Method and device for producing furfural by using biomass hydrolysis coupling pervaporation separation technology

A technology of pervaporation and pervaporation membrane is applied in the field of hydrolysate separation in biomass hydrolysis process, which can solve problems such as great difficulty and achieve the effects of improving yield, good application prospect and low energy consumption.

Active Publication Date: 2015-07-22
BEIJING UNIV OF CHEM TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of biomass hydrolysis to produce furfural, the temperature of the hydrolyzate (85-100°C) and the mass fraction of furfural (2.0wt%-6.5wt%) are both high. There are still great difficulties in pervaporation separation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for producing furfural by using biomass hydrolysis coupling pervaporation separation technology
  • Method and device for producing furfural by using biomass hydrolysis coupling pervaporation separation technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Using corncobs as biomass raw materials, continuous biomass hydrolysis coupled with pervaporation separation to produce furfural, the schematic diagram of the process is shown in figure 1 .

[0069] 1. Biomass hydrolysis to obtain furfural-containing hydrolyzate

[0070]Add corncobs that have been mechanically crushed and have a particle size of less than 2 cm into the hydrolysis device 11, and add sulfuric acid solution with a concentration of 10 g / L. The volume ratio (solid-to-liquid ratio) of corncobs to sulfuric acid solution is 1:8. Turn on the stirring motor on the hydrolysis device for acid mixing operation, so that the sulfuric acid solution is evenly distributed and fully in contact with the corn cob. Start the heater of the hydrolysis device to maintain the temperature in the hydrolysis device at about 160°C for hydrolysis.

[0071] 2. The furfural-containing hydrolyzate is filtered to obtain the furfural-containing hydrolyzate from which solids have been re...

Embodiment 2

[0085] The production process of Example 2 is the same as that of Example 1. The difference from Example 1 is that after the temperature in the hydrolysis device is maintained at 160°C for 3 hours, the valve at the lower end of the hydrolysis device is opened to carry out the biomass hydrolysis coupling pervaporation separation process, and the feed liquid The concentration and temperature of furfural in storage tank 13 are 3.0wt% and 90°C respectively. The concentration of furfural in the aqueous furfural concentrate obtained through pervaporation membrane separation is 80.17wt%, and the actual yield of furfural is 93%.

Embodiment 3

[0087] Using sweet sorghum stalks as biomass raw materials, furfural is produced by intermittent biomass hydrolysis coupled with pervaporation separation. The process flow diagram is shown in figure 2 .

[0088] 1. Biomass hydrolysis to obtain furfural-containing hydrolyzate

[0089] Put mechanically pulverized sweet sorghum stalks with a particle size of less than 0.5 cm into the hydrolysis device 11 and add acetic acid solution with a concentration of 30 g / L. The volume ratio (solid-to-liquid ratio) of sweet sorghum to acetic acid solution is 1:10. Turn on the stirring motor on the hydrolysis device for acid mixing operation, so that the acetic acid solution is evenly distributed and fully in contact with the sweet sorghum stalks. Turn on the heater of the hydrolysis device, and the temperature in the hydrolysis device is maintained at about 160°C.

[0090] 2. The furfural-containing hydrolyzate is filtered to obtain the furfural-containing hydrolyzate from which solids h...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
separation factoraaaaaaaaaa
Login to view more

Abstract

The invention relates to a device for producing furfural by using a biomass hydrolysis coupling pervaporation separation technology. According to the device, a biomass hydrolysis unit is coupled with a pervaporation membrane separation unit by virtue of a filtering unit and is used for separating furfural produced in a hydrolysis device. The invention also relates to a method for producing the furfural by using the device and the biomass hydrolysis coupling pervaporation separation technology. According to the method, separation and concentration of the efficient in situ pervaporation membrane on furfural-containing hydrolysate of which the furfural concentration is more than 2wt% is carried out so as to obtain a furfural concentrated solution with high concentration. By using the method, the furfural produced in the biomass hydrolysis process can be removed in time, and the yield of the furfural is improved; and meanwhile, compared with other existing in situ separation technology (air stripping and liquid-liquid extraction), the method is pollution-free and low in energy consumption.

Description

technical field [0001] The invention belongs to the technical field of separation of hydrolyzed products in a biomass hydrolysis process, and relates to a device for producing furfural by coupling pervaporation separation with hydrolysis of biomass and a method for producing furfural through coupling pervaporation separation with the device. Background technique [0002] Furfural, also known as furfural, is an important biomass platform compound. There are more than 1,600 chemical products that can be directly or indirectly produced from it, and are widely used in petroleum, daily chemical, textile, pharmaceutical and other industries. [0003] At present, no effective chemical synthesis method for the production of furfural has been found, and it can only be obtained by hydrolyzing hemicellulose in biomass raw materials. Among them, the most commonly used biomass raw materials mainly come from a wide range of sources and are rich in hemicelluloses, such as corncobs, bagasse...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/50
CPCY02P20/10
Inventor 秦培勇秦帆李树峰谭天伟
Owner BEIJING UNIV OF CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap