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Method for applying peanut shells to synchronously prepare nanocellulose crystal and sugar

A technology of nanocellulose and peanut shells, applied in fermentation and other directions, can solve the problems of large consumption of water and power resources, large waste acid and impurities, achieve economic and social benefits improvement, mild process conditions, and improve comprehensive utilization value. Effect

Active Publication Date: 2013-04-10
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the common preparation method of nanocellulose crystals is inorganic acid hydrolysis, which produces a large amount of waste acid and impurities, and consumes a large amount of water and power resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 24g powdered peanut shell solid powder, add 4% H at a solid-to-liquid ratio of 1:15 2 o 2 Solution 300ml and 8% NaOH solution 60ml (V H2O2 :V NaOH 5:1), heated and stirred in a 40°C water bath for 2.0h, and cooled. The cooled suspension was centrifuged at 3000r / min for 20min, the supernatant was discarded, the precipitate was washed until neutral, dried in a drying oven at 105°C, pulverized, passed through a 100-mesh sieve, and sealed for storage. Dissolve 8 g of the extracted peanut shell cellulose powder, and process ultrasonic treatment at 45°C for 3 h at an ultrasonic frequency of 40 kHz and a power of 250 W. Finally, the peanut shell cellulose solution was mixed with 30ml of acetic acid-sodium acetate buffer solution, and mixed evenly with the cellulase solution at a ratio of 1:6, and placed in a constant temperature oscillation box for enzymolysis, and the enzymolysis temperature was 45°C. The enzymatic hydrolysis time is 3 days. After the reaction, the...

Embodiment 2

[0020] Weigh 48g powdered peanut shell solid powder, add 4% H 2 o 2 Solution 300ml and 8% NaOH solution 60ml (V H2O2 :V NaOH 5:1), heated and stirred in a 40°C water bath for 2.0h, and cooled. The cooled suspension was centrifuged at 3000r / min for 20min, the supernatant was discarded, the precipitate was washed until neutral, dried in a drying oven at 105°C, pulverized, passed through a 100-mesh sieve, and sealed for storage. The extracted 16g peanut shell cellulose powder was dissolved, and ultrasonically treated at 45°C for 3h at an ultrasonic frequency of 40 kHz and a power of 250 W. Finally, the peanut shell cellulose solution was mixed with 30ml of acetic acid-sodium acetate buffer solution, and mixed evenly with the cellulase solution at a ratio of 1:6, and placed in a constant temperature oscillation box for enzymolysis, and the enzymolysis temperature was 45°C. The enzymatic hydrolysis time is 3 days. After the reaction, the mixed solution of peanut shell nanocell...

Embodiment 3

[0022] Weigh 96g of powdery peanut shell solid powder, add 4% H at a solid-to-liquid ratio of 1:15 2 o 2 Solution 300ml and 8% NaOH solution 60ml (V H2O2 :V NaOH 5:1), heated and stirred in a 40°C water bath for 2.0h, and cooled. The cooled suspension was centrifuged at 3000r / min for 20min, the supernatant was discarded, the precipitate was washed until neutral, dried in a drying oven at 105°C, pulverized, passed through a 100-mesh sieve, and sealed for storage. The extracted 32g peanut shell cellulose powder was dissolved and ultrasonically treated at 45°C for 3h at an ultrasonic frequency of 40 kHz and a power of 250 W. Finally, the peanut shell cellulose solution was mixed with 30ml of acetic acid-sodium acetate buffer solution, and mixed evenly with the cellulase solution at a ratio of 1:6, and placed in a constant temperature oscillation box for enzymolysis, and the enzymolysis temperature was 45°C. The enzymatic hydrolysis time is 3 days. After the reaction, the mix...

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Abstract

The invention discloses a method for applying peanut shells to synchronously prepare nanocellulose crystal and sugar. The method uses the peanut shells as a raw material to extract cellulose, adopts an enzymatic hydrolysis method to prepare the nanocellulose crystal, controls the enzymolysis degree and obtains sugar liquor at the same time, belonging to the technical field of nanostructure materials. The nanocellulose crystal preparation method does not adopt an inorganic acid hydrolysis method generating a lot of waste acid and impurities but adopts the cellulose enzymatic hydrolysis method with mild process conditions and strong specificity, being green and environmentally-friendly and conforming to the national strategy of sustainable development requirements. The method uses the peanut shells as the raw material to replace high-cost raw materials such as cotton, chemical pulp or microcrystalline cellulose and the like, so that the comprehensive utilization value of the peanut shells is increase, the current situations of waste of resources and economic losses as most of the agricultural and sideline products are used as wastes or fuels are changed, and the economic and social benefits are brought while the environment is improved. A lot of sugar liquor is produced during preparation, and the purpose of making the most of things is achieved.

Description

technical field [0001] The invention relates to a method for synchronously preparing nano-cellulose crystals and sugar, in particular to a method for preparing nano-cellulose crystals and simultaneously producing sugar by using peanut shells as raw materials and using an enzymatic hydrolysis method. Background technique [0002] my country's peanut production accounts for about 1 / 3 of the world's total production, and the peanut shells produced during the processing of peanuts alone are about 4.5 million tons per year. The main components of peanut shells include 65.7%-79.3% crude cellulose, 10.6%-21.2% carbohydrates, 4%-7% protein, 1.9%-4.6% ash, 1%-2% crude fat, 0.7% starch, etc. In addition, peanut shells also contain some medicinal ingredients such as carotene, saponin, and β-sitosterol. Some important chemical raw materials such as glucose, furfural and ethyl formate can be extracted from peanut shells after proper treatment. At present, except a small amount of peanu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/04
Inventor 孙庆杰熊柳吴旻
Owner QINGDAO AGRI UNIV
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