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Method for preparing microcrystalline cellulose and cellulose fuel ethanol by separating furfural residue

A technology of microcrystalline cellulose and cellulosic ethanol, which is applied in the directions of biochemical equipment and methods, microorganism-based methods, and fiber raw material processing, etc., can solve the problem of high cost, achieve short action time, reduce production cost, and high product yield Effect

Inactive Publication Date: 2009-04-22
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production of microcrystalline cellulose in my country mainly uses cotton and wood pulp as raw materials, and the cost is relatively high.

Method used

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  • Method for preparing microcrystalline cellulose and cellulose fuel ethanol by separating furfural residue
  • Method for preparing microcrystalline cellulose and cellulose fuel ethanol by separating furfural residue
  • Method for preparing microcrystalline cellulose and cellulose fuel ethanol by separating furfural residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The aqueous solution of furfural slag with a mass concentration of 10% is desanded through a cyclone desander, and the feed pressure is 0.45 MPa.

[0034] Using ethanol solution with a mass concentration of 55% as the extraction solvent, ultrasonic extraction method is used for lignin extraction and separation. The ratio is 15:1; the extraction temperature is 120°C, and the extraction cycle time is 50min.

[0035] The extracted material was filtered, the filtrate was distilled under reduced pressure at 50°C to recover ethanol, and the distillation residue was vacuum-dried at 50°C to obtain a lignin product with a product yield of 34.7%;

[0036] Add the endoglucanase / (g cellulose) of 12 international units and the β-glucosidase / (g cellulose) of 10 international units in the raffinate residue and pack into enzymolysis reactor, the substrate quality The concentration is 6%, the enzymolysis reaction temperature is 45° C., the enzymolysis reaction pH value is 4.5, and the ...

Embodiment 2

[0041] The aqueous solution of furfural slag with a mass concentration of 10% is desanded through a cyclone desander, and the feed pressure is 5kgf / cm 2 .

[0042] Using ethanol as solvent, lignin is extracted and separated by ultrasonic extraction method. The ultrasonic frequency is 30khz, the ultrasonic power is 280W, the interval of ultrasonic action is 5min, and each action time is 3min; The mass ratio is 20:1; the extraction temperature is 70°C, and the extraction cycle time is 130min.

[0043] The extracted material was filtered, the filtrate was distilled under reduced pressure at 50°C to recover ethanol, and the distillation residue was vacuum-dried at 50°C to obtain a lignin product with a product yield of 31.6%.

[0044] Add the endoglucanase / (g cellulose) of 12 international units and the β-glucosidase / (g cellulose) of 10 international units in the raffinate residue and pack into enzymolysis reactor, the substrate quality The concentration is 10%, the enzymolysis ...

Embodiment 3

[0049] The aqueous solution of furfural slag with a mass concentration of 10% is desanded through a cyclone desander, and the feed pressure is 4.8kgf / cm 2 .

[0050] Use ethanol as solvent to extract and separate lignin by ultrasonic extraction method, ultrasonic frequency 40khz, ultrasonic power 200W, ultrasonic action interval 8min, each action time 4min; the mass concentration of the ethanol solution of the extract is 75%, the ethanol solution and furfural residue The mass ratio is 7:1; the extraction temperature is 100°C, and the extraction cycle time is 90 minutes.

[0051] The extracted material was filtered, the filtrate was distilled under reduced pressure at 60°C to recover ethanol, and the distillation residue was vacuum-dried at 55°C to obtain a lignin product with a yield of 33.2%.

[0052] Add the endoglucanase / (g cellulose) of 12 international units and the β-glucosidase / (g cellulose) of 10 international units in the raffinate residue and pack into enzymolysis r...

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Abstract

The invention relates to a method for preparing microcrystalline cellulose and fiber ethanol by separating furfural residues, which comprises the following steps: (1) ethanol is taken as a solvent, a circulating ultrasonic extraction method is adopted to extract, and lignin is separated from an extraction liquid; (2) extraction residues adopt complex enzyme of endoglucanase and beta-glucosaccharase for enzyme-catalyzed hydrolysis, and a hydrolysate is fermented to prepare the ethanol; and (3) hydrolysis residues are subjected to acid-catalyzed hydrolysis to separate the microcrystalline cellulose. The extraction method has the advantages that the extraction method is green and environment-friendly, the enzyme-catalyzed hydrolysis has mild conditions, the side effect is small, the acid concentration needed by acid hydrolysis is low, the action time is short, and the yield of each step is high; and the method has smart process combination, can greatly reduce the production cost for the microcrystalline cellulose and the fiber ethanol by utilizing a special structure of furfural waste residues, and has double benefits of economization and environmental protection.

Description

technical field [0001] The invention relates to the field of biomass chemistry and chemical industry, in particular to a method for comprehensively utilizing furfural slag to separate and prepare microcrystalline cellulose and fiber ethanol. Background technique [0002] Furfural is an important chemical raw material. my country is one of the major producers and exporters of furfural. There are more than 100 production plants in 15 provinces and cities including North China, Northeast China and East China, among which Shanxi, Hebei, Shandong and other provinces have the most furfural factories. [0003] Furfural is mainly made of agricultural and sideline product leftovers. Generally, the plant raw materials are steamed and hydrolyzed, and the pentosans in the plant raw materials are used to prepare furfural. Therefore, various plant raw materials with high pentosan content are ideal raw materials for furfural production. In the production process of furfural, a large amo...

Claims

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Application Information

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IPC IPC(8): C12P7/08D21C5/00C12R1/865
Inventor 蒋建新冯月王堃孙润仓孙亚东朱莉伟
Owner BEIJING FORESTRY UNIVERSITY
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