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Separation method for agriculture and forestry biomass components

A separation method and biomass technology, applied in the field of agricultural and forestry biomass, can solve problems such as no research report on ionic liquid separation, and achieve the effects of high yield, high efficiency and simple operation.

Active Publication Date: 2011-06-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there are no related research reports on the use of ionic liquids for the separation of agricultural and forestry biomass components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The agricultural and forestry biomass in this example uses wheat stalks, and the specific separation process is as follows:

[0035] Step 1. Dry the wheat stalks and cut them into small pieces, grind them, take the part between 20 mesh and 60 mesh sieves, put them in an oven at 50°C to keep the air circulating and dry for 16 hours, and then use an oscillating ball mill to mill for 48 hours;

[0036] Step 2. Place the wheat stalk powder obtained by ball milling into ionic liquid (1-butyl-3-methylimidazole hydrochloride), and stir for 3 hours at 130° C. under nitrogen protection until the wheat stalk powder is completely dissolved to obtain Wheat straw solution;

[0037] Step 3. The gained wheat stalk solution prepared in step 2 is slowly poured into the acetone / water mixed solution (V 丙酮 :V 水 =9:1), filter to obtain filtrate one and residue one; the volume ratio of wheat straw solution and acetone / water mixed solution is 1:10;

[0038] Step 4. The obtained filtrate pr...

Embodiment 2

[0045] The agricultural and forestry biomass of the present embodiment adopts bagasse, and its specific separation process is as follows:

[0046] Step 1. Dry the bagasse and cut it into small pieces, grind it, take the part between 20 mesh and 60 mesh sieve, put it in an oven at 50°C to keep air circulation and dry for 16 hours, and then use an oscillating ball mill to mill for 72 hours;

[0047] Step 2. Put the bagasse powder obtained by ball milling into ionic liquid (1-allyl-3-methylimidazole hydrochloride), and stir for 6 hours at 70°C under nitrogen protection until the bagasse powder is completely dissolved to obtain bagasse solution;

[0048] Step 3. The gained bagasse solution prepared in step 2 is slowly poured into the acetone / water mixed solution (V 丙酮 :V 水 =1:1), filter to obtain filtrate one and residue one; the volume ratio of bagasse solution and acetone / water mixed solution is 1:3;

[0049] Step 4. The filtrate prepared in step 3 is rotary evaporated to rec...

Embodiment 3

[0056] The agricultural and forestry biomass of this embodiment adopts rice straw, and its specific separation process is as follows:

[0057] Step 1. Dry the straw and cut it into small pieces, grind it, take the part between 20 mesh and 60 mesh sieve, put it in an oven at 50°C to keep air circulation and dry for 16 hours, and then use an oscillating ball mill to mill for 36 hours;

[0058] Step 2. Place the rice straw powder obtained by ball milling in ionic liquid (1-ethyl-3-methylimidazole acetate), and stir for 5 hours at 90° C. under nitrogen protection until the rice straw powder is completely dissolved to obtain Straw straw solution;

[0059] Step 3. slowly pour the acetone / water mixed solution (V 丙酮 :V 水 =4:1), filter to obtain filtrate one and residue one; the volume ratio of rice straw solution and acetone / water mixed solution is 1:20;

[0060] Step 4. The obtained filtrate prepared in step 3 is rotary evaporated to recover acetone, the obtained concentrated solu...

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PUM

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Abstract

The invention discloses a separation method for agriculture and forestry biomass components. The separation method is to obtain cellulose, hemicelluloses and lignin, which have relatively complete molecular structure, by separating the agriculture and forestry biomass components step by step with a precipitator after cell walls dissolve completely. In the separation process, the operation is simple, the efficiency is high, the yields of the separated components are high, the used solvent and ionic liquid can be recovered and reused, and cost is saved. The separation method can provide a reliable theoretical basis for producing new industrial materials and biomass chemical products by using agriculture and forestry biomass as the raw material and provide a technical support for the development and utilization of renewable resources such as the agriculture and forestry biomass.

Description

technical field [0001] The invention relates to the technical field of agricultural and forestry biomass, in particular to the component separation technology of agricultural and forestry biomass, in particular to a method for separating components of agricultural and forestry biomass by using ionic liquid. Background technique [0002] With the increasingly severe energy and environmental issues, the use of renewable raw materials and non-toxic solvents has become an inevitable trend to achieve sustainable industrial and agricultural development. Agricultural and forestry biomass represented by wood fiber has many advantages such as large quantity and low price, biodegradable, renewable, and environmental friendliness, and is attracting more and more attention. [0003] The main components of agricultural and forestry biomass are cellulose, hemicellulose and lignin, and the content of the three accounts for more than 90% of the total amount of agricultural and forestry biom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00D21C5/00C08B37/14
CPCY02P20/542Y02P20/54
Inventor 刘传富蓝武孙润仓
Owner SOUTH CHINA UNIV OF TECH
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