Process for the production of furfural

A kind of technology of furfural and reaction vessel, applied in the field for preparing furfural

Inactive Publication Date: 2014-09-03
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A yield of 82% was obtained at 0.39 parts xylose per 100 parts aqueous solution, but only a 49% yield

Method used

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  • Process for the production of furfural
  • Process for the production of furfural
  • Process for the production of furfural

Examples

Experimental program
Comparison scheme
Effect test

example

[0088] The methods described herein are illustrated in the following examples. From the above discussion and these Examples, one skilled in the art can ascertain the characteristics of this invention, and without departing from the spirit and scope thereof, can make various changes and modifications of the invention to adapt it to different usage and conditions .

[0089] abbreviation

[0090] The meanings of the abbreviations are as follows: "BP" refers to the boiling point at a pressure of 0.101 MPa, "cm" refers to centimeters, "DMSO" refers to dimethyl sulfoxide, "MP" refers to melting point, "FF" refers to furfural, "g" means grams, "h" means hours, "HPLC" means high pressure liquid chromatography, "m" means meters, "min" means minutes, "mL" means milliliters, and "mm" means mm, "MPa" refers to megapascals, "PTFE" refers to poly(tetrafluoroethylene), "rpm" refers to revolutions per minute, "wt%" refers to weight%, "μL" refers to microliters and " μm" means micrometers...

example 1

[0096] Example 1: Furfural yield in various solvents

[0097] The solvents used in this example are described in Table 1.

[0098] Table 1.

[0099] name

CAS registration number

BP(°C)

MP(°C)

Sulfolane

126-33-0

285

20

PEG (polyethylene glycol) 4600

25322-68-3

＞200

°

PEG10000

25322-68-3

＞200

63

PEG1000

25322-68-3

＞200

39

Isosorbide Dimethyl Ether

5306-85-4

234

°

Propylene carbonate

108-32-7

240

-55

Adipic acid

124-04-9

338

154

Poly(ethylene glycol) dimethyl ether

24991-55-7

＞250

Isosorbide

652-67-5

＞200

Cerenol TM 250 (poly-1,3-propanediol)

345260-48-2

＞200

Cerenol TM 1000 (poly-1,3-propanediol)

345260-48-2

＞200

Diethylene glycol

111-46-6

245

-10

Glycerin

56-81-5

290

20

Bisphenol A

80-05-...

example 2

[0108] Example 2: Preparation of furfural with sulfolane as solvent

[0109] The conversion of xylose to furfural was also characterized by the use of sulfolane as solvent and sulfuric acid as acid catalyst. A series of experimental runs were performed using variations of the following conditions: 0.1 to 1.5% by weight sulfuric acid based on the weight percent of sulfolane; 5 to 25% by weight xylose in water; and an average reaction temperature of 140 to 190°C during the experiments ; The rate of addition of aqueous xylose solution was 0.1 to 0.4 mL / min.

[0110] For this set of reactions, the following experimental variables were kept constant: the solvent was sulfolane, the mass of the solvent was 5 g, the stirring rate was about 500 rpm, the reaction time was 40 min, and the reaction setup and analysis method were as described in Example 1.

[0111] The xylose solution was added at a defined rate at a specified reaction temperature to a reaction vessel containing sulfuri...

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Abstract

Furfural is produced by mixing an aqueous feedstock solution containing C5 sugar and/or C6 sugar with a heated, high boiling, water-miscible solvent, such as sulfolane, and a soluble acid catalyst. Furfural product and water are distilled off through a multistage distillation column, leaving non-volatile solvent behind. Typical furfural yields with sulfolane as the reaction solvent are about 80% at as high as 99% conversion. Also, certain by-products (e.g., humins) solubilized in the reaction solvent can be precipitated by addition of water or aqueous feedstock solution and then removed by filtration, thereby providing a convenient and effective way of removing these undesirable byproducts from the reaction mixture.

Description

[0001] This patent application is claimed under 35 U.S.C. §119(e) of U.S. Provisional Application No. 61 / 580,711, filed December 28, 2011; and U.S. Provisional Application No. 61 / 580,714, filed December 28, 2011 rights and interests; each of the aforementioned documents is incorporated herein by reference. technical field [0002] The present invention provides for use by C 5 and C 6 Process for preparing furfural from sugar. Background technique [0003] Furfural and related compounds are useful precursors and raw materials for industrial chemicals used as drugs, herbicides, stabilizers and polymers. Current furfural production methods utilize biomass such as corncobs, bagasse, switchgrass, or wood waste as raw materials for obtaining glucose, glucose oligomers, cellulose, xylose, xylose oligomers, arabinose, hemicellulose, and others. C 5 and C 6 Sugar monomers, dimers, oligomers and polymers. [0004] Hemicellulose and cellulose are hydrolyzed under acidic condition...

Claims

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Application Information

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IPC IPC(8): C07D307/48B01J27/053B01J29/82
CPCC07D307/50C07D307/48
Inventor P.J.法干R.奧泽尔E.J.蒂尔
Owner EI DU PONT DE NEMOURS & CO
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