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Method for liquefying straws by acidic ionic liquid

A technology of ionic liquid and straw, which is applied in the field of comprehensive utilization of biomass, can solve the problems of mild liquefaction conditions, harsh liquefaction conditions, and large amount of solvents, etc., to achieve reduced liquefaction residue rate, good thermal stability, and improved liquefaction efficiency Effect

Inactive Publication Date: 2014-03-26
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems in the prior art, we have conducted a lot of research and found that acidic ionic liquids can be used to liquefy straw, which can greatly reduce the difficulty of liquefaction, and solve the problem of low residue rate and mild liquefaction conditions.
On the one hand, using acidic ionic liquid as a catalyst can replace the traditional acid catalyst to liquefy straw under normal pressure, which solves the problem of harsh liquefaction conditions. On the other hand, it solves the problem of large amount of solvent and equipment corrosion, and reduces environmental pollution.

Method used

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  • Method for liquefying straws by acidic ionic liquid
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  • Method for liquefying straws by acidic ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The ionic liquid used is 1-sulfonic acid propyl group-3-methylimidazolium bisulfate ([C 3 SO 3 minHSO 4 ])

[0018] The implementation method is: put 10g[C 3 SO 3 min] HSO 4 and 0.5g of straw were added to the three-neck flask, under N 2 Stir the oil bath and heat to 150°C, react for a period of time, stop the reaction when the color of the solution changes from colorless to purple-brown, and filter the mixture at the reaction temperature or slightly lower temperature to obtain the liquefied product. The residue was dried at 105°C to constant weight, and the liquefaction yield was 95%.

Embodiment 2～4

[0020] The implementation method is as follows: follow the same experimental procedure as in Example 1, but use different ionic liquid / straw mass ratios, and the results are shown in Table 1.

[0021] Table 1 The results of liquefaction of straw with different qualities in ionic liquid

[0022] project

Embodiment 5～7

[0024] The implementation method is: according to the same experimental procedure as in Example 1, but using different ionic liquids, the results are shown in Table 2.

[0025] Table 2 Liquefaction of straw in different ionic liquids

[0026]

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Abstract

The invention relates to a method for liquefying straws by acidic ionic liquid. The method is characterized in that the straws are liquefied by adopting ionic liquid, which is prepared from mononuclear and binuclear nitrogen-containing compounds formed by alkylimidazole, alkylpyridine and the like and negative ions and is in a liquefied state at room temperature, as a liquefying agent. Compared with the traditional liquefaction methods, the method has the characteristics of simple process, high liquefaction ratio, low corrosiveness and clean process, and the liquefying agent has the characteristics of structural adjustability, reusability, being beneficial to environmental protection, and the like. A liquefaction product obtained by adopting the method provided by the invention can be directly used for preparing novel macromolecular materials, such as binders and the like.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of biomass, in particular to a method for liquefying straw by using an acidic ionic liquid. Background technique [0002] Straw biomass is abundant in nature, renewable, environmentally friendly, and degradable, but it has not been widely used so far, which not only causes waste of resources, but also causes environmental pollution. Liquefaction is a convenient and efficient technology that opens the door to harnessing the planet's vast abundance of biomass. Under high temperature and pressure or solvation, components in straw such as cellulose, hemicellulose, and lignin can be converted into low-molecular-weight, high-activity substances, and these small-molecular substances can be used to prepare polyurethane foams, resins (phenol and Epoxy resin) and adhesives and other polymer materials, the commonly used liquefaction methods are phenol liquefaction and polyhydric alcohol liquefaction...

Claims

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Application Information

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IPC IPC(8): C08H8/00
Inventor 王海军宋展欣刘文涛杨艳王宁宁
Owner JIANGNAN UNIV
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