Method for producing furfural from biomass

A biomass raw material, furfural technology, applied in chemical instruments and methods, preparation of organic compounds, separation/purification of carboxylic acid compounds, etc., can solve the problem that the production process cannot be carried out for a long time, the pentose solution cannot be recovered at the same time, and the packed tower Mixing effect is poor and other problems, to achieve the effect of strengthening micro-mixing and micro-mass transfer process, reducing production cost and equipment investment, and accelerating reaction

Inactive Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above-mentioned patents, the extractant and the pentose sugar solution are contacted and reacted countercurrently in the packed extraction tower, but the mixing effect of the packed tower is poor, and the serious side reactions lead to a low yield of furfural, with a maximum of only 70%; the condensation products generated by the side reactions are also It will accumulate on the surface of the filler and cause the filler to block, making the production process impossible to carry out for a long time; in addition, the above-mentioned inventive method cannot reclaim the acetic acid and formic acid of the pentose solution at the same time, and if the reacted aqueous solution is directly discharged, it will not only cause serious environmental pollution, but also waste of precious resources

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 for producing furfural from biomass
  • Method for producing furfural from biomass
  • Method for producing furfural from biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The crushed corn stalks and water were injected into the hydrolysis tank according to the mass ratio of 1:1. The pre-hydrolysis temperature was 160°C and the pre-hydrolysis time was 30 min. The mass concentrations of pentose, acetic acid and formic acid in the pentose solution obtained after the reaction were 5.2% and 2.5% respectively. , 0.7%.

[0038] The composite extractant used is dimethyl phthalate, n-octanol, ethyl triphenylphosphine hexafluorophosphate mixed solvent, wherein, dimethyl phthalate accounts for 40wt%, n-octanol accounts for 20wt%, Ethyl triphenylphosphine hexafluorophosphate accounts for 40wt%.

[0039] The feed ratio of extractant and pentose solution is 3:1 (volume ratio), and the feed rate of extractant and pentose solution is equal to the static mixer volume (that is, the feed volume space velocity is 1h -1 , that is, the reaction time is 1h), pump the extractant and pentose solution into the static mixer respectively, and react with the circul...

Embodiment 2

[0042] According to the method of Example 1, the difference is that the feed rate is twice the volume of the static mixer, that is, the reaction time is 0.5 h.

[0043] The experimental results showed that the conversion rate of pentose sugar was 77wt%, the yield of furfural was 60.4wt%, the recovery rate of acetic acid was 93.6wt%, and the recovery rate of formic acid was 90.2wt%.

Embodiment 3

[0045] According to the method of Example 1, the difference is that the feed rate is 0.67 times the volume of the static mixer, that is, the reaction time is 1.5 h.

[0046] The experimental results showed that the conversion rate of pentose sugar was 99%, the yield of furfural was 81.9%, the recovery rate of acetic acid was 93.6%, and the recovery rate of formic acid was 90.2%.

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
boiling pointaaaaaaaaaa
Login to view more

Abstract

The invention provides a method for producing furfural from biomass serving as a raw material. The method comprises the steps: hydrolyzing the biomass and water, so as to obtain a mixed solution of pentose, acetic acid and formic acid; introducing the mixed solution and an extractant into a static mixer for reaction, enabling a reaction effluent to be subjected to cooling, standing and layering, so as to obtain a water phase and an extracted phase, and enabling the extracted phase to enter an extractant regeneration tower for separation, so as to obtain a mixture, containing a trace volume of water, of furfural, acetic acid and formic acid from the tower top and obtain a regenerated extractant from the tower bottom; enabling the tower top product to enter a furfural refining tower for separation, so as to obtain acetic acid and formic acid, containing a trace volume of water, from the tower top and obtain furfural from a tower reactor; enabling the tower top product to enter an azeotropic rectifying tower, so as to extract the water phase from the tower top and obtain acetic acid and formic acid from a tower reactor; enabling the tower reactor product to enter a finishing column for separation, thereby obtaining formic acid and acetic acid. According to the method provided by the invention, the static mixer is adopted as a reaction vessel, and furfural is enabled to instantly achieve a balance in two phases, namely the extractant and the water, so that the yield of furfural is increased; the process flow is simple, meanwhile, furfural, acetic acid and formic acid are recovered, and no waste liquid is discharged, so that the method is an environment-friendly process.

Description

technical field [0001] The invention relates to a method for producing furfural from pentose sugars, in particular to a method for producing furfural by using a static mixer as a reactor and by-producting acetic acid and formic acid. Background technique [0002] Furfural, also known as furfural. Due to the existence of functional groups such as aldehyde groups, dienes, and cyclic ethers in the molecular structure of furfural, it has the properties of aldehydes, ethers, dienes, and aromatic compounds, and can participate in many different types of reactions and synthesize a variety of chemical products. It is used in food, medicine, synthetic resin, casting and many other production fields. [0003] Currently, furfural is produced from plant fibers rich in pentosan, such as corn cobs, bagasse, corn stalks, and rice husks. The principle is that pentosan is firstly hydrolyzed into pentose, and then the pentose is dehydrated and cyclized to furfural. [0004] According to wh...

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 Applications(China)
IPC IPC(8): C07D307/48C07C51/00C07C51/48C07C53/02C07C53/08
CPCC07D307/48C07C51/00C07C51/48
Inventor 薄德臣王海洋张龙张胜中高景山
Owner CHINA PETROLEUM & CHEM CORP
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