 3.8 hours, 4.4 hours, 4.9 hours, 5.3 hours, 5.9 hours, to obtain furfural phenol resin, then add lignin, in React at 150°C-200°C for 4 hours-8 hours until no water is released, the temperature can be 155°C, 170°C, 185°C, 192°C, 197°C, the time can be selected as 4.5 hours, 5 hours, 5.6 hours, 6.5 hours, 7.3 hours, 7.8 hours, vacuum distillation, obtained lignin modified furfural phenol resin,

[0022] Wherein, the mass ratio of phenol and alk...

Embodiment 3

[0026] A lignin-modified furfural phenol resin used in molding compounds, with a molecular weight range of 1000-11000, such as 5000, 8000, and a softening point temperature of 106°C-135.5°C, which can be 110°C, 115°C, 118°C, 123°C ℃, 134°C (usually the average softening point temperature), can be prepared by the following method: mix phenol and alkali catalyst, heat to 140°C-160°C, for example, it can be selected as 142°C, 145°C, 148°C, 150°C °C, 152 °C, 154 °C, 155 °C, 158 °C, 159 °C, then add furfural dropwise to the reaction system, the drop time is 1.5 hours to 2.5 hours, can be selected as 1.7 hours, 1.9 hours, 2.2 hours, 2.4 hours Hours, dropwise and then react for 3.5 hours-4.5 hours, can be selected as 3.7 hours, 3.9 hours, 4.2 hours, 4.4 hours, react to obtain furfural phenol resin, then add lignin, this lignin can be wood hydrolysis industry, papermaking One of dilute acid hydrolyzed lignin, concentrated acid lignin, kraft lignin, alkali lignin, lignosulfonate, demet...

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Abstract

The invention discloses a making method of modified furfural phenol resin of lignin of mould plastic with molecular weight at 1000-11000 and softening point temperature at 106-135. 5 deg. c, which comprises the following steps: blending phenol and alkaline catalyst; heating to 140-200 deg. c; dripping furfural into the reacting system to obtain the furfural phenol resin; adding lignin to react under 150-200 deg. c for 4-8h until water is not released; decompressing; distilling; extracting into vacuum; obtaining the product. The invention uses rich lignin to replace phenol to prepare phenol resin, which reduces cost obviously.

Description

technical field [0001] The invention relates to a phenolic resin and a preparation method thereof, in particular to a lignin-modified furfural phenol resin used in molding materials and a preparation method thereof. Background technique [0002] Phenolic resin (PF), which is formed by polycondensation of phenolic compounds (mainly phenol) and aldehyde compounds (mainly formaldehyde) under the action of a catalyst, is low in price, heat-resistant, ablation-resistant, flame-retardant, and burns less smoke, etc. Widely used in varnishes, adhesives, coatings, membrane plastics, laminated plastics, foam plastics, anti-corrosion mastics and ion exchange resins. The production and use of phenolic resin will bring a certain degree of pollution to the environment and affect the entire ecological environment. In the production of phenolic resin, a large amount of wastewater is produced. The wastewater is mainly phenols and aldehydes, which are produced fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/28C08G8/06
Inventor 周永红张猛胡立红李书龙
Owner JIANGSU QIANGLIN BIO ENERGY
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