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Device and method for electrooxidation of furfural and 5-hydroxymethylfurfural

A technology of hydroxymethylfurfural and electro-oxidation, which is applied in the field of electrochemistry, to achieve the effect of facilitating industrial production and reducing the amount of waste salt

Active Publication Date: 2022-06-07
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the use of high alkalinity to produce furoic acid exists in the form of salt in the solution, and it needs to be neutralized with a large amount of acid to obtain furoic acid. The industrial production of furoic acid will produce a large amount of waste salt

Method used

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  • Device and method for electrooxidation of furfural and 5-hydroxymethylfurfural
  • Device and method for electrooxidation of furfural and 5-hydroxymethylfurfural
  • Device and method for electrooxidation of furfural and 5-hydroxymethylfurfural

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]This embodiment provides a device for electro-oxidation of 5-hydroxymethyl furfural, such as figure 1 As shown, it includes: an anode structure, a cathode structure, and an intermediate cavity 1 for filling and permeating the lye to the outside through the sidewall, and the intermediate cavity 1 is arranged between the anode structure and the cathode structure.

[0044] The anode structure communicates with the intermediate cavity 1 through a layer of anode membrane 9 .

[0045] The cathode structure is communicated with the intermediate cavity 1 through a layer of cathode membrane 8 .

[0046] The anode structure includes an anode cavity 3 with an anode flow channel 4 opened therein, a porous drainage body 6 covering the opening of the anode flow channel 4 to conduct electricity, and a porous support body disposed inside the porous drainage body 6. 15 and the anode catalyst layer 14 coated on the inner side of the porous support body 15 , and the inner side of the anod...

Embodiment 2

[0079] This embodiment provides a device for electro-oxidation of 5-hydroxymethyl furfural, such as figure 2 As shown, its structure is different from the structure in Example 1 in that:

[0080] In this embodiment, the cathode and anode cavities are both metal cavities, the porous support body is a porous support body made of foamed nickel, and the metal cavity corresponds to the cathode and anode of an external power supply;

[0081] The catalytic layer is connected to the cathode and anode of the corresponding power source through the porous support body made of foamed nickel and the cavity made of metal.

[0082] The present embodiment provides a method of utilizing HMF to prepare FDCA, the steps of which include:

[0083] After stirring the mixed solution of 0.05mol / L HMF and 0.1mol / L NaOH at room temperature, it was mixed into the anode electrolytic cell, and 0.1mol / L NaOH was introduced into the middle cavity to provide the pH required for the reaction; then take the ...

Embodiment 3

[0087] This embodiment provides a device for electro-oxidation of 5-hydroxymethyl furfural, the structure of which is the same as that in Embodiment 2.

[0088] The present embodiment provides a method of utilizing HMF to prepare FDCA, the steps of which include:

[0089] After stirring the mixed solution of 0.05mol / L HMF and 0.1mol / L NaOH at room temperature, it was mixed into the anode electrolytic cell, and 3mol / L NaOH was introduced into the middle cavity to provide the pH required for the reaction, and then take the equimolar concentration with the anode, etc. The volume of NaOH is added to the cathode electrolysis cell;

[0090] to coat Ni(OH) 2 The nickel foam of / CNTs was used as the anode electrode, Hg / HgO was used as the reference electrode, and the nickel foam was used as the cathode electrode.

[0091] After testing, the conversion rate of HMF was 76.4%, the yield of FDCA was 60.5%, the selectivity was 79.2%, and the Faradaic efficiency was 71.3%.

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Abstract

The invention provides a device for electrooxidation of furfural and 5-hydroxymethylfurfural, the device comprises a middle cavity used for being filled with alkali liquor and permeating the alkali liquor outwards through the side wall, the two sides of the middle cavity are respectively provided with an anode structure and a cathode structure, and the anode structure and the cathode structure are both communicated with the middle cavity through a layer of diaphragm; each of the anode structure and the cathode structure comprises a catalyst layer in close contact with the diaphragm, a porous support body in contact with the catalyst layer, and a cavity with a flow channel, a liquid inlet and a liquid outlet. When the device is used for preparing FDCA and furoic acid, reaction is promoted under high alkalinity, side reaction of furfural or 5-hydroxymethylfurfural under the high alkalinity condition is avoided, and the amount of waste salt generated by purification of FDCA and furoic acid is reduced. The invention also provides a method for preparing FDCA and furoic acid by using the device. The method has simple process steps.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular, to a device and method for electrooxidation of furfural and 5-hydroxymethylfurfural. Background technique [0002] As a new type of renewable non-fossil resources, biomass is considered as a potential substitute for fossil resources. 5-Hydroxymethylfurfural, or HMF for short, is one of the important representative platform compounds of biomass resources. By oxidizing HMF, 2,5-furandicarboxylic acid, or FDCA for short, can be prepared, and bio-based poly-2,5-furan can be further synthesized. Replacing polyethylene terephthalate (PET) with polyethylene terephthalate (PEF) to achieve large-scale production of bio-based degradable plastics. Compared with the chemical oxidation method to prepare FDCA, the electrochemical oxidation of HMF can be carried out at room temperature and pressure. This reaction does not require noble metal catalysts or chemical oxidants, so it is regarded as a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/23C25B3/07C25B3/05C25B9/21C25B11/031C25B9/13
CPCC25B3/23C25B3/07C25B3/05C25B9/21C25B11/031C25B9/13Y02P20/584
Inventor 王建设周少博徐春保张永胜白净王留成赵建宏程相林
Owner ZHENGZHOU UNIV
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