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Laminated electrochemical reactor and application thereof in electrolytic synthesis of succinic acid

A reactor and electrochemical technology, which is applied in stacked electrochemical reactors and its application in the electrolytic synthesis of succinic acid, can solve the problems of high energy consumption, short circuit, low volume utilization, etc., and reach the electrode area Larger, lower tank pressure, lower energy consumption

Active Publication Date: 2021-09-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a laminated electrochemical reactor in order to solve the problems of low volume utilization, high energy consumption, and easy short circuit due to crystallization in the plate-frame tank and fixed-bed electrochemical reactors.

Method used

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  • Laminated electrochemical reactor and application thereof in electrolytic synthesis of succinic acid
  • Laminated electrochemical reactor and application thereof in electrolytic synthesis of succinic acid
  • Laminated electrochemical reactor and application thereof in electrolytic synthesis of succinic acid

Examples

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Embodiment 1

[0065] Deionized water was used to prepare 350g of the original electrolyte. The composition of the original electrolyte was 9.8% maleic anhydride mass concentration and 5% sulfuric acid mass concentration. The cathode material was titanium mesh, and the anode was a titanium-based ruthenium-iridium electrode. The temperature of the electrolyte is controlled at 50°C; the number of cathode stacks is 1; the apertures of the cathode and anode mesh are 2mm and 2.5mm respectively, the porosity is 50%, the thickness of each sheet is 1mm, and the anode current density is 1000A / m 2 , J 阳 / J 阴 = 1:1; the electrolysis electricity is 100% of the theoretical electricity. At the beginning of electrolysis, the prepared electrolyte is fed from the high-level liquid storage tank to the circulation tank, and the electrolyte forms a closed loop of circulation through the magnetic circulation pump. When the thermometer reading is stable at 50°C, the electrolysis starts. After the electrolysis, ...

Embodiment 2

[0067] The electrolysis device, electrolysis method, electrolysis temperature, anode current density, cathode and anode porosity, pore size, single sheet thickness, input power, initial composition and quality of the electrolyte are the same as in Example 1; the number of cathode stacks is 3, and the cathode stack The spacing is 1 mm, J positive / J negative = 3:1; after the electrolysis, the electrolyzed solution is placed in the refrigerator, crystallized at -2°C for 90 minutes, filtered, and dried to obtain 30.12 g of succinic acid crystals, succinic acid The acid purity is 99.43%, the electrolysis voltage is 2.25-2.2.55V, the current efficiency is 74.2%, and the reduction yield of succinic acid is 74.2%.

Embodiment 3

[0069] Electrolysis device, electrolysis method, electrolysis temperature, anode current density, cathode and anode porosity, pore size, monolithic thickness, cathode stack spacing, input electricity, initial composition and quality of electrolyte are the same as embodiment 2; the number of cathode stacks is 5,J 阳 / J 阴 =5:1; After the electrolysis is finished, the electrolytic solution is placed in a refrigerator, crystallized at -2°C for 90 minutes, filtered, and dried to obtain 30.82g of succinic acid crystals, the purity of succinic acid is 99.61%, and the electrolysis voltage is 2.20- 2.48V, the current efficiency is 75.9%, and the reduction yield of succinic acid is 75.9%.

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Abstract

The invention discloses a laminated electrochemical reactor and application thereof in electrolytic synthesis of succinic acid. The laminated electrochemical reactor provided by the invention solves the problems of low volume utilization rate, high energy consumption, easy short circuit caused by crystallization and the like of a plate frame groove and a fixed bed electrochemical reactor used for electrolytic synthesis of succinic acid.

Description

(1) Technical field [0001] The invention relates to a laminated electrochemical reactor and its application in electrolytic synthesis of succinic acid. [0002] (2) Technical background [0003] Succinic acid, also known as succinic acid, has the molecular formula C 4 h 6 o 4 , is an important raw material for organic synthesis, widely used in pharmaceutical synthesis, food processing, daily chemical, polymer synthesis, paint dye modification, surfactant production and other industries. As the output of polybutylene succinate (PBS) continues to increase, the demand for its raw material, succinic acid, continues to rise. [0004] As the core of the organic electrochemical synthesis device, the electrochemical reactor can be divided into three types according to the reactor structure: box-type electrochemical reactor, filter press-type electrochemical reactor, and special-structure electrochemical reactor. Among them, the box type and filter press type electrochemical react...

Claims

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Application Information

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IPC IPC(8): C25B9/13C25B9/17C25B11/031C25B3/07C25B3/25C25B15/02
CPCC25B9/13C25B9/17C25B11/031C25B3/07C25B3/25C25B15/02
Inventor 赵峰鸣赵岚军褚有群陈赵扬
Owner ZHEJIANG UNIV OF TECH
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