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Homogeneous method for preparing wood fiber derivative under room temperature

A technology for lignocellulosic and derivatives, which is applied in the field of homogeneous preparation of lignocellulosic derivatives at room temperature, can solve the problems of high requirements for equipment and energy and uneven properties of derivatives, and achieve uniform and stable product properties, short modification time, The effect of easy operation

Inactive Publication Date: 2011-05-11
广西南宁绿园北林木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the lignocellulosic derivatives in the industry are all heterogeneous reaction products, and need to be carried out at a higher temperature (such as 80-140 ° C), resulting in inhomogeneous properties of the derivatives and higher requirements for equipment and energy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The lignocellulosic derivative of the present embodiment realizes the homogeneous derivatization of lignocellulosic fiber at room temperature, and its specific preparation process is as follows:

[0029] Step 1. Grind the eucalyptus into powder by ball milling, and suspend the obtained eucalyptus powder in a mixed solvent of dimethyl sulfoxide / 1-methylimidazole (DMSO / NMI) with a volume ratio of 0.5:1, at room temperature Down stirring makes eucalyptus powder dissolve completely, obtains lignocellulosic solution (eucalyptus solution);

[0030] Adding the acylating reagent (succinic anhydride) into a DMSO / NMI mixed solvent with a volume ratio of 0.5:1, and stirring at room temperature to completely dissolve the acylating reagent to obtain an acylating reagent solution (succinic anhydride solution);

[0031] Step 2. Add the acylating reagent solution prepared above into the lignocellulosic solution, and perform an esterification reaction at room temperature and moisture is...

Embodiment 2

[0035] The lignocellulosic derivative of the present embodiment realizes the homogeneous derivatization of lignocellulosic fiber at room temperature, and its specific preparation process is as follows:

[0036] Step 1. Grinding wheat straw into powder by ball milling, drying the obtained wheat straw powder and suspending in a mixed solvent of dimethylsulfoxide / 1-methylimidazole (DMSO / NMI) with a volume ratio of 2:1, stirring at room temperature Dissolve the wheat straw powder completely to obtain a lignocellulosic solution (wheat straw solution);

[0037] Adding the acylating reagent (palmitoyl chloride) into a mixed solvent of DMSO / NMI with a volume ratio of 2:1, stirring at room temperature to completely dissolve the acylating reagent to obtain an acylating reagent solution (palmitoyl chloride solution);

[0038] Step 2. Add the acylating reagent solution prepared above into the lignocellulosic solution, and perform an esterification reaction for 1 hour at room temperature a...

Embodiment 3

[0042] The lignocellulosic derivative of the present embodiment realizes the homogeneous derivatization of lignocellulosic fiber at room temperature, and its specific preparation process is as follows:

[0043] Step 1. The bagasse powder is ground into powder by ball milling, and the obtained bagasse powder is dried and suspended in a mixed solvent of dimethyl sulfoxide / 1-methylimidazole (DMSO / NMI) with a volume ratio of 3:1, and stirred at room temperature Dissolve the bagasse powder completely to obtain a lignocellulosic solution (bagasse solution);

[0044] Add the acylating reagent (phthalic anhydride) to the DMSO / NMI mixed solvent with a volume ratio of 3:1, stir at room temperature to completely dissolve the acylating reagent, and obtain the acylating reagent solution (phthalic anhydride solution) ;

[0045] Step 2. Add the above-mentioned prepared acylating reagent solution into the lignocellulosic solution, and carry out the esterification reaction for 0.5 h at room t...

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Abstract

The invention discloses a homogeneous method for preparing a wood fiber derivative under room temperature. The method comprises the following steps: drying ground wood fiber powder, suspending the dried wood fiber powder in a solvent, and stirring till the wood fiber is dissolved completely to obtain wood fiber solution; dissolving an acylation reagent in the same solvent, and stirring under the room temperature till the acylation reagent is dissolved completely to obtain acylation reagent solution; adding the acylation reagent solution into the wood fiber solution, and carrying out esterification reaction under the room temperature and a moisture isolated condition; and depositing the solution obtained after the esterification reaction, collecting, washing, freezing and drying deposits, and preparing to obtain the required wood fiber derivative. The invention has the advantages that homogeneous derivatization of wood fiber is realized under the room temperature; and not only can the homogeneity and the stability of the product be improved effectively, but also equipment requirements and energy requirements can be reduced. Therefore, the invention has a significant scientific value and practical significance on the development and the utilization of renewable resources such as wood fiber, biological substances and the like.

Description

technical field [0001] The invention relates to the technical field of renewable resources, in particular to the preparation of lignocellulosic derivatives, and in particular to a method for homogeneously preparing lignocellulosic derivatives at room temperature. Background technique [0002] Wood fiber has many advantages such as large quantity and low price, renewable, short regeneration cycle, biodegradable, and environment-friendly. With the increasing shortage of non-renewable resources such as petroleum and coal and the increasing attention and attention to environmental pollution in various countries, the transformation of renewable resources such as wood fiber into high calorific value energy, new industrial raw materials, fine chemicals, food, medicine and feed etc. have inevitably become the trend of future development. Many countries, especially developed countries, have listed the conversion and utilization of wood fiber and other renewable resources as a major s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H8/00
Inventor 刘传富张爱萍孙润仓
Owner 广西南宁绿园北林木业有限公司
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