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Intensive processing method for stalk articles or agricultural castoff

A technology of agricultural and forestry wastes and substances, applied in the field of biochemical industry, can solve the problem of high cost

Inactive Publication Date: 2009-07-29
ZHENGZHOU DAYANG GREASE CHEM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both methods are more costly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The raw material is corn stalks, and the specific steps are as follows:

[0022] (1) Firstly, the corn stalks are cleaned, crushed into small particle segments, put into a hydrolysis pot and soaked in 70°C hot water for 3 hours, and the soaking water is used in the subsequent process to adjust the concentration of the sugar solution; Hydrochloric acid, the amount of hydrochloric acid added is 9 times the weight of the treated corn stalks, and hot steam at 102 ° C is passed through for 8 hours to hydrolyze the hemicellulose in the corn stalks to convert them into pentose sugars and exist in the hydrolyzate, and the hydrolyzate is released. The released hydrolyzate is concentrated and crystallized to produce xylose or high-pressure evaporation and dehydration to produce furfural; after the hydrolyzate is released, add hot steam with a pressure of 10Mpa to the hydrolysis pot, keep the pressure for 10 minutes, and open the discharge valve instantly to remove the hydrolyzed s...

Embodiment 2

[0026] The raw material adopts corn cob, and the specific steps are:

[0027] (1) Clean the cobs first, crush them into small particles with a diameter or length of less than 20 mm, put them into a hydrolysis pot and soak them in hot water at 82°C for 2.5 hours, and use the soaking water to adjust the concentration of the sugar solution in the subsequent process; then add The concentration of oxalic acid is 10% by mass, and the amount of oxalic acid added is twice the weight of the treated corn cob, and it is hydrolyzed with hot steam at 110°C for 7 hours, so that the hemicellulose in the corn cob is hydrolyzed into pentose sugar and exists in the hydrolyzed In the liquid, the hydrolyzate is released, and the released hydrolyzate is concentrated and crystallized to produce xylose or high-pressure evaporation and dehydration to produce furfural; after the hydrolyzate is released, add hot steam with a pressure of 12Mpa into the hydrolysis pot, keep the pressure for 8 minutes, and...

Embodiment 3

[0031] The raw materials are peanut shells and cottonseed shells, and the specific steps are:

[0032] (1) Clean the peanut shells and cottonseed shells first, crush them into small particles with a diameter or length less than 20 mm, put them in a hydrolysis pot and soak them in hot water at 91°C for 2 hours, and use the soaking water to adjust the concentration of the sugar solution in the subsequent process Then add the potassium dihydrogen phosphate solution with a concentration of 0.3% by mass percentage, the addition of the potassium dihydrogen phosphate solution is 10 times of the total weight of the processed peanut hulls and cottonseed hulls, and feed 120 ℃ of hot steam for 5 hours to make it The hemicellulose in peanut shells and cottonseed shells is hydrolyzed into pentose sugars and exists in the hydrolyzate, the hydrolyzate is released, and the released hydrolyzate is concentrated and crystallized to produce xylose or high-pressure evaporation and dehydration to pr...

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Abstract

The invention provides a method for intensive processing of straw-type materials or wastes of agriculture and forestry. The method has the following steps: the straw-type materials or the wastes of agriculture and forestry are first ground and then soaked in hot water; hydrolyzation is carried out by diluted acid or monopotassium phosphate solution, the hydrolyzate is used for producing furfural or xylose, solid content after the hydrolyzation is washed and added with alkali substances for neutralization, then cellulase and feruloyl esterase are added to synergetically hydrolyze cellulose in solid content, the cellulose is broken down into 6-carbon monosaccharide and exists in sugar liquor; adsorption filtration is carried out on the sugar liquor by activated carbon, then high-temperature sterilization and cooling are carried out on the sugar liquor before inoculation of fermentation strain to produce acetone, butanol and ethanol by fermentation; the method of the invention maximizes the application of the straw-type materials or the wastes of agriculture and forestry, thus turning existing wastes into the valuables while finding new raw material sources and a new method for producing acetone, butanol and ethanol and bringing more economic and social benefits 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 intensive processing of straw materials or agricultural and forestry wastes. Background technique [0002] Straw materials and agricultural and forestry wastes are a large number of renewable resources, and agricultural and forestry wastes include leaves, branches and sawdust after wood processing. At least 800 million tons of straw materials are harvested in my country every year, and there are about 2.3 billion tons in the world. At present, although a part of straw materials and agricultural and forestry wastes are used for power generation, some are used as fuel, and some are used as raw materials for the production of furfural and xylose, etc., most of them are still not fully utilized, and there is still a waste of resources. [0003] Straw materials and agricultural and forestry wastes are mainly composed of three elements: hemicellulose, cellulose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/28C12P7/16C12P7/10C12R1/145C12R1/01
CPCY02E50/16Y02E50/10
Inventor 王建设王绍鹏
Owner ZHENGZHOU DAYANG GREASE CHEM EQUIP
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