Method for producing butanedioic acid based on serial overflowing method of bipolar membrane electrolytic cell

A technology of electrolytic cells and bipolar membranes, applied in electrolytic organic production, electrolytic processes, electrolytic components, etc., can solve problems such as heavy workload, unfavorable for safe production of rectifiers, troublesome operation, etc., to reduce IR drop, pole distance Effects of small, mild preparation conditions

Inactive Publication Date: 2013-01-30
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Turning on and off the power supply in each batch is not only not conducive to the safe production of the rectifier, but also troublesome to operate and heavy workload

Method used

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  • Method for producing butanedioic acid based on serial overflowing method of bipolar membrane electrolytic cell
  • Method for producing butanedioic acid based on serial overflowing method of bipolar membrane electrolytic cell
  • Method for producing butanedioic acid based on serial overflowing method of bipolar membrane electrolytic cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of bipolar membranes.

[0042] Dissolve 5g of SBS in 40mL of toluene and dioxane mixed solution (V / V=3 / 1), add 10-60% freshly distilled acrylic acid (AA) and 1.0% BPO (benzoyl peroxide, with AA mass count). In a nitrogen atmosphere, react at a constant temperature of 80° C. for 3 hours, and then stop the reaction by cooling down to obtain the SBS-g-PAA cation exchange membrane layer emulsion.

[0043]5g of SBS was dissolved in 20mL of toluene and 20mL of dioxane mixed solution, and 3g of N,N-dimethylaminoethyl acrylate (DMAEMA) and 1.0% BPO (based on the mass of DMAEMA) were added. In a nitrogen atmosphere, react at a constant temperature of 80°C for 3h. The SBS-g-DMAEMA graft copolymer containing tertiary amine groups is obtained, which is the SBS-g-DMAEMA anion exchange membrane layer emulsion.

[0044] Cast the SBS-g-PAA cation exchange membrane layer emulsion on flat glass, and then cover it with SBS-g-DMAEMA anion exchange membrane layer emulsion whe...

Embodiment 2

[0054] The preparation of the bipolar membrane is the same as in Example 1.

[0055] Preparation of succinic acid

[0056] Weigh 11g of maleic anhydride and dissolve it in 100mL of water, adjust the pH to 1 with 1mol of sulfuric acid, and add it to the electrolytic cell after it dissolves. Electrolyte temperature 35°C, current density 100mA cm -2 , the total current is 2A, and ten bipolar membrane monomer electrolyzers are connected in series. The last collection tank collects the electrolyte to obtain the product succinic acid after distillation. During the electrolysis process, the electrolyte raw material tank in the cathodic chamber continuously supplies electrolyte to the cathodic chamber of the uppermost bipolar membrane monomer electrolyzer, and the electrolyte water supplement tank in the anode chamber continuously replenishes water to each anode chamber.

[0057] The apparent yield of succinic acid is 112%, the apparent current efficiency is 105%; the average elect...

Embodiment 3

[0059] The preparation of the bipolar membrane is the same as in Example 1.

[0060] Preparation of succinic acid

[0061] Weigh 12g of maleic anhydride, dissolve it in 100mL of water, adjust to pH=1 with 1mol of sulfuric acid, and add it to the electrolytic cell after it dissolves. Electrolyte temperature 45°C, current density 25mA cm -2 , the total current is 2A, and ten bipolar membrane monomer electrolyzers are connected in series. The last collection tank collects the electrolyte to obtain the product succinic acid after distillation. During the electrolysis process, the electrolyte raw material tank in the cathodic chamber continuously supplies electrolyte to the cathodic chamber of the uppermost bipolar membrane monomer electrolyzer, and the electrolyte water supplement tank in the anode chamber continuously replenishes water to each anode chamber.

[0062] The apparent yield of succinic acid is 113%, the apparent current efficiency is 113%, and the average electroly...

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Abstract

The invention relates to a method for producing butanedioic acid based on a serial overflowing method of a bipolar membrane electrolytic cell. According to the technical scheme, (1) a serial overflowing bipolar membrane electrolytic cell set is composed of a cathode chamber electrolyte raw material cell, an anode chamber electrolyte moisture replenishing cell, monomer electrolytic cells in equal size and a collecting cell, wherein the monomer electrolytic cells are arrayed in a ladder form in turn and the collecting cell is located under the side of the bottom bipolar membrane monomer electrolytic cell, (2) the cathode chamber electrolyte prepared in advance is injected into a cathode chamber of the electrolytic cell according to the arrayed mode of the serial overflowing bipolar membrane electrolytic cell set, and meanwhile, the electrolyte of the anode chamber is fully filled. The electrolysis is started after electrifying and an end product of the butanedioic acid is prepared. According to the method provided by the invention, the preparation condition is mild, the production is performed within the temperature scope of room temperature to 65 DEG C, and the current efficiency is above 90%.

Description

technical field [0001] The invention relates to the field of electrochemical synthesis, in particular to a method for producing succinic acid by a series overflow method based on bipolar membrane electrolyzers. Background technique [0002] The non-diaphragm method is because the succinic acid generated at the cathode will have side reactions such as polymerization on the anode. When the succinic acid product is used as a medical hygiene and food additive, there is a potential product safety risk. The anode potential must be strictly controlled and the operation bring inconvenience. [0003] The main reaction of electrochemically producing succinic acid is that maleic anhydride is hydrolyzed into maleic acid in the cathode chamber, and then electro-reduced on the cathode to generate succinic acid. The reaction equation is as follows: [0004] [0005] It can be seen from formula 2 that the reduction of maleic acid to succinic acid in the cathode chamber should be complet...

Claims

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Application Information

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IPC IPC(8): C25B3/04C25B9/18C25B3/25
Inventor 郑曦陈震陈日耀陈晓
Owner FUJIAN NORMAL UNIV
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