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Method for producing fuel alcohol through alkaline method preprocessing plant fibre

A plant fiber and fuel alcohol technology, applied in the direction of biofuels, fuels, liquid carbon-containing fuels, etc., can solve problems that have not been solved ideally, achieve obvious economic and social benefits, low cost, and reduce production costs Effect

Inactive Publication Date: 2008-05-21
HENAN TIANGUAN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, the industrialized production technology of utilizing crop stalks to make fuel alcohol has not yet been ideally solved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The production method of the present invention using corn stalks as raw materials: First, crush the corn stalks into 1-3 cm granular shapes, put them into a reaction kettle and mix and stir them with 0.5-5% sodium hydroxide aqueous solution at a weight ratio of 1:10 Evenly, heat up to 70°C with steam, keep warm for 6 hours, squeeze out the alkaline water with an extruder to obtain corn stalk dregs, then add 4 times the weight of water to soak the dregs for 3 hours to obtain slurry, and again The water in the slurry is squeezed out by an extruder to obtain corn stalk dregs with a water content of 60-80%. Then this bad material is mixed with 2.5 times of weight of water in the reactor, and the pH value is adjusted to 3.5~6.5 with sulfuric acid, and 6% liquid cellulase and 2% solid xylanase are added by the weight of the bad material, Enzymatic hydrolysis and saccharification at a temperature of 40°C. During the saccharification process, add corn stalk dregs with a water ...

Embodiment 2

[0016] Take wheat straw as an example for specific explanation.

[0017] The production method is basically the same as the raw material of corn stalks, the difference is that the weight ratio of sodium hydroxide aqueous solution in the crushed straw material is 1:12; The weight of water added is 8 times that of the bad material, the soaking time is 5 hours, the weight of water added during enzymatic hydrolysis and saccharification of the bad material is 3 times that of the bad material, and the added weight of liquid cellulase and solid xylanase is 8 times that of the bad material. % and 3.0%, the enzymatic saccharification temperature is 60°C. During the saccharification process, add corn stalk dregs with a water content of 60-80% every 10 hours, and the supplementary amount is 50% of the initial addition amount, and the addition is completed within 40 hours of saccharification. Synchronous fermentation of xylose-glucose genetically engineered yeast is added in an amount of...

Embodiment 3

[0019] Take sucrose residue as an example for specific explanation.

[0020] The production method is basically the same as that of corn stalks, the difference is that the weight ratio of sodium hydroxide aqueous solution in the crushed straw material is 1:8; The weight is 1 time of the bad material, the weight of water added during the enzymatic hydrolysis and saccharification of the bad material is twice the weight of the bad material, the addition weight of liquid cellulase and solid xylanase is 4% and 1.5% of the bad material respectively, enzymolysis The temperature of saccharification is 25°C. During the saccharification process, add corn stalk dregs with a water content of 60-80% every 2 hours. The supplementary amount is 20% of the initial addition amount. The addition is completed within 10 hours of saccharification. Synchronous fermentation of xylose-glucose genetically engineered yeast is added in an amount of 5% of the weight of the saccharified liquid, and the fe...

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Abstract

The invention relates to a method for pretreating the plant fiber with alkaline process to produce the fuel alcohol; the raw material of plant fiber is crushed and pretreated by sodium hydroxide solution to make the wood fiber residues; and then the residues are synchronously fermented by cellulase, xylanase and enzymolysis; the fermentation liquor is extracted and purified to get the alcohol. The invention can fully utilize the gramineous plant fiber and convert the waste into precious one; in this way, the invention is characterized by wide raw material sources, low price and cost; moreover, the invention is fit for industrial mass production and can substitute the method of burning alcohol industrial food raw materials. Therefore, the invention has obvious economic and social benefit.

Description

technical field [0001] The invention belongs to the technical field of alcohol production, in particular to a method for producing fuel alcohol by pretreating plant fibers with an alkali method. Background technique [0002] Alcohol is a kind of important industrial raw material, and its use is very extensive, and in known technology, the production of alcohol is mostly with grain as raw material, not only production cost is high, and because the shortage of grain raw material restricts the development of alcohol industry. Recently, the trend of using anhydrous alcohol as renewable energy to replace petroleum has become increasingly obvious, but the key is to open up new raw material resources and reduce the production cost of alcohol. Therefore, plant fibers with low cost and sufficient resources are used as fuel alcohol. Raw materials have become an important research topic. In my country, there are about 700 million tons of crop stalks in gramineous plants each year, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/10C10L1/02
CPCY02E50/16Y02E50/10
Inventor 张晓阳夏黎明康东亮阎振丽米锡耿吕世锋
Owner HENAN TIANGUAN GRP
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