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Method for liquefying straws by ionic liquid

An ionic liquid and straw technology, applied in the direction of adhesive type, lignocellulosic material adhesive, etc., can solve the problems of low residue rate, mild liquefaction conditions and can not have both, achieve rich sources, reduce liquefaction residue rate, equipment less corrosive effect

Inactive Publication Date: 2012-06-13
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems in the prior art, we have conducted a lot of research and found that 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.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The ionic liquid used is 1-butyl-3-methylimidazolium chloride ([bmin]Cl)

[0021] The implementation method is: add 10g[bmin]Cl and 0.5g straw to a three-necked flask, 2 Stir in an oil bath and heat to 100°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

[0023] 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.

[0024] Table 1 The results of liquefaction of straw with different qualities in ionic liquid

[0025]

Embodiment 5～7

[0027] 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.

[0028] Table 2 Liquefaction of straw in different ionic liquids

[0029]

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PUM

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Abstract

The invention relates to a method for liquefying straws by ionic liquid. The method for liquefying straws by ionic liquid is characterized in that the ionic liquid which comprises anions and mononuclear and binuclear nitrogen-containing compounds composed of alkylimidazoles, alkylpyridines and quaternary ammonium salts and is liquid at a room temperature is utilized as a liquefaction agent for straw liquefaction. Compared with a traditional liquefaction method, the method provided by the invention has simple processes, a high liquefaction rate, low corrosivity, does not produce pollution, adopts the structure-adjustable and recyclable liquefaction agent, and is conducive to environmental protection. A liquefaction product obtained by the method provided by the invention can be directly utilized for preparation of novel polymer materials of adhesives, polyurethane foaming plastic, fibers and carbon fibers.

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 ionic liquid. Background technique [0002] With the requirements of sustainable development and the enhancement of people's awareness of environmental protection, the research and development of biodegradable environment-friendly products has attracted more and more international attention and attention. Straw, as a natural and renewable resource, has increasingly attracted people's attention. At present, the main uses of straw in my country are papermaking, feed, returning to the field and used as fuel, which is completely in a state of high consumption, high pollution, and low output, and the utilization rate of straw is very low. The main components of straw are cellulose, hemicellulose and lignin, which contain a large number of active groups represented by hydroxyl groups. However, due to the large amount of cellulo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H8/00C09J197/02C08G18/64
Inventor 王海军季文艳夏晓莉宋启霞许冰冰张华马洁丁振东
Owner JIANGNAN UNIV
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