A kind of preparation method of gluconic acid and glucaric acid

Abstract

The invention discloses a preparation method of gluconic acid and glucaric acid in the technical field of organic electrochemical synthesis. It uses the electrocatalytic membrane as the anode and the auxiliary electrode as the cathode, which are respectively connected to the stabilized power supply through wires to form an electrocatalytic membrane reactor; the aqueous glucose solution is used as the reactant, and the inorganic substance is used as the electrolyte. Under the action of an electric field, the electrocatalytic Membrane catalyzed oxidation of glucose to prepare gluconic acid and glucaric acid; at the same time, the peristaltic pump was used to collect the membrane permeate, and the target product was separated from the reaction solution in real time through the permeation of the membrane, and the membrane permeate was separated and purified Obtain gluconic acid and glucaric acid products, and regulate the yield of gluconic acid and glucaric acid by regulating current density and membrane flux. The invention integrates catalytic oxidation and separation functions, can separate the obtained target product from the reaction solution in time, effectively maintains the continuous high efficiency of the electrocatalytic membrane, avoids the occurrence of side reactions, and improves the selectivity of the target product.

Description

technical field [0001] The invention belongs to the technical field of organic electrochemical synthesis, in particular to a preparation method of gluconic acid and glucaric acid. Background technique [0002] Gluconic acid (D-gluconic acid) is an important intermediate of products in chemical industry, food, medicine, light industry and other industries, and has very broad application prospects. At present, the output of gluconic acid in the world exceeds 100,000 tons / year. As a high value-added organic acid, gluconic acid is usually produced by oxidation of glucose, the most abundant monosaccharide in nature. Among them, the fermentation oxidation method is the main route for the industrial preparation of gluconic acid and the reaction equation is as follows: [0003] [0004] The method is to prepare gluconic acid by oxidizing glucose (glucose) with biological enzymes, without adding other oxidants harmful to the environment, and the production cost is also low. How...

AI Technical Summary

Problems solved by technology

Even so, there are still some shortcomings in organic electrochemical synthesis: (1) Electrochemical synthesis cannot separate reactants and products in time after the reaction, which will lead to further oxidation of products and other side reactions, which will eventually affect the reaction. Selectivity and yield of the target product; (2) The reactant can only rely on the electric field to transfer from the solution body to the electrode surface, and then the electrochemical reaction occurs, and the product cannot leave the electrode surface in time after the reaction, thus hindering the new process. The progress of the reaction

However, the inventive method only provides a method for preparing aldehydes or acids by oxidation of small molecule alcohols, and does not involve specific information on electrocatalytic membranes, nor does it involve the regulation of product aldehyde and acid yields during the preparation process

Images