Method for producing dihydroxyacetone by electrochemical oxidation of glycerol and coupling hydrogen production

The method for preparing dihydroxyacetone by electrochemical oxidation of glycerol coupled with hydrogen production utilizes the complexation effect of glycerol alkaline solution and borate, combined with an H-type electrolyzer, to solve the problems of insufficient selectivity and poor catalyst stability in existing technologies, and achieves highly selective synthesis of dihydroxyacetone and high-purity hydrogen.

CN122303904APending Publication Date: 2026-06-30SHANGHAI UNIVERSITY OF ELECTRIC POWER
0 Cites 0 Cited by

Patent Information

Application Number
CN202610412924.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-31
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In existing technologies, the oxidation of glycerol to dihydroxyacetone has insufficient selectivity, the catalysts are expensive and have poor stability, and it is difficult to effectively suppress carbon-carbon bond breaking in an alkaline environment, resulting in the generation of low-value byproducts.

Method used

Using a glycerol alkaline solution as the electrolyte, dihydroxyacetone is prepared by selective oxidation at the anode via an electrochemical method, and high-purity hydrogen is generated at the cathode via hydrogen evolution reaction. The complexation of borate and glycerol forms a cyclic borate chelate, and the steric hindrance effect guides the selective oxidation, inhibiting carbon-carbon bond breaking. Combined with the physical separation of the reaction in the H-type electrolytic cell, the generation of by-products is avoided.

Benefits of technology

This method achieves highly selective synthesis of dihydroxyacetone while generating high-purity hydrogen, improving overall Faraday efficiency, reducing the risk of catalyst poisoning, and enhancing reaction stability and economy.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to the technical field of hydrogen production, in particular to a coupling hydrogen production method for producing dihydroxyacetone through electrochemical oxidation of glycerin. Comprising the following steps: S1, preparing a glyceroalkali solution as an electrolyte solution, wherein the purity of the glyceroalkali solution needs to reach an analytically pure level; s2, placing the electrolyte solution prepared in the step S1 in an electrolytic bath, connecting a positive electrode of a power supply with an anode piece in the electrolytic bath, and connecting a negative electrode of the power supply with a cathode piece in the electrolytic bath; and S3, a power supply is switched on, an oxidation-reduction reaction and a hydrogen evolution reaction are carried out at the limited temperature, dihydroxy acetone prepared through anodic oxidation is obtained, and hydrogen prepared through cathodic hydrogen evolution is synchronously obtained. According to the invention, the glyceroalkali solution is used as an electrolyte solution to construct a synergistic reaction system of preparation of dihydroxyacetone by selective oxidation of an anode and efficient hydrogen evolution of a cathode, the glyceroalkali solution weakens the nucleophilic attack intensity of hydroxyl ions, and inhibits breakage of carbon-carbon bonds through an in-situ protection mechanism on a glycerol carbon chain, so that the hydrogen evolution efficiency is improved. The high-selectivity directional synthesis of the dihydroxy acetone is realized.
Need to check novelty before this filing date? Find Prior Art