The process of electrochemically producing furandicarboxylic acid (2,5-Furandicarboxylic acid, FDCA) from hydroxymethylfurfural (5-Hydroxymethylfurfural, HMF), its derivatives, or a mixture thereof.

Abstract

Page 1 of 1 Summary of the invention. The present invention involves the process of manufacturing furandicarboxylic acid (2,5- Furandicarboxylic acid (FDCA) from hydroxymethylfurfural (5-Hydroxymethylfurfural, HMF) Derivatives of hydroxymethylfurfural, or a mixture of such substances, are generated through electrochemical processes. The product has a yield of over 95% and does not produce hydrogen gas, which poses a flammable risk. The process involves the following steps: a) Provide an electrochemical cell consisting of a reacting anode. Oxidation and reduction reactions occur at the cathode in a mixture containing hydrochloric acid. Oxymethylfurfural, hydroxymethylfurfural derivatives, or a mixture of these substances, which contain... Concentrated solutions ranging from 0.01 to 1 molar, and basic solutions with concentrations ranging from 0.02 to 5 molar. b) Apply an electric current in the range of 0.01 to 1 ampere to the electrochemical cell in step a) for a specified time. Within 0.5 to 5 hours. In this process, oxygen gas is supplied to the electrochemical cell during the supply. The electric current in step b)

Claims

OCR09WP03 / 09 / 25691. The process of producing 2,5-Furandicarboxylic acid (FDCA) from 5-Hydroxymethylfurfural (HMF), hydroxymethylfurfural derivatives, or a mixture of them using electrochemical processes consisting of the following steps: a) Providing an electrochemical cell consisting of an anode where oxidation occurs and a cathode where reduction occurs, in a mixture containing hydroxymethylfurfural derivatives. a) Apply an electric current of 0.01 to 1 ampere to the electrochemical cell in step a) for 0.5 to 5 hours. During this process, oxygen gas is supplied to the electrochemical cell to induce oxygen reduction and minimize the reduction of hydroxymethylfurfural at the cathode during the electric current application in step b).The process of producing furandicarboxylic acid according to patent 1, where the anode is an electrode of choice from porous metal foam or carbon materials; 3. The process of producing furandicarboxylic acid according to patent 1 or 2, where the anode also includes a catalyst of choice from nickel oxide, nickel oxyhydroxide mixture, or nickel oxyhydroxide mixture; 4. The process of producing furandicarboxylic acid according to patent 3, where the anode includes an iron-doped nickel oxide (Ni-Feoxides, NiFeOx) catalyst; 5. The process of producing furandicarboxylic acid according to either patent 3 or 4, where the amount of catalyst is in the range of 20 to 50 mg / cm² of the anode; 6. The process of producing furandicarboxylic acid according to patent 1, where the cathode is an electrode of choice from porous metal foam or carbon materials; 7.The process of producing furandicarboxylic acid according to patent 1 or 6, where the cathode is incorporated with a catalyst of choice from platinum, platinum alloy, nickel, nickel alloy, carbon, carbon alloy, or nickel oxyhydroxide alloy; 8. The process of producing furandicarboxylic acid according to patent 7, where the cathode is incorporated with a platinum catalyst; 9. The process of producing furandicarboxylic acid.

10. The process of producing dicarboxylic acid furan according to either claim 7 or 8, where the amount of catalyst is in the range of 0.1-0.3 mg / cm² of the cathode.

11. The process of producing dicarboxylic acid furan according to claim 1, where step a) the concentration of hydroxymethyl-furfural, a derivative of hydroxymethyl-furfural or a mixture of such substances is in the range of 0.02 to 0.1 molar.

12. The process of producing dicarboxylic acid furan according to claim 1, where step a) the concentration of the base solution is in the range of 0.1 to 0.5 molar.The process for producing furandicarboxylic acid according to claim 1, where step a) the base solution is selectable from potassium hydroxide (KOH), sodium hydroxide (NaOH), potassium carbonate (K2CO3), sodium carbonate (Na2CO3), potassium bicarbonate (KHCO3), and sodium bicarbonate (NaHCO3).

13. The process for producing furandicarboxylic acid according to claim 12, where step a) the base solution is potassium...

14. The process of producing furandicarboxylic acid according to claim 1, where the pH of the mixture in step a) is in the range of 12 to 14.

15. The process of producing furandicarboxylic acid according to claim 1, where the molar ratio between hydroxymethylfurfural, its derivatives, or a mixture of such substances to a base solution is in the range of 1:2 to 1:

5.

16. The process of producing furandicarboxylic acid according to claim 1, where in step b) an electric current of 0.05 to 0.5 amperes is applied. 17.

18. The process of producing furandicarboxylic acid according to claim 1, where step b) takes 1 to 2 hours.

19. The process of producing furandicarboxylic acid according to claim 1, where the process also includes a step of providing a selectively permeable membrane barrier between the anode and cathode prior to the execution of step b).

20. The process of producing furandicarboxylic acid according to claim 1, where the hydroxymethylfurfural derivative is selectable from 2,5-diformylfuran (DFF), 5-hydroxymethyl-2-furancarboxylic acid (HMFCA), 5-formyl-2-furancarboxylic acid (FFCA), methoxymethylfurfural (MMF), ethoxymethylfurfural (EMF).