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Process for preparing monosaccharide by using cellulose-containing raw material

A cellulose and cellulase technology, applied in the direction of fermentation, can solve the problem of low yield of monosaccharides, and achieve the effect of improving the yield

Active Publication Date: 2008-10-22
COFCO GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the shortcoming of the low yield of monosaccharides in the existing method for preparing monosaccharides from cellulose-containing raw materials, and provide a method for preparing monosaccharides from cellulose-containing raw materials with high yields of monosaccharides

Method used

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  • Process for preparing monosaccharide by using cellulose-containing raw material
  • Process for preparing monosaccharide by using cellulose-containing raw material
  • Process for preparing monosaccharide by using cellulose-containing raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This example illustrates the method of the present invention for preparing monosaccharides from cellulose-containing feedstocks.

[0046] (1) Steam explosion

[0047] test as figure 1 For the corn stalk raw material shown, the water content of the corn stalk measured according to the above-mentioned method is 20% by weight, the raw material is cut into 1.5 cm × 0.2 cm × 0.5 cm segments, and the vertical impregnator (Shandong Wenrui Machinery Co., Ltd. ) mixed with water whose weight is one-third of the weight of the corn stalk raw material, corn stalks with a water content of 40% by weight can be obtained. Take 1000 grams of corn stalks with a water content of 40% by weight, maintain a pressure of 1.6 MPa at 195° C. for 5 minutes, and then release the pressure to complete steam explosion. The resulting steam explosion product and water at 70°C were stirred and mixed for 30 minutes at a weight ratio of 1:3, and then solid-liquid separation was carried out at 900 rpm wi...

Embodiment 2

[0062] This example illustrates the method of the present invention for the preparation of monosaccharides.

[0063] (1) Steam explosion

[0064] Get 1000 grams of corn stalks with a water content of 50% by weight, cut them into small sections of 1.3 cm × 0.4 cm × 0.8 cm, maintain 4 minutes at a pressure of 1.8 MPa at 190 ° C, then release the pressure, complete steam explosion, and obtain 1200 g of steam explosion waste (moisture content 60% by weight).

[0065] According to the method for the steam explosion product of hydrolysis of sulfuric acid hydrolysis by HPLC described in Example 1, record 1200 grams of steam explosion product containing 210 grams of cellulose and 60 grams of hemicellulose.

[0066] (2) Enzymolysis

[0067] Mix the remaining steam explosion product after the sampling test in step (1) with 400 grams of water, adjust the pH value to 6.0, heat to 55°C, add 15 enzyme activity units of cellulase based on the dry weight per gram of straw , and incubated a...

Embodiment 3

[0071] This example illustrates the method of the present invention for the preparation of monosaccharides from cellulose-containing feedstocks.

[0072] (1) Steam explosion

[0073] Take 1000 grams of corn stalks with a water content of 35% by weight, cut them into small sections of 1.2 cm x 0.4 cm x 0.7 cm, maintain a pressure of 1.7 MPa at 200 ° C for 6 minutes, and then release the pressure to complete steam explosion. The resulting steam explosion waste and water at 75°C were stirred and mixed for 50 minutes according to the weight ratio of 1: 2.5, and then solid-liquid separation was carried out at 900 rpm with a LW400 type decanter centrifuge (Zhangjiagang Huada Centrifuge Manufacturing Co., Ltd.) , Obtain 2000 grams of solid steam explosion product (moisture content is 70% by weight) altogether.

[0074] According to the method for the steam explosion waste product of sulfuric acid hydrolysis by HPLC analysis described in Example 1, it is recorded that 2000 grams of s...

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Abstract

The invention provides a method of adopting material containing the cellulose to prepare monosaccharide, the method comprises the steps of exploding the material containing the cellulose via stream and zymohydrolyzing the obtained steam explosion product, wherein the water content of the material containing the cellulose is between thirty and sixty weight percent. According to the method of adopting material containing the cellulose to prepare the monosaccharide, the water content of the material containing the cellulose is strictly controlled around between thirty and sixty weight percent to guarantee that the water of the material containing the cellulose is changed to steam under the condition of steam explosion, the steam dashes out of the material containing the cellulose when pressure is relieved to destroy lignin sheath embedding the cellulose and semi cellulose in the material containing the cellulose thoroughly, so as to increase the proportion of the cellulose which can contact with enzyme in the material containing the cellulose and finally increase the productivity of the monosaccharide.

Description

technical field [0001] The present invention relates to a method for preparing monosaccharides, more particularly, to a method for preparing monosaccharides from cellulose-containing raw materials. Background technique [0002] The existing technology can use cellulose-containing raw materials to prepare monosaccharides, and the obtained monosaccharides are mainly glucose. Glucose can be used in the food and pharmaceutical industries, and can be used as a reducing agent in the printing and dyeing leather industry. Glucose is often used as a reducing agent in the silver process; the obtained monosaccharides also include xylose, which can be hydrogenated to produce xylitol as a non-caloric sweetener for food. The monosaccharides can also be fermented by microorganisms (such as yeast) to produce ethanol. [0003] The cellulose-containing raw materials are generally roots, stems and leaves of plants, including straws. The stalks are the remaining roots, stems and leaves of cro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/02
Inventor 岳国君李春玲袁敬伟刘甲申刘辉林海龙
Owner COFCO GROUP