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Method for separating bagasse cellulose from lignin

A cellulose and lignin technology, which is applied in fiber raw material processing, textiles and papermaking, etc., can solve the problems of difficult enzymatic hydrolysis of bagasse fiber, and achieve the effects of improving enzymatic degradation efficiency, accessibility, and enzymatic hydrolysis efficiency

Inactive Publication Date: 2011-10-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The enzymatic hydrolysis efficiency of the isolated bagasse cellulose is greatly improved compared with untreated bagasse, thus solving the problem of difficult enzymatic hydrolysis of bagasse fibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]After the bagasse was exposed to the sun, it was placed in a Bailey micro-powder machine for mechanical pulverization for 30 minutes, and the obtained bagasse fine powder passed through 2.0 mm and 0.5 mm sieves in sequence, sealed in a sample bag, and stored in a dry place at room temperature; take the dried bagasse powder 100 g, placed in a Soxhlet extractor for dewaxing, using toluene-ethanol (2:1, v / v) as a solvent, extracting at 50°C for 4 h, then taking out the bagasse, and air-drying at 50°C for 16 h; add 800 mL of water to the dewaxed bagasse, place it in a water bath at 60°C for 4 h, filter, separate and take the filter residue to obtain hemicellulose-removed bagasse; weigh the ionic liquid 1-ethyl-3-methylimidazole acetic acid For salt, add 10 g of ionic liquid per 1 g of dehemicellulose bagasse, dry in vacuum at 60°C and 20 mbar for 48 h, then put it into a glass vial, add hemicellulose bagasse, and vortex for 2 min to make the bagasse Mix evenly with the ionic...

Embodiment 2

[0037] 1 kg of bagasse from decane pith was blast-dried at 70°C for 12 hours, with a moisture content of 0.3%, and placed in a Bailey micronizer for mechanical pulverization for 20 minutes to obtain bagasse fine powder which was passed through sieves of 2.0 mm and 0.5 mm in turn. Seal it in a sample bag and store it in a dry place at room temperature; take 100 g of dried bagasse powder, put it in a Soxhlet extractor for dewaxing, use toluene-ethanol (2:1, v / v) as solvent, and store it at 55°C Extract for 5 h, then take out the bagasse, and blow dry at 60°C for 12 h; add 800 mL of water to the dewaxed bagasse, place it in a water bath at 65°C for 2 h, filter, separate and take the filter residue to obtain dehemicellulose Bagasse; Weigh the ionic liquid 1-ethyl-3-methylimidazolium acetate, and add 20 g of ionic liquid for every 1 g of dehemicellulose bagasse, dry in vacuum at 70°C and 24 mbar for 30 h, then put into a glass vial, add dehemicellulose bagasse, vortex for 3 minutes...

Embodiment 3

[0039] Bagasse was dried for 12 h with a moisture content of 0.3%. Take 1 kg of bagasse and dry it at 60°C for 8 h, then put it in a Bailey micro-powder machine and grind it mechanically for 20 min. , sealed in a sample bag, and stored in a dry place at room temperature; take 100 g of dried bagasse powder, put it in a Soxhlet extractor for dewaxing, use toluene-ethanol (2:1, v / v) as solvent, 60°C Extraction at low temperature for 6 h, then take out the bagasse, and air-dry at 60°C for 12 h; add 800 mL of water to the dewaxed bagasse, put it in a water bath at 80°C for 2 h, filter, separate and take the filter residue to obtain dehemicellulose bagasse; weigh the ionic liquid 1-butyl-3-methylimidazolium chloride, and add 10 g of ionic liquid per 1 g of dehemicellulose bagasse, dry in vacuum at 80°C for 24 h at 24 mbar, and then put Into a glass vial, add dehemicellulose bagasse, vortex for 2 min to mix bagasse and ionic liquid evenly, then insert the ultrasonic probe under the i...

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PUM

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Abstract

The invention relates to a method for separating bagasse cellulose from lignin, and the method comprises the following steps: fully drying bagasse, performing mechanical grinding, using soxhlet extraction to remove cane wax, further removing hemicellulose through a hot water bath, mixing the bagasse subjected to hemicellulose removal with an ionic liquid, performing ultrasonic treatment for 3-5 minutes to dissolve the lignin in the bagasse in the ionic liquid, adding alkali for dilution, and then separating out the bagasse cellulose subjected to lignin removal by virtue of filtering; regulating the pH value of the dissolved lignin 2-3 times for precipitation, and separating out the lignin by virtue of centrifugal separation; and recovering the ionic liquid through the methods of neutralization, organic solvent extraction and vacuum concentration. The enzymatic degradation capability of the obtained bagasse cellulose is greatly improved compared with that of the bagasse which is not separated.

Description

technical field [0001] The invention relates to a method for separating sugar cane bagasse into cellulose and lignin. Compared with unseparated bagasse, the enzymatic degradation ability of the obtained bagasse cellulose is greatly improved. Background technique [0002] More and more countries, especially developed countries, have listed the transformation and utilization of agricultural and forestry waste and other renewable resources into an important strategy for sustainable social and economic development. The effective use of agricultural and forestry waste biomass has become the focus of sustainable development of human beings today. one. In my country, bagasse is an important agricultural waste resource. Sugarcane is planted in many provinces such as Hainan, Guangdong, Guangxi, Fujian, and Yunnan. Each sugar factory has a large amount of bagasse in stock, and 2 Ton of bagasse, my country produced 176.86 million tons of bagasse in 2005. Compared with other agricultur...

Claims

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Application Information

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IPC IPC(8): D21C5/00C08H7/00
Inventor 王兆梅郑翠李琳魏东
Owner SOUTH CHINA UNIV OF TECH
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