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Method for dissociating corn stalks by utilizing ultrasonic microwave enhanced deep eutectic solvent

A technology of deep eutectic solvent and corn stalks, which is applied in the fields of pulping with organic compounds, textiles, papermaking, papermaking, etc., 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: 2020-06-23
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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  • Method for dissociating corn stalks by utilizing ultrasonic microwave enhanced deep eutectic solvent
  • Method for dissociating corn stalks by utilizing ultrasonic microwave enhanced deep eutectic solvent
  • Method for dissociating corn stalks by utilizing ultrasonic microwave enhanced deep eutectic solvent

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 glycerin and continue stirring until a uniform and transparent deep eutectic solvent is obtained.

[0043] (2) Add 12 g of deep eutectic solvent and 1.2 g of corn stalks into the test tube and stir to ensure sufficient contact between the deep eutectic solvent and corn stalks.

[0044] (3) Put the well-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 intermittent ratio to 20s:10s, and ensure that the ultrasonic irradiation time is 30min. For the accuracy of the experimental data, three parallel experiments were done for each group of experiments.

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

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 glycerin and continue stirring until a uniform and transparent deep eutectic solvent is obtained.

[0050] (2) Add 12 g of deep eutectic solvent and 1.2 g of corn stalks into the test tube and stir to ensure sufficient contact between the deep eutectic solvent and corn stalks.

[0051] (3) Put the well-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 intermittent ratio to 20s:10s, and ensure that the ultrasonic irradiation time is 30min. For the accuracy of the experimental data, three parallel experiments were done for each group of experiments.

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

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 glycerin and continue stirring until a uniform and transparent deep eutectic solvent is obtained.

[0057] (2) Add 12 g of deep eutectic solvent and 1.2 g of corn stalks into the test tube and stir to ensure sufficient contact between the deep eutectic solvent and corn stalks.

[0058] (3) Put the well-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 respectively, and the work interval ratio is 20s:10s, and ensure that the time of ultrasonic irradiation is 30min. For the accuracy of the experimental data, three parallel experiments were done for each group of experiments.

[0059] (4) After the ultrasound is finished, put all the sample groups into the microwave digestion apparatus, set the microwave temperature to 100°C...

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Abstract

The invention discloses a method for dissociating corn stalks by utilizing an ultrasonic microwave enhanced deep eutectic solvent, and belongs to the technical field of corn stalk component separation. The method comprises the following steps: synthesizing a deep eutectic solvent serving as a solvent by taking choline chloride, oxalic acid and glycerol as raw materials, mixing the deep eutectic solvent with corn stalks according to a certain proportion, putting the mixture into a multi-frequency combined ultrasonic emitter, processing the mixture in the ultrasonic emitter for a period of time,taking out the mixture, putting the mixture into a microwave digestion instrument to carry out digestion; after the reaction is finished, regenerating the corn stalks in the system, and measuring thecomponents. The constructed deep eutectic solvent is cheap, natural and pollution-free, and the selected ultrasonic microwave system not only has an outstanding effect, but also can realize the deconstruction of corn stalks under mild conditions. The method is a novel method for dissociating corn stalk components.

Description

technical field [0001] The invention belongs to the technical field of corn stalk component separation, and specifically designs a method for dissociating corn stalks by using ultrasonic microwaves to strengthen deep eutectic solvents. Background technique [0002] With the development of society, the population and economy continue to grow, and the consumption of petrochemical energy is increasing year by year. As a non-renewable energy source, petrochemical energy reserves are 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 people's attention. Corn straw energy widely exists in nature, and it has many characteristics such as wide sources, large reserves, low carbon and environmental protection. Among them, lignocellulosic corn straw has great potential. Generally speaking, lignocellulosic corn stover is mainly compos...

Claims

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Application Information

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Patent Type & Authority Applications(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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