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Esterification modification method for wood fiber biomasses

A technology for lignocellulosic and esterification modification, applied in the field of esterification modification of lignocellulosic biomass, can solve the problems of uneven and insufficient modification, complicated operation process, difficult solvent recovery, etc. Extensive, simple and easy-to-operate effects

Inactive Publication Date: 2013-03-13
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned method has the disadvantages of complex operation process, uneven and insufficient modification, easy pollution to the environment, and difficulty in solvent recovery.

Method used

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  • Esterification modification method for wood fiber biomasses
  • Esterification modification method for wood fiber biomasses
  • Esterification modification method for wood fiber biomasses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for esterification modification of lignocellulosic biomass, the specific steps are:

[0036] (1) Take hibiscus branches as raw materials, peel them, dry them, crush them mechanically, and dry them.

[0037] (2) A planetary ball mill is used to perform ball milling pretreatment on the raw materials, and the ball milling time is 15 hours. The material of the ball mill is agate, the capacity is 250mL, the amount of raw materials added is 7.2g, and the number of large, medium and small balls is 5, 30 and 45 respectively. The speed of ball milling is 580r / min, and there is no time interval between forward and reverse rotation; alternately every 90min.

[0038] (3) Add succinic anhydride to the ball-milled raw material, the ratio of raw material to succinic anhydride is 3:1 (w / w). Ball milling again, the material of the ball milling tank is zirconia, the capacity is 100mL, the number of large, medium and small balls is 0, 40, 60 respectively, the mass ratio of the ...

Embodiment 2

[0042] A method for esterification modification of lignocellulosic biomass, the specific steps are:

[0043] (1) Take hibiscus branches as raw materials, peel them, dry them, crush them mechanically, and dry them.

[0044] (2) A planetary ball mill is used to perform ball milling pretreatment on the raw materials, and the ball milling time is 15 hours. The material of the ball mill is agate, the capacity is 250mL, the amount of raw materials added is 7.2g, and the number of large, medium and small balls is 5, 30 and 45 respectively. The speed of ball milling is 580r / min, and there is no time interval between forward and reverse rotation; alternately every 90min.

[0045] (3) Add maleic anhydride to the ball-milled raw material, the ratio of raw material to maleic anhydride is 3:1 (w / w). Ball milling again, the material of the ball milling tank is zirconia, the capacity is 100mL, the number of large, medium and small balls is 0, 40, 60 respectively, the mass ratio of the amou...

Embodiment 3

[0049] A method for esterification modification of lignocellulosic biomass, the specific steps are:

[0050] (1) Using hibiscus branches as raw materials, carry out peeling , dried, and mechanically crushed and dried.

[0051] (2) A planetary ball mill is used to perform ball milling pretreatment on the raw materials, and the ball milling time is 15 hours. The material of the ball mill is agate, the capacity is 250mL, the amount of raw materials added is 7.2g, and the number of large, medium and small balls is 5, 30 and 45 respectively. The speed of ball milling is 580r / min, and there is no time interval between forward and reverse rotation; alternately every 90min.

[0052] (3) Add n-butyryl chloride to the ball-milled raw material, the ratio of raw material to n-butyryl chloride is 1:1 (w / w). Ball milling again, the material of the ball milling tank is zirconia, the capacity is 100mL, the number of large, medium and small balls is 0, 40, 60 respectively, the mass ratio o...

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Abstract

The invention discloses an esterification modification method for wood fiber biomasses, comprising the following steps of: firstly, pretreating wood fiber biomasses, i.e. drying and smashing; carrying out pre-ball milling; adding esterification reagent, and continuously carrying out ball milling to carry out an esterification modification reaction; and washing and drying products after the reaction to obtain the esterified modified products of the wood fiber biomasses. According to the method, various wood fiber biomasses are taken as raw materials, wide in source, low in cost, and high in resource utilization rate, and the conventional mode of the single modified cellulose can be changed; and the wood fiber biomasses are esterified in the process of ball milling, the esterification reaction can be carried out within a dissolved homogeneous system or a heterogeneous system in which the solvent is dispersion medium, and the esterification modification method is simple in modifying technology, environment-friendly, and free from the generation of 'the three wastes', and does not need recover the solvent. The infrared and weighing method result shows that the product is good in esterification effect, very good in practical applicability, and better in economic prospect.

Description

technical field [0001] The invention belongs to the field of reuse of lignocellulosic biomass resources, and in particular relates to an esterification modification method of lignocellulosic biomass. Background technique [0002] In recent years, as the total amount of non-renewable fossil resources such as petroleum and coal has been decreasing, the importance of biological renewable resources has become increasingly significant. In the agriculture and forestry industry, there are abundant and cheap lignocellulosic raw materials, including wood waste, straw, rice husk, corn cob, peanut shell, bagasse, etc. At present, the use of lignocellulosic biomass to prepare materials mainly includes the separate utilization of its different components and the utilization of all components. Single-component utilization mainly utilizes the cellulose in it, and the resource utilization rate is very low, which not only causes the loss of other components, but also brings about environmen...

Claims

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Application Information

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IPC IPC(8): C08H8/00
Inventor 洪建国苏萌陈健强叶菊娣李小保高勤卫翟姝瑾
Owner NANJING FORESTRY UNIV
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