Method for producing xylose coupled cogeneration of propanone, butanol and ethanol using stalk

A straw and xylose technology, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problem of high cost

Inactive Publication Date: 2009-02-04
ZHENGZHOU DAYANG GREASE CHEM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of the method of producing acetone and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: After crushing corncobs, soak them in hot water at 90°C for 1 hour, then add dilute sulfuric acid with a mass percentage concentration of 0.3% for hydrolysis, the amount of dilute sulfuric acid added is 8 times the weight of corncobs, and the temperature during hydrolysis is 100°C , the pressure during hydrolysis is 0.1MPa, the hydrolysis time is 8 hours, and the filtration is divided into xylose hydrolyzate and xylose residue. The xylose hydrolyzate is evaporated, decolorized, filtered, ion exchanged, concentrated and crystallized to produce xylose; Add hot water at 35°C to the residue, the weight ratio of xylose residue to hot water is 1:6, add calcium hydroxide to adjust the pH value to 4, then add cellulase in batches, add 200ncu of cellulose per gram of xylose residue Enzyme, and then sent to the enzymolysis generator for continuous enzymolysis at 40°C for 120 hours; after enzymolysis, membrane separation and filtration is divided into decomposition liqui...

Embodiment 2

[0017] Example 2: After mixing and pulverizing corn stalks, wheat stalks and sorghum stalks, soak them in 80°C hot water for 2 hours, then add dilute hydrochloric acid with a mass percentage concentration of 3% for hydrolysis. 7 times the total weight of sorghum stalks, the temperature during hydrolysis is 120°C, the pressure during hydrolysis is 0.2MPa, and the hydrolysis time is 5 hours. After filtration, it is divided into xylose hydrolyzate and xylose residue. The xylose hydrolyzate is evaporated, decolorized, and filtered , ion exchange, concentration and crystallization to produce xylose; add hot water at 45°C to the xylose residue, the weight ratio of xylose residue to hot water is 1:5.5, add calcium carbonate to adjust the pH value to 5, and then add in batches Cellulase, add 400ncu cellulase per gram of xylose residue, and then send it to the enzymolysis generator for continuous enzymolysis at 50°C for 90 hours; after enzymolysis, membrane separation and filtration are...

Embodiment 3

[0018] Example 3: Mix and pulverize peanut shells and cottonseed shells and soak them in hot water at 60°C for 3 hours, then add dilute sulfuric acid with a mass percent concentration of 6% for hydrolysis, and the amount of dilute sulfuric acid added is 5% of the total weight of peanut shells and cottonseed shells. times, the temperature during hydrolysis is 130°C, the pressure during hydrolysis is 0.3MPa, and the hydrolysis time is 3 hours. After filtration, it is divided into xylose hydrolyzate and xylose residue. The xylose hydrolyzate is evaporated, decolorized, filtered, ion exchanged, concentrated and Crystallization to produce xylose; add hot water at 60°C to xylose residue, the weight ratio of xylose residue to hot water is 1:3, add sodium hydroxide to adjust the pH value to 7, then add cellulase in batches, Add 500ncu of cellulase to the xylose residue, and then send it to the enzymolysis generator for continuous enzymolysis at 55°C for 60 hours; after enzymolysis, mem...

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PUM

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Abstract

The invention provides a method for producing xylose co-produced with acetone, butanol and ethanol by utilizing straws. The straws are hydrated by acid to be filtered to be divided into xylose hydrolysis fluid and xylose residue; the xylose residue is zymohydrolyzed, fermented and rectified to prepare the acetone, the butanol and the ethanol; the xylose hydrolysis fluid is used for preparing the xylose. The method of producing xylose co-produced with acetone, butanol and ethanol by utilizing straws of the invention realizes the maximization of the cellulose straw substances, not only the straw resources are fully utilized to realize changing waste into valuable and the added value of products is improved to realize the economic value of the straws, but also the new raw material source and methods for the production of the acetone and the ethanol are developed and more economic benefits and social benefits are brought to the enterprises and the society.

Description

technical field [0001] The invention belongs to the technical field of biochemical industry, and relates to a method for producing xylose and co-producing acetone, butanol and ethanol by utilizing straw. Background technique [0002] Crop straw is the product of sunlight photosynthesis and is a large amount of renewable resources. In my country alone, about 800 million tons are harvested every year. Except a small part is used as feed, most of the rest are wasted. With the development and progress of technology, the technology of using straw to produce xylose and xylitol has been developed, which has opened up a new way for the reuse of straw. However, there are still some shortcomings in the technology of using straw to produce xylose and xylitol. The liquid part of the straw after acid hydrolysis and filtration is used to produce xylose, but the filtered xylose residue is not fully utilized. Some of them are used to produce ethanol, but the utilization of straw has not be...

Claims

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Application Information

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IPC IPC(8): C12P19/02C12P7/28C12P7/16C12P7/10C12R1/145
CPCY02E50/16Y02E50/10
Inventor 王建设王绍鹏
Owner ZHENGZHOU DAYANG GREASE CHEM EQUIP
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