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Method for preparing phenolic resin by utilizing maize straw

A technology of corn straw and phenolic resin, which is applied in the field of phenolic resin preparation, can solve problems such as human and environmental threats, achieve the effects of low production cost, solve the problem of utilization of waste crop straws, and facilitate large-scale production

Inactive Publication Date: 2017-05-17
吉林中邦油沙豆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The raw materials phenol and aldehyde used in the synthesis of phenolic resin are highly toxic substances. During the reaction process, due to the excess of phenol, the production wastewater contains a relatively high concentration of free phenol. These two aspects have brought great harm to people and the environment. big threat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of method utilizing corn stalks to prepare phenolic resin, comprises the steps:

[0026] 1) Pretreating corn stalks to obtain lignin residues;

[0027] 2) Add the mixed solvent of the lignin residue, glycerol and water, and 10% sodium hydroxide to the pressure reactor, and feed nitrogen into the pressure reactor to check the airtightness of the pressure reactor; when the pressure of the nitrogen in the pressure reactor is 2MPa When stirring at a speed of 300r / min, the temperature was raised to 290°C at a heating rate of 5°C / min; reacted at 290°C for 50 minutes to obtain a mixture;

[0028] 3) putting the mixture into a water bath for quenching, then washing with methanol and filtering to obtain a bio-oil solution; rotating the bio-oil solution to obtain light bio-oil;

[0029] 4) adding and condensing the light bio-oil and formaldehyde to obtain a phenolic resin.

Embodiment 2

[0031] A kind of method utilizing corn stalks to prepare phenolic resin, comprises the steps:

[0032] 1) Pretreating corn stalks to obtain lignin residues;

[0033] 2) Add the mixed solvent of the lignin residue, glycerol and water, and 10% sodium hydroxide to the pressure reactor, and feed nitrogen into the pressure reactor to check the airtightness of the pressure reactor; when the pressure of the nitrogen in the pressure reactor is 3MPa When stirring at a speed of 350r / min, the temperature was raised to 290°C at a heating rate of 10°C / min; reacted at 290°C for 40min to obtain a mixture;

[0034] 3) putting the mixture into a water bath for quenching, then washing with methanol and filtering to obtain a bio-oil solution; rotating the bio-oil solution to obtain light bio-oil;

[0035] 4) add and condense the light bio-oil and formaldehyde to obtain phenolic resin

Embodiment 3

[0037] A kind of method utilizing corn stalks to prepare phenolic resin, comprises the steps:

[0038] 1) Pretreating corn stalks to obtain lignin residues;

[0039] 2) Add the mixed solvent of the lignin residue, glycerol and water, and 8% sodium hydroxide to the pressure reactor, and feed nitrogen into the pressure reactor to check the airtightness of the pressure reactor; when the pressure of the nitrogen in the pressure reactor is 2MPa When stirring at a speed of 300r / min, the temperature was raised to 290°C at a heating rate of 10°C / min; reacted at 290°C for 50 minutes to obtain a mixture;

[0040] 3) putting the mixture into a water bath for quenching, then washing with methanol and filtering to obtain a bio-oil solution; rotating the bio-oil solution to obtain light bio-oil;

[0041] 4) adding and condensing the light bio-oil and formaldehyde to obtain a phenolic resin.

[0042] The phenolic resin prepared by the invention exists stably at 290 DEG C and begins to soft...

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Abstract

The invention discloses a method for preparing phenolic resin by utilizing maize straw. The method comprises the following steps of 1), carrying out pretreatment on the maize straw, so as to obtain a lignin residue; 2), adding the lignin residue, a solvent and a catalyst into a pressure reaction kettle, introducing nitrogen into the pressure reaction kettle, and carrying out stirring reaction, so as to obtain a mixture; 3), washing and filtering the mixture, so as to obtain a biological oil solution; carrying out rotary evaporation on the biological oil solution, so as to obtain light-weight biological oil; 4), making the light-weight biological oil react with formaldehyde, so as to obtain the phenolic resin. The method for preparing the phenolic resin by utilizing the maize straw, which is provided by the invention, is low in production cost, and is liable to mass production; not only is the problem of the utilization of junked and abandoned crop straw solved, but also the problems that production wastewater in the preparation process of the phenolic resin contains higher-concentration free phenol and brings about great threats to both a person and an environment are solved.

Description

technical field [0001] The invention belongs to the field of phenolic resin preparation; in particular, it relates to a method for preparing phenolic resin by using corn stalks. Background technique [0002] As one of the earliest industrialized synthetic resins, phenolic resin has been continuously expanded with the continuous research and development of people, and has become a synthetic resin with excellent performance and wide application. In recent years, my country has become a big country in the consumption and production of phenolic resin, and the production technology of phenolic resin has made great progress, but there is still an obvious gap compared with foreign advanced technology. In the growing market competition, technological innovation must be increased efforts to enhance market competitiveness. With the increasing global demand for phenolic resins and the continuous innovation of research and development technologies, more and more high-performance phenoli...

Claims

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Application Information

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IPC IPC(8): C08G8/08
CPCC08G8/08
Inventor 盖琨朱博黄志江
Owner 吉林中邦油沙豆有限公司
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