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Method for preparing monosaccharide by using raw material containing cellulose

A cellulose and raw material technology, applied in the field of monosaccharide preparation, can solve the problems of reducing the yield of monosaccharide, reducing the proportion of cellulose, and low enzymatic hydrolysis efficiency, so as to achieve the effect of benefiting production efficiency and improving yield

Active Publication Date: 2009-09-09
COFCO GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to overcome the defects of low monosaccharide yield and low enzymolysis efficiency of the existing method for preparing monosaccharide from cellulose-containing raw materials, and provide a monosaccharide with high yield and high enzymolysis efficiency. Method for preparing monosaccharides from raw materials containing cellulose
The presumed reason may be that due to the large amount of cellulose-containing raw materials put into the steam explosion device in each batch, and the difference in the accumulation mode of each batch of raw materials or the instability of steam explosion conditions, it is impossible to ensure that all the cellulose-containing raw materials The cellulose raw material fully absorbs the water vapor within a few minutes after being steamed, therefore, there will still be most of the cellulose-containing raw materials that cannot be completely exploded by the water vapor inside because they cannot fully absorb the water vapor. As a result, the lignin sheath embedding cellulose and hemicellulose in cellulose-containing raw materials cannot be fully destroyed, reducing the proportion of cellulose in cellulose-containing raw materials that can be contacted with enzymes, thereby reducing the yield of monosaccharides

Method used

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  • Method for preparing monosaccharide by using raw material containing cellulose
  • Method for preparing monosaccharide by using raw material containing cellulose
  • Method for preparing monosaccharide by using raw material containing cellulose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] This example is used to illustrate the method of the present invention for preparing monosaccharides from cellulose-containing raw materials.

[0064] (1) Continuous steam explosion

[0065] test as figure 1 The shown corn stalk raw material, the water content of the corn stalk measured according to the above method is 20% by weight, the raw material is cut into small sections of 1.5 cm × 0.2 cm × 0.5 cm, and the water content of the corn stalk section is 20% by weight. It was continuously fed from the feeder, and was drenched with water before being transported to the heat-retaining pressure device, so that the water content of the corn stover segment was 40% by weight. Then, 2000 grams of the corn stover with a water content of 40% by weight was continuously transported to a heat preservation pressure device. The pressure of the heat preservation pressure device was 1.6 MPa and the temperature was 195°C. The corn stover was continuously maintained in the heat preserv...

Embodiment 2

[0073] This example is used to illustrate the method of the present invention for preparing monosaccharides from cellulose-containing raw materials.

[0074] The monosaccharide was prepared according to the method of Example 1, except that the corn stover with a water content of 20% by weight was continuously fed from the feeder, and was drenched with water before being transported to the heat preservation pressure device. The moisture content of the corn stover segment was 75% by weight. Then according to the conditions and methods of Example 1, 2000 grams of corn stover with a water content of 75% by weight are continuously transported to the heat-retaining pressure device for continuous steam explosion, and 3000 grams of solid steam-exploded goods are obtained after collecting the steam-exploded goods and washing with water ( The water content is 83.3% by weight).

[0075] According to the method for HPLC analysis of sulfuric acid hydrolyzed steam explosion products descri...

Embodiment 3

[0078] This example illustrates the method of the present invention for preparing monosaccharides from cellulose-containing raw materials.

[0079] The monosaccharide was prepared according to the method of Example 1, except that after 2000 grams of corn stover with a water content of 20% by weight was continuously fed from the feeder, it was directly transported to the heat preservation pressure device without water drenching for continuous continuous feeding. Steam explosion, the conditions of steam explosion are the same as in Example 1, and after collecting the steam explosion waste and washing with water, a total of 3556 grams of solid steam explosion waste (water content is 55% by weight) is obtained.

[0080] According to the method of HPLC analysis of sulfuric acid hydrolyzed steam explosion products described in Example 1, it was found that 3556 grams of steam explosion products contained 680 grams of cellulose and 193.8 grams of hemicellulose in total.

[0081] Accor...

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Abstract

The invention discloses a method for preparing monosaccharide by using a raw material containing cellulose, which comprises the steps of subjecting the raw material containing cellulose to steam explosion and mixing an obtained product of the steam explosion with an enzyme for enzymolysis, wherein a method for the steam explosion of the raw material containing cellulose comprises the steps of continuously delivering the raw material containing cellulose to a heat-preservation pressure unit, keeping the raw material containing cellulose in the heat-preservation pressure unit for 3 to 10 minutes first and then releasing part of the raw material containing cellulose in the heat-preservation pressure unit to normal pressure every other 5 to 12 seconds; and a method for mixing the product of the steam explosion and the enzyme comprises the step of mixing the product of the steam explosion with the enzyme in batches, wherein the batches are at least two batches, and in each batch, the additive amount of the product of the steam explosion accounts for 60 percent of the total weight of the product of explosion at most. The method can improve the monosaccharide yield effectively.

Description

technical field [0001] The present invention relates to a method for the preparation of sugars, and more particularly, to a method for the preparation of monosaccharides using cellulose-containing raw materials. Background technique [0002] The prior art methods for preparing monosaccharides for ethanol from cellulose-containing raw materials, such as straws, mainly include the pretreatment of straws, and the steps of enzymatic hydrolysis of cellulose and / or hemicellulose to prepare monosaccharides. The existing method for preparing ethanol from cellulose-containing raw materials, such as straw, includes the step of fermenting the enzymatic hydrolysis product monosaccharide in addition to the above steps. [0003] Cellulose-containing raw materials are generally plant roots, stems and leaves, including straw. The straw refers to the roots, stems and leaves of crops (usually herbs) left after harvesting fruits, mainly stems and leaves, such as corn straw, sorghum straw, whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/02C12P19/14
Inventor 李春玲岳国君袁敬伟李杰解成华林海龙
Owner COFCO GROUP
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