Method for preparing absolute ethyl alcohol from furfural residue

An anhydrous ethanol and furfural slag technology, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of high equipment investment cost and small device processing capacity, achieve stable product quality and improve utilization rate , the effect of a large amount of resources

Inactive Publication Date: 2009-04-22
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

(3) The comprehensive development and utilization of plant cellulose raw materials needs to be explored, especially the clean separation and efficient utilization of hemicellulose and lignin
Membrane separation mainly refers to pervaporation dehydration. Although ethanol aqueous solution can be separated at the lowest constant boiling point, the equipment investment cost is high and the processing capacity of the device is small.

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  • Method for preparing absolute ethyl alcohol from furfural residue

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Embodiment 1

[0034] The process flow chart of preparing absolute ethanol from furfural slag in this embodiment is as follows figure 1 As shown, the specific process is as follows:

[0035] A pressurized rapid extraction method is used to extract and separate lignin from furfural residue. The mass concentration of ethanol aqueous solution of the extractant is 50%, the weight ratio of ethanol to furfural residue is 15:1, and the extraction temperature is 110°C. Pressurize for 5 minutes, pressurize at 0.6 MPa, and circulate for 1.5 hours. After the lignin extraction is completed, filter. The extract was distilled under reduced pressure, the distillate ethanol was condensed and could be recycled as an extractant, and the distillation residue was vacuum-dried at 55°C to prepare lignin with a product yield of 33.4%.

[0036] Put the sterilized extraction residue into a fermenter, and the fermenter is coupled with a pervaporation separation device. The solid-liquid ratio is 9% (w / v) during synch...

Embodiment 2

[0040] A pressurized rapid extraction method is used to extract and separate lignin from furfural residue. The mass concentration of ethanol aqueous solution of the extractant is 55%, the weight ratio of ethanol to furfural residue is 12:1, the extraction temperature is 90°C, and the pressure is increased for 10 minutes during extraction, and the increase is stopped. Press for 10 minutes, pressurize at 0.5 MPa, and circulate for 3 hours. After the lignin extraction is completed, filter. The extract was distilled under reduced pressure, and the distillate ethanol was condensed and could be recycled as an extractant, and the distillation residue was vacuum-dried at 55°C to prepare lignin with a product yield of 32.6%.

[0041] Put the sterilized extraction residue into the fermenter, the fermenter is coupled with the pervaporation separation device, the solid-liquid ratio is 10% (w / v) during the synchronous saccharification and fermentation, the dosage of cellulase is 20FPU / (g ce...

Embodiment 3

[0043] A pressurized and rapid extraction method is used to extract and separate lignin from furfural residue. The mass concentration of ethanol aqueous solution of the extractant is 60%, the weight ratio of ethanol to furfural residue is 18:1, the extraction temperature is 120°C, and the pressure is increased for 5 minutes during extraction, and the increase is stopped. Pressurize for 5 minutes, pressurize at 0.6 MPa, and circulate for 0.5 hours. After the lignin extraction is completed, filter. The extract was distilled under reduced pressure, the distillate ethanol was condensed and could be recycled as an extractant, and the distillation residue was vacuum-dried at 55°C to prepare lignin with a product yield of 34.7%. Put the sterilized extraction residue into a fermenter, and the fermenter is coupled with a pervaporation separation device. The solid-liquid ratio is 8% (w / v) during synchronous saccharification and fermentation, and the amount of cellulase is 16 FPU / (g cellu...

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Abstract

The invention provides a method for preparing absolute ethyl alcohol by furfural residues. A furfural residue cellulose raw material is adopted, lignin is separated, and then the absolute ethyl alcohol is obtained through synchronous diastatic fermentation and pervaporation coupling separation of alcohol, then distillation, pervaporation dehydration and rectification. The method has the advantages that the method organically combines the prior mature rectification technology with a modern advanced separation technology to improve the production efficiency when high fiber raw materials are used to prepare the absolute ethyl alcohol.

Description

technical field [0001] The invention relates to a method for preparing anhydrous ethanol from furfural slag, specifically, after separating lignin from furfural slag, it is coupled and separated by synchronous saccharification and fermentation and ethanol pervaporation, and then prepared by distillation, pervaporation dehydration and rectification. A new method for water ethanol belongs to the field of biomass chemistry and chemical industry. Background technique [0002] Fuel ethanol refers to the use of ethanol as fuel power. Ethanol is a colorless, transparent, and easy-flowing liquid that can directly replace gasoline, diesel and other petroleum fuels as civil fuel or internal combustion engine fuel. The use of ethanol as fuel has many advantages: ethanol can be produced from renewable biomass, and there is no problem of resource depletion; ethanol technology is relatively mature, and the process is relatively complete; ethanol as a liquid fuel has high energy density an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/08C12R1/865
Inventor 蒋建新齐祥孙冉冯月李瑞刘圣英
Owner BEIJING FORESTRY UNIVERSITY
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