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A method of using ultrasonic microwave to strengthen deep eutectic solvent to dissociate corn stalks

A technology of deep eutectic solvent and corn stalks, which is applied in the fields of pulping, papermaking, textiles and papermaking with organic compounds, can solve the problems of high equipment requirements, high cost, and large pollution, and achieve simple operation, shortened heating time, high efficiency effect

Active Publication Date: 2022-06-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of traditional pretreatment methods such as high cost, high pollution, poor efficiency and high requirements for equipment, the purpose of this invention is to develop a simple, easy, environmentally friendly and efficient method, so that the reaction conditions are more mild.

Method used

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  • A method of using ultrasonic microwave to strengthen deep eutectic solvent to dissociate corn stalks
  • A method of using ultrasonic microwave to strengthen deep eutectic solvent to dissociate corn stalks
  • A method of using ultrasonic microwave to strengthen deep eutectic solvent to dissociate corn stalks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) First weigh 14g of choline chloride and 12.6g of oxalic acid and mix and stir at 60°C. After a clear solution is formed, continue to add 4.6g of glycerol and continue to stir until a homogeneous and transparent deep eutectic solvent is obtained.

[0043] (2) 12 g of deep eutectic solvent and 1.2 g of corn stover were added to the test tube and stirred to ensure that the deep eutectic solvent and corn stover were fully contacted.

[0044] (3) Put the mixed test tube into the ultrasonic tank of the three-frequency combined ultrasonic, set the power of the 20kHz ultrasonic transmitter to 180W, the working interval ratio to 20s:10s, and ensure that the ultrasonic irradiation time is 30min. For the accuracy of the experimental data, three parallel experiments were performed for each group of experiments.

[0045] (4) After the sonication, put all the sample groups into the microwave digestion apparatus, set the microwave temperature to 100°C, and keep it for 20 minutes. ...

Embodiment 2

[0049] (1) First weigh 14g of choline chloride and 12.6g of oxalic acid and mix and stir at 60°C. After a clear solution is formed, continue to add 4.6g of glycerol and continue to stir until a homogeneous and transparent deep eutectic solvent is obtained.

[0050] (2) 12 g of deep eutectic solvent and 1.2 g of corn stover were added to the test tube and stirred to ensure that the deep eutectic solvent and corn stover were fully contacted.

[0051] (3) Put the mixed test tube into the ultrasonic tank of the three-frequency combined ultrasonic, set the power of the 20kHz ultrasonic transmitter to 120W, the working interval ratio to 20s:10s, and ensure that the ultrasonic irradiation time is 30min. For the accuracy of the experimental data, three parallel experiments were performed for each group of experiments.

[0052] (4) After the sonication, put all the sample groups into the microwave digestion apparatus, set the microwave temperature to 100°C, and keep it for 20 minutes. ...

Embodiment 3

[0056] (1) First weigh 14g of choline chloride and 12.6g of oxalic acid and mix and stir at 60°C. After a clear solution is formed, continue to add 4.6g of glycerol and continue to stir until a homogeneous and transparent deep eutectic solvent is obtained.

[0057] (2) 12 g of deep eutectic solvent and 1.2 g of corn stover were added to the test tube and stirred to ensure that the deep eutectic solvent and corn stover were fully contacted.

[0058] (3) Put the mixed test tube into the ultrasonic tank of the three-frequency combined ultrasonic, set the power of the 20kHz and 40kHz ultrasonic transmitters to 60W, the working interval ratio is 20s:10s, and ensure that the ultrasonic irradiation time is 30min. For the accuracy of the experimental data, three parallel experiments were performed for each group of experiments.

[0059] (4) After the sonication, put all the sample groups into the microwave digestion apparatus, set the microwave temperature to 100°C, and keep it for 2...

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Abstract

The invention discloses a method for dissociating corn stalks by using ultrasonic microwaves to strengthen deep eutectic solvents, and belongs to the technical field of corn stalk component separation. Use choline chloride, oxalic acid and glycerin as raw materials to synthesize a deep eutectic solvent as a solvent, mix it with corn stalks in a certain proportion, put it into a multi-frequency combined ultrasonic transmitter for a period of time, take it out and then put it into microwave digestion After the reaction is completed, the corn stalks in the system are regenerated and the components are determined; the deep eutectic solvent constructed by the present invention is cheap, natural, and pollution-free, and the ultrasonic microwave system selected not only has outstanding effects, but also The deconstruction of corn stalks can be realized under very mild conditions, and it is a new method for dissociating components of corn stalks.

Description

technical field [0001] The invention belongs to the technical field of separation of corn stalk components, and specifically designs a method for dissociating corn stalks by using ultrasonic microwaves to strengthen deep eutectic solvents. Background technique [0002] With social development, population and economy continue to grow, petrochemical energy consumption is increasing year by year. As a kind of non-renewable energy, the storage capacity of petrochemical energy is very limited. At the same time, the combustion of fossil energy will produce a large amount of greenhouse gases, and the environmental problems brought about by these greenhouse gases have attracted more attention. Corn stalk energy widely exists in nature, it has many characteristics such as wide sources, large reserves, low carbon and environmental protection. Among them, lignocellulosic corn stover has great potential. Generally speaking, lignocellulosic corn stover is mainly composed of cellulose,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C5/00D21C3/00D21C3/22
CPCD21C5/00D21C3/003D21C3/224
Inventor 周存山严冬姬青华余筱洁
Owner JIANGSU UNIV
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