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Method for extracting sugar from wood fiber substances

A technology for wood fiber and cellulosic raw materials, which is applied in the field of sugar production, can solve the problems of high steam-explosion treatment intensity, long pretreatment process, and large energy consumption, and achieve low steam-explosion treatment intensity, reduce processing costs, and reduce energy consumption. consumption effect

Active Publication Date: 2013-01-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can effectively improve the efficiency of enzymatic hydrolysis of cellulose and the yield of alcohol, the straw must be soaked for a long time before the steam-explosion treatment, at least for more than 11 hours, so the pretreatment process is long, and the intensity of the steam-explosion treatment is relatively high. high energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] First, the crushed and sieved corn stalk particles (20-60 mesh) and tin chloride aqueous solution are mixed and stirred to prepare a raw material slurry. The mass concentration of tin chloride in the raw material slurry is 0.5%, and the mass concentration of straw particles is 50%. Then the raw material slurry was steam exploded at 0.8MPa and 190℃ for 5min. After the reaction, the pH value of the solid-liquid mixture was adjusted to 5.0, enzymatically hydrolyzed at 50℃ for 72 hours, and the dosage of cellulase was 30FPU / g cellulose , To obtain a hydrolysate containing glucose and xylose and can be used to ferment ethanol. The mass concentration of xylose in the hydrolysate was 5.6%, the mass concentration of glucose was 9.8%, the yield of xylose was 65.9%, and the yield of glucose was 72.0%.

Embodiment 2

[0022] First, the crushed and sieved corn stalk particles (20-60 mesh) and the tin chloride aqueous solution are mixed and stirred uniformly to prepare a raw material slurry. The mass concentration of tin chloride in the raw material slurry is 1%, and the mass concentration of straw particles is 50%. Then the raw material slurry was steam exploded at 0.8MPa and 190°C for 2min. After the reaction, the pH value of the solid-liquid mixture was adjusted to 5.0 and enzymatically hydrolyzed at 50°C for 72 hours. The dosage of cellulase was 30FPU / g cellulose. The hydrolyzate containing glucose and xylose is obtained and can be used for ethanol fermentation. The mass concentration of xylose in the hydrolysate was 5.9%, the mass concentration of glucose was 10.2%, the yield of xylose was 69.4%, and the yield of glucose was 74.9%.

Embodiment 3

[0024] First, the crushed and sieved corn stalk particles (20-60 mesh) and the tin chloride aqueous solution are mixed and stirred uniformly to prepare a raw material slurry. The mass concentration of tin chloride in the raw material slurry is 2%, and the mass concentration of straw particles is 50%. Then the raw material slurry was steam exploded at 0.8MPa and 180°C for 3min. After the reaction, the pH value of the solid-liquid mixture was adjusted to 5.0 and enzymatically hydrolyzed at 50°C for 72 hours. The dosage of cellulase was 30FPU / g cellulose. The hydrolyzate containing glucose and xylose is obtained and can be used for ethanol fermentation. The mass concentration of xylose in the hydrolysate was 6.7%, the mass concentration of glucose was 10.5%, the yield of xylose was 78.8%, and the yield of glucose was 77.1%.

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Abstract

The invention discloses a method for extracting sugar from wood fiber substances. The method includes that first, smashed fiber raw materials are mixed with a stannic chloride solution to obtain raw material size, then steaming and blasting are conducted for 2-5 min under the condition of 0.6-0.8 MPa and at the temperature of 160-190 DEG C, after reaction solid-liquid mixture is not separated and directly used as raw materials for enzymatic hydrolysis, and hydrolysate containing sugar is obtained after enzymatic hydrolysis. The method is short in operation procedure, low in energy consumption, high in raw material use rate and good in saccharification effect.

Description

Technical field [0001] The invention relates to a method for preparing sugar from wood fiber substances. technical background [0002] Fuel ethanol, as one of the most promising renewable energy sources, has attracted more and more attention from various countries. From a long-term perspective, we must find abundant and cheap sources of energy raw materials. The production of biofuels from lignocellulosic substances is an effective way to solve the future fuel shortage. At present, the process of using lignocellulose to produce alcohol at home and abroad is to first hydrolyze the cellulose material and then ferment. Lignocellulosic biomass can be hydrolyzed only in the presence of catalysts. Commonly used catalysts include inorganic acids and enzymes. Compared with acid hydrolysis, enzymatic hydrolysis has the advantages of single product and higher concentration, and is currently the main method of hydrolysis. Due to the complex structure of lignocellulosic biomass, it is dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14
Inventor 王鑫乔凯金平
Owner CHINA PETROLEUM & CHEM CORP
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