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Method for simultaneously preparing furfuryl alcohol and furoic acid on the basis of bipolar membrane technology

A bipolar membrane and furfuryl alcohol technology, applied in sustainable manufacturing/processing, chemical industry, climate sustainability, etc., can solve problems such as low product yield, high price, and poor selectivity

Inactive Publication Date: 2010-02-17
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production equipment and catalysts used in the gas-phase method need to be imported from abroad, which is expensive. Therefore, most domestic furfuryl alcohol manufacturers currently use liquid-phase medium-pressure or high-pressure hydrogenation methods, but most Cu-Cr catalysts still need to be imported from abroad, and Chromium pollution is serious, and spent catalysts are difficult to regenerate
The process has poor selectivity, low product yield, high production cost and serious environmental pollution

Method used

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  • Method for simultaneously preparing furfuryl alcohol and furoic acid on the basis of bipolar membrane technology
  • Method for simultaneously preparing furfuryl alcohol and furoic acid on the basis of bipolar membrane technology
  • Method for simultaneously preparing furfuryl alcohol and furoic acid on the basis of bipolar membrane technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Inject 3.0mol·L into the cathode chamber -1 solution of furfural tetrabutylammonium bromide. Add 100g / L MnO in the anode chamber 2 , A mixed solution of 400g / L NaOH and 300mL furfural. Place the ultrasonic oscillator in the anode chamber of the electrolytic cell, the temperature of the electrolyte is 30°C, and the current density is 30mA·cm -2 . The electrolysis time was 50 minutes. The yield of furfuryl alcohol in the cathode compartment is 84%, and the current efficiency is 75%. The yield of furoic acid in the anode compartment was 87%. The current efficiency is 70%, and the electrolyzer voltage is 2.8V.

Embodiment 2

[0030] The electrolyte temperature is 45°C, and the current density is 70mA·cm -2 .

[0031] Inject 3.0mol·L into the cathode chamber -1 solution of furfural tetrabutylammonium bromide. Add 400g / L MnO in the anode chamber 2 , A mixed solution of 400g / L NaOH and 300mL furfural. Place the ultrasonic oscillator in the anode chamber of the electrolytic cell, and the electrolysis time is 30 minutes. The yield of furfuryl alcohol in the cathode compartment is 87%, and the current efficiency is 70%. The yield of furoic acid in the anode compartment was 82%. The current efficiency is 65%, and the electrolyzer voltage is 2.2V.

Embodiment 3

[0033] Electrolyte temperature 60°C, current density 70mA·cm -2 . Nafion single membrane is used as the diaphragm of the electrolyzer.

[0034] The electrolyte composition and process conditions of the anode chamber and the cathode chamber are the same as in Example 1. The electrolysis time was 20 minutes. The yield of furfuryl alcohol in the cathode compartment was 23%. The yield of furoic acid in the anode compartment is 45%, and the voltage of the electrolytic cell is 3.0V.

[0035] When Nafion single membrane is used as the diaphragm of the electrolyzer, because furfural and MnO 2 After the reaction, the incomplete hydrolysis to furoic acid must be carried out in an alkaline environment (Equation 2). In the anode chamber of the Nafion membrane cell, as the electrolysis time increases, the anode causes OH due to the oxygen evolution side reaction (equation 3) - The concentration decreased due to consumption, and the yield of furoic acid also decreased at a relatively ...

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Abstract

The invention relates to the field of electrochemical synthesis, in particular to a method for simultaneously preparing furfuryl alcohol in a cathode chamber and preparing furoic acid in an anode chamber on the basis of bipolar membrane technology, which has the effects of environmental protection, energy saving and emission reduction. By utilizing the principle that bipolar membranes are dissociated under the action of an electric field, hydrogen ions and hydroxide ions produced after water dissociation are respectively introduced into a cathode chamber and an anode chamber so as to regulatethe pH value of the reaction medium. The method electrooxidizes furfurol to prepare furoic acid in the anode chamber by utilizing an electro-catalyst MnO2 / MnOOH, and the electro-catalyst can be repetitively used so as to have the effects of environmental protection, energy saving and emission reduction; the method reduces the furfurol to prepare furfuryl alcohol in the cathode chamber by utilizingthe furfurol as the raw material. Compared with the traditional process, the method eliminates the pollution of the catalyst chromium in the production of the furfuryl alcohol and the furoic acid, has the advantages of mild production condition and simple equipment, and is a novel process having the advantages of environmental protection and energy saving.

Description

technical field [0001] The invention relates to the field of electrochemical synthesis, in particular to a method for preparing furfuryl alcohol in a cathode chamber and furoic acid in an anode chamber simultaneously based on bipolar membrane technology. The method has the effects of environmental protection, energy saving and emission reduction. technical background [0002] Furoic acid (also known as β-furan carboxylic acid or furan carboxylic acid) is an important raw material for synthetic resins, drugs, insecticides, etc. Furfural (C 5 h 4 o 2 ) oxidation to furoic acid is an important way to comprehensively utilize furfural resources. Furfural does not contain α-H and can undergo Cannizarro reaction under alkaline conditions. Therefore, the traditional process of furfural oxidation to furoic acid is often accompanied by the generation of a large number of by-products. [0003] Furfuryl alcohol (also known as furan methanol or oxomethanol) is an important raw mater...

Claims

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Application Information

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IPC IPC(8): C25B3/00C07D307/44C07D307/68
CPCY02P20/10
Inventor 陈震郑曦陈日耀陈晓郭贞贞
Owner FUJIAN NORMAL UNIV
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