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Method for extracting pentose through plant hemicellulose hydrolysis

A technology of hemicellulose and plants, which is applied in the field of high-efficiency hydrolysis of plant hemicellulose to obtain pentose sugar solution, which can solve the problems of unsatisfactory hydrolysis effect, consumption of chemicals and raw materials, waste of resources, etc., and is beneficial to resource utilization and hydrolysis Good effect, highly selective effect

Inactive Publication Date: 2017-02-08
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Xiang Wei et al. made a solid acid-catalyzed hydrolysis of corn stalk hemicellulose. Under the conditions of solid-solid ratio 1:1, liquid-solid ratio 15:1, reaction temperature 100°C, and reaction time 10 h, the yield of hemicellulose hydrolysis reached 93.8% (Xiang Wei, et al. Basic kinetics of solid acid-catalyzed hydrolysis of hemicellulose[J]. Anhui Agricultural Science, 2011, 39(20):12560-12561, 12580.), however, the Solid acid has not yet reported its structure and preparation method
[0006] In the current research literature and patents, there are many types of acids that catalyze the hydrolysis of plant hemicellulose, but generally the yield of pentose sugars in the hydrolyzate is not too high, the hydrolysis effect is not ideal, and more chemical resources will be consumed in industrial production. Products and raw materials, resulting in a certain waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh bamboo chips with an absolute dry weight of 2.4 g and a mesh number of 20 to 80 in a 250 mL ground conical flask, and add 0.3 mol / L according to the liquid-solid ratio of 60:1 (volume-to-mass ratio, in mL / g). The maleic acid solution was placed in a constant-temperature heating magnetic stirrer at 140 °C, and the magnetic stirring and condensing device was turned on, and the reaction was carried out for 8 h. After the hydrolysis reaction was completed, the conical flask was cooled to room temperature, filtered with a Buchner funnel, and the hydrolysis residue was washed with deionized water until neutral, and the obtained filtrate was the bamboo shavings hemicellulose hydrolyzate.

[0018] The content of pentose polysaccharide in the bamboo chips is 20.13% according to the national standard GB / T2677.9-1994, and the content of pentose sugars in the hemicellulose hydrolyzed solution is tested by the phloroglucinol method to be 0.413 g, and the pentose sugar content i...

Embodiment 2

[0024] Weigh bamboo chips with an absolute dry weight of 2.4 g and a mesh number between 20 and 80 into a 250 mL ground conical flask, and add 0.5 mol / L at a liquid-solid ratio of 50:1 (volume-to-mass ratio, in mL / g). The maleic acid solution was placed in a constant temperature heating magnetic stirrer at 150 °C, and the magnetic stirring and condensation device was turned on, and the reaction was carried out for 9 h. After the hydrolysis reaction was completed, the conical flask was cooled to room temperature, filtered with a Buchner funnel, and the hydrolysis residue was washed with deionized water until neutral, and the obtained filtrate was the bamboo shavings hemicellulose hydrolyzate.

[0025] The content of pentose polysaccharides in the bamboo chips is 20.13% according to the national standard GB / T2677.9-1994, and the content of pentoses in the hemicellulose hydrolyzate is 0.473 g tested by the phloroglucinol method. The pentose yield was calculated according to the f...

Embodiment 3

[0031] Weigh bamboo chips with an absolute dry weight of 2.4 g and a mesh number of 20 to 80 into a 250 mL ground conical flask, and add 0.1 mol / L according to the liquid-solid ratio of 40:1 (volume-to-mass ratio, in mL / g). The maleic acid solution was placed in a constant temperature heating magnetic stirrer at 130 °C, the magnetic stirring and condensation device were turned on, and the reaction was carried out for 7 h. After the hydrolysis reaction was completed, the conical flask was cooled to room temperature, filtered with a Buchner funnel, and the hydrolysis residue was washed with deionized water until neutral, and the obtained filtrate was the bamboo shavings hemicellulose hydrolyzate.

[0032]According to the national standard GB / T2677.9-1994, the content of pentoose in bamboo chips is 20.13%, and the content of pentose in hemicellulose hydrolyzate is 0.377 g by phloroglucinol method. The pentose yield was calculated according to the following formula. The hydrolyze...

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Abstract

A method for extracting pentose through plant hemicellulose hydrolysis comprises the following steps: placing a plant raw material in a reaction container, and adding a maleic acid solution; placing the reaction container (Erlenmeyer flask) in a 100-160 DEG C constant temperature heating magnetic stirrer, starting a magnetic stirring and condensing device, and carrying out a reaction for 2-14 h; and rapidly cooling the Erlenmeyer flask after the hydrolysis reaction ends, and filtering the obtained solution by a Buchner funnel to obtain a filtrate which is plant hemicellulose hydrolysate, and repeatedly washing obtained residues until the residues are neutral. Hemicelluloses in the plant raw material is hydrolyzed by maleic acid to extract pentose, the maleic acid is cheap and easily available and has a good hydrolysis effect on hemicelluloses in various raw materials, the pentose yield under optimum conditions can reach 98% or above, and recycling of all components in the plant raw material is facilitated.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for obtaining a pentose solution by efficient hydrolysis of plant hemicellulose. Background technique [0002] With the continuous development of the world economy, the continuous growth of the population and the massive consumption of petrochemical resources, problems such as energy shortage and environmental degradation have become increasingly prominent and intensified. Biomass resources are abundant renewable resources on the earth, with the advantages of wide sources, low cost, clean and renewable, and the research on the transformation of biomass to produce biomass energy has received extensive attention. [0003] Lignocellulosic biomass is mainly composed of cellulose, hemicellulose and lignin, of which the content of hemicellulose accounts for about 20-35%. Hemicellulose can be used as cholesterol inhibitor, tablet dispersant, sedative, etc. It can be hydrolyz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13K13/00
CPCC13K13/00C13K13/002
Inventor 林艳房桂干邓拥军沈葵忠韩善明李红斌焦健田庆文梁龙
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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