Method for preparing monosaccharide by raw materials containing cellulose

A technology for cellulose and raw materials, applied in the field of monosaccharide preparation, can solve the problems of low monosaccharide yield and low enzymatic hydrolysis efficiency, and achieve the effects of improved enzymatic hydrolysis efficiency, uniform reaction and stable reaction system

Active Publication Date: 2012-03-21
COFCO GROUP
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to overcome the defects of low monosaccharide yield and low enzymolysis efficiency of monosaccharide prepared by the existing method for preparing monosaccharide from cellulose-containing raw materials, and provide a monosaccharide with high yield and enzymolysis Highly efficient method for preparing monosaccharides from cellulose-containing raw materials

Method used

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  • Method for preparing monosaccharide by raw materials containing cellulose
  • Method for preparing monosaccharide by raw materials containing cellulose
  • Method for preparing monosaccharide by raw materials containing cellulose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] This example is used to illustrate the method of the present invention for preparing monosaccharides from cellulose-containing raw materials.

[0059] (1) Steam explosion

[0060] 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 ...

Embodiment 2

[0076] This example is used to illustrate the method of the present invention for preparing monosaccharides from cellulose-containing raw materials. Monosaccharides were prepared according to the method of Example 1, except that 1000 grams of corn stalks with a moisture content of 50% by weight were cut into small sections of 1.3 cm × 0.4 cm × 0.8 cm, and the Maintain for 4 minutes, then release the pressure, complete the steam explosion, stir and mix the obtained steam explosion product with water at 65°C according to the mass ratio of 1:2 for 40 minutes, then use a centrifugal pump LW400 type decanter centrifuge (manufactured by Zhangjiagang Huada Centrifuge) Co., Ltd.) carried out solid-liquid separation at a rotating speed of 900 rev / min, and obtained 2000 grams of steam explosion waste (moisture content is 75% by weight) in total.

[0077] According to the method for the steam explosion product of sulfuric acid hydrolysis by HPLC analysis described in Example 1, it is rec...

Embodiment 3

[0080] This example is used to illustrate the method of the present invention for preparing monosaccharides from cellulose-containing raw materials.

[0081] Monosaccharides were prepared according to the method of Example 1, except that 1000 grams of corn stalks with a water content of 35% by weight were cut into small sections of 1.2 cm × 0.4 cm × 0.7 cm, and the mixture was heated at 200 ° C under a pressure of 1.7 MPa. Hold for 6 minutes, then release the pressure to complete the steam explosion. Gained steam explosion product and 75 DEG C of water were stirred and mixed for 50 minutes according to the weight ratio of 1: 2.5, and then solidified at 900 rpm with a centrifugal pump LW400 type decanter centrifuge (Zhangjiagang Huada Centrifuge Manufacturing Co., Ltd.). The liquid was separated to obtain a total of 2000 g of solid steam explosion product (water content: 67.5% by weight).

[0082] According to the method for the steam explosion waste product of sulfuric acid h...

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Abstract

A method which uses cellulose-containing raw materials for preparing monosaccharide comprises the steps as follows: the raw materials which contain cellulose is carried out steam blasting; a product which is obtained by steam blasting is mixed with enzyme and then experiences enzymolysis, wherein, the method which leads the steam blasting product to be mixed with the enzyme comprises: firstly, a first batch of steam blasting products are mixed with the enzyme for obtaining a mixture; and then the remaining steam blasting products are continuously added to be mixed with the mixture; the speed for adding the remaining steam blasting products causes the concentration of the steam blasting products in a reaction system not to be higher than 150 grams / liter; the weight of the first batch of steam blasting products which are mixed with the enzyme is10-30% of the total steam blasting products; the water content of the raw materials which contain cellulose is 30-60%. The method can effectively improve the sugar conversion rate of raw materials, namely the yield of monosaccharide; in addition, the method of continuously supplementing materials can also significantly shorten the enzymolysistime and improve the enzymolysis efficiency.

Description

technical field [0001] This invention relates to a process for the preparation of sugars, and more particularly to a process for the preparation of monosaccharides from cellulose-containing feedstocks. 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] Cellulose-containing raw materials are generally roots, stems and leaves of plants, including straw. The stalks are the roots, stems and leaves left after harves...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P19/02
Inventor 袁敬伟李春玲刘甲申林海龙王国忠解成华
Owner COFCO GROUP
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