Method for preparing 2, 5-furandicarboxylic acid (FDCA) by using sodium hypochlorite to perform electro-catalysis on 5-hydroxymethylfurfural (5-HMF)

Abstract

The invention discloses a method for preparing 2, 5-furandicarboxylic acid (FDCA) by using sodium hypochlorite to perform electro-catalysis on 5-hydroxymethylfurfural (5-HMF). The method is characterized by comprising the following steps: evenly mixing the 5-HMF, the sodium hypochlorite and an alkaline solution at the room temperature to obtain a mixed solution, and mixing the mixed solution intoan anode electrolytic cell; adding an alkaline solution into a cathode electrolytic cell, wherein the volume of the added alkaline solution is equal to that of the mixed solution, and the molar concentration of the added alkaline solution is equal to that of solute of the alkaline solution in the mixed solution; taking an anode material as an anode electrode, and carrying out a reaction for 1-12hunder the condition that the potential is 1.0-2.0V so as to obtain the FDCA. The method first uses the sodium hypochlorite and electrolyzed effective chlorine component thereof as an oxidizing agent,takes cheap metals and metal compounds as the anode electrode, replaces the traditional precious metal-based electrode material catalyst with an oxidation reaction catalyst, and replaces the traditional high temperature and high pressure thermal catalytic reaction with a mild electrooxidation reaction at room temperature and atmospheric pressure, so that the cost is greatly lowered, the reaction process is simplified, the energy is saved, the conversion rate of the 5-HMF is further increased, the yield and selectivity of the FDCA are approached, and the industrial production of the FDCA is promoted.

Description

technical field [0001] The invention relates to the fields of fine chemical industry and electrochemistry, in particular to a method for preparing FDCA by electrocatalyzing 5-HMF with sodium hypochlorite. Background technique [0002] At present, with the decline of fossil fuels such as coal, oil and natural gas and the rapid growth of the world population, it is imminent to develop renewable and sustainable biomass fuels and chemicals. Lignocellulose is an abundant, cheap and renewable resource in nature, which can be used to prepare some sugar derivatives, which can further synthesize 5-hydroxymethylfurfural (5-HMF). 5-HMF is an important intermediate for the preparation of biomass-based renewable chemicals and fuels. [0003] 2,5-furandicarboxylic acid (FDCA) is a furan derivative produced by the oxidation of 5-HMF. It is a green monomer for the synthesis of furyl polyesters and fine chemicals, and is considered to be one of the 12 basic compounds used to establish the ...

AI Technical Summary

Problems solved by technology

These methods have disadvantages such as high cost of oxidant and catalyst and easy deactivation.

In recent years, there have also been reports of using hydrogen peroxide or oxygen as an oxidant, and non-precious metal iron and copper as a catalyst, which reduces the reaction cost, but the product yield is not ideal, and most of the reaction conditions are high temperature and high pressure, which are relatively harsh (ACS Catalysis, 2015, 5( 11): 6529-6544.)

With the advancement of science and technology, the preparation of FDCA by electrocatalytic oxidation of 5-HMF has attracted attention as a new synthetic method, but expensive noble metal catalysts and low yields also hinder its large-scale industrialization. Production