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Method for producing fuel alcohol by treating corn straw with propanoic acid

A technology for corn stalks and fuel alcohol, applied in the chemical industry, can solve the problems of difficult recovery, corrosiveness, large consumption, etc., and achieve the effects of eliminating inhibition, saving production time, and improving production efficiency.

Inactive Publication Date: 2012-03-14
李静
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkaline hydrogen peroxide, ammonia water) to process raw materials, lye not only consumes a lot, but also is difficult to recycle, and part of the cellulose is lost, so it is not suitable for large-scale production. Although the acid method can effectively hydrolyze cellulose, they are all corrosive. Harmful to the human body

Method used

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Embodiment

[0011] A method of using propionic acid to treat corn stalks to produce fuel alcohol, using propionic acid to degrade lignocellulosic raw materials, degrading corn stalks into cellulose, hemicellulose and lignin in a closed cycle under mild conditions, and treating them with propionic acid The corn stalks are used as the substrate, adding appropriate amount of nutrients, the cellulosic enzyme koji and the corn stalks treated with propionic acid are mixed, and the fuel alcohol is produced by synchronous saccharification and fermentation process, which specifically includes the following steps:

[0012] (1) corn stalks, air-dried and ground;

[0013] (2) Propionic acid treatment of corn stalks, the ratio of material to liquid is 1:12, the concentration of propionic acid is 900g / L, the concentration of catalyst is 3g / L, steamed for 90min, filtered, and the filter residue is washed with water and acetone until the pH is neutral, Its main component is fiber cord;

[0014] (3) Prep...

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PUM

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Abstract

The invention relates to a method for producing fuel alcohol, particularly relates to a method for producing fuel alcohol by treating corn straw with propanoic acid, and belongs to the technical field of chemical industry. The method comprises the steps: degrading a wood fiber raw material with propanoic acid, namely degrading corn straw into cellulose, hemicellulose and lignin under mild conditions in a closed circulation manner; and adding a proper amount of nutrients to the corn straw which is treated with propanoic acid and used as a substrate, namely mixing cellulase yeast with the corn straw which is treated with propanoic acid, and carrying out synchronous saccharification and fermentation process to produce the fuel alcohol.

Description

technical field [0001] The invention relates to a method for producing fuel alcohol, in particular to a method for producing fuel alcohol by treating corn stalks with propionic acid, and belongs to the technical field of chemical industry. Background technique [0002] In our country, especially in the northern region, the annual output of crop straw is as high as 700 million tons, and the output of corn straw is second only to rice straw and wheat straw. However, corn straw has not been fully utilized, and most of it is burned as straw. The environment is polluted. In recent years, acid or enzymatic hydrolysis technology can be used to convert the cellulose into monosaccharides. And it can be further made into fuel alcohol. Corn straw is mainly composed of cellulose, hemicellulose and lignin. Due to its complex and stable composition, high crystallinity and serious lignification, it is difficult to be decomposed by microorganisms and cellulase. Therefore must carry out p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/10C12R1/645
CPCY02E50/10
Inventor 李静
Owner 李静