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Method for improving hydrolytic efficiency of cellulose

A technology of cellulose and efficiency, which is applied in the field of improving the efficiency of cellulose hydrolysis, and can solve the problems affecting the total sugar yield

Active Publication Date: 2014-06-11
高密银鹰新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have two sides. For example, the steam explosion method will produce substances that inhibit enzymatic hydrolysis and fermentation. Alkali treatment can remove part of lignin and also take away part of hemicellulose, affecting the yield of total sugar, etc.

Method used

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  • Method for improving hydrolytic efficiency of cellulose
  • Method for improving hydrolytic efficiency of cellulose
  • Method for improving hydrolytic efficiency of cellulose

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Weigh 4 parts of cyanuric chloride into the reactor, add 40 parts of dichloromethane, and then stir in an ice-water bath; use 30 parts of 2 parts of phenol, 2 parts of anhydrous sodium carbonate and 0.1 part of anhydrous sodium sulfite After the water is dissolved, it is slowly dripped into the above system, and it lasts for 1 hour. Continue to react for 2 hours, stop the reaction, pour it into a separatory funnel, and let it stand for 1 hour. The crude product was obtained from methane, and the crude product was recrystallized from THF-water to obtain a white solid with a yield of 65.5%.

[0030] (2) Weigh 2 parts of cellulose into the reactor, add 10 parts of acetone; weigh the relative molar content (based on glucose ring) of 1 / 40 parts of modifier, and add 30 parts of acetone to dissolve it under stirring, And slowly drop it into the above system; use 10wt% NaOH as a catalyst, react at a temperature of 40°C for 3 hours, the product is filtered by suction and was...

Embodiment 2

[0033] (1) Weigh 2 parts of cyanuric chloride into the reactor, add 20 parts of dichloromethane, and then stir in an ice-water bath; use 30 parts of 1 part of phenol, 1 part of anhydrous sodium carbonate and 0.1 part of anhydrous sodium sulfite After the water is dissolved, it is slowly dripped into the above system, and it lasts for 1 hour. Continue to react for 2 hours, stop the reaction, pour it into a separatory funnel, and let it stand for 1 hour. The crude product was obtained from methane, and the crude product was recrystallized from THF-water to obtain a white solid with a yield of 75.5%.

[0034] (2) Weigh 2 parts of cellulose in the reactor, add 10 parts of acetone; weigh the relative molar content (based on glucose ring) as 1 / 20 modifier, add 30 parts of acetone to dissolve it under stirring, and Slowly drop into the above system; use 10wt% NaOH as a catalyst, react at a temperature of 40°C for 3 hours, the product is filtered by suction and washed with deionized w...

Embodiment 3

[0037] (1) Weigh 1 part of cyanuric chloride into the reactor, add 10 parts of dichloromethane, and then stir in an ice-water bath; use 30 parts of 1 part of phenol, 1 part of anhydrous sodium carbonate and 0.1 part of anhydrous sodium sulfite After the water is dissolved, it is slowly dropped into the above system, and it lasts for 1 hour. Continue to react for 2 hours, stop the reaction, pour it into a separatory funnel, and let it stand for 1 hour. The crude product was obtained from methane, and the crude product was recrystallized with tetrahydrofuran-water to obtain a white solid with a yield of 60.5%.

[0038] (2) Weigh 2 parts of cellulose into the reactor, add 10 parts of acetone; weigh the relative molar content (based on glucose ring) of 1 / 5 parts of modifier, and add 30 parts of acetone to dissolve it under stirring, And slowly drop it into the above system; use 10wt% NaOH as a catalyst, react at a temperature of 40°C for 3 hours, the product is filtered by suction...

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Abstract

The invention relates to a preparation method and an application of a cellulose modifier, particularly to a method for improving the hydrolytic efficiency of cellulose. The cellulose modifier of a triazine derivative is synthesized with cyanuric chloride serving as an active component and phenol, phenol-4-sulfonic acid or H acid monosodium salt serving as a functional component, and the structure of the modifier is presented through infrared spectrum and mass spectrum; and then the synthesized triazine derivative is used for modifying the cellulose and the modified microcrystalline cellulose is hydrolyzed in 8% of H2SO4 at a temperature of 130 DEG C for 5h. The result proves that when the relative mole content (by glucose ring) of the modifier is 16.67%, the yield of reducing sugar through hydrolysis of the cellulose is 23.54% maximally. Modification enables the crystalline structure of the microcrystalline cellulose to change through analysis of a wide angle X-ray diffraction pattern, amorphous regions are added, the crystallographic index is declined, and the grain size is reduced. The method has wide application prospect in hydrolysis of the cellulose.

Description

technical field [0001] The invention relates to a method for improving cellulose hydrolysis efficiency, in particular to a method for improving cellulose hydrolysis efficiency by chemical modification of cellulose. Background technique [0002] Ethanol (commonly known as alcohol) is an important industrial raw material, which is widely used in the fields of chemical industry, food, beverage industry, military industry, daily chemical industry, medicine and health, etc. Kg). Cellulose is one of the polysaccharide resources with the highest content in nature. The conversion of cellulose into ethanol as biomass energy has attracted much attention in the field of fossil energy replacement research. However, the key to converting cellulose into clean fuel and chemical ethanol is to find effective The pathway hydrolyzes cellulose to soluble fermentable sugars such as glucose. Cellulose is a long-chain molecule in which β-D-glucose residues are linked by 1,4-glycosidic bonds. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C13K1/02C13K13/00C08B15/06
Inventor 蒋学田秀枝王树根蒋静翁佛全顾坚黄丹
Owner 高密银鹰新材料股份有限公司
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