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Graphite-filled multipole electrolytic synthesis device with heat exchange function for succinic acid

An electrolytic synthesis and bipolar technology, applied in the electrolysis process, electrolysis components, electrolysis organic production, etc., can solve the problems of easy corrosion of anode lead alloy materials, large investment in iridium-titanium-coated anodes, and high electrolyte temperature, and achieve remarkable results. Economic benefit, lower investment cost, good heat exchange effect

Pending Publication Date: 2021-01-12
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the practical problems of the existing industrialized electrolytic synthesis of succinic acid anode lead alloy material which is easy to corrode, large investment in iridium-titanium coated anode, high electrolyte temperature and difficult to control, etc., and proposes an industrialized electrolytic production with heat exchange Succinic acid bipolar electrolysis device has the characteristics of self-contained heat exchange, low investment, low power consumption, long electrode life and high product quality, especially suitable for the production of large-scale electrolytic synthesis of succinic acid above 10,000 tons

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  • Graphite-filled multipole electrolytic synthesis device with heat exchange function for succinic acid
  • Graphite-filled multipole electrolytic synthesis device with heat exchange function for succinic acid
  • Graphite-filled multipole electrolytic synthesis device with heat exchange function for succinic acid

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Effect test

Embodiment 1

[0028] refer to Figure 1-2 schematic diagram. An industrial self-contained heat-exchanging graphite-filled bipolar type electrolytic synthesis device for succinic acid, the device contains several bipolar electrodes 3, and the bipolar electrodes 3 are placed on the plastic backing plate 4 at the bottom of the electrolytic cell body 1 , the bipolar electrodes 3 at both ends are closely attached to the corresponding side walls 2 of the electrolytic cell, one is connected to the positive pole of the power supply, and the other is connected to the negative pole of the power supply to form a plate and frame bipolar electrolysis device; any bipolar electrode 3 on both sides The lead alloy card edge 15 is embedded in the groove of the two side plates of the electrolytic cell body 1, fixed inside the electrolytic cell body 1, and the interior of the electrolytic cell body 1 is divided into several unit electrolytic cells, any two adjacent A unit electrolytic cell cavity is formed be...

Embodiment 2-3

[0045] By the method of embodiment 1, get two electrolyzers wherein as experiment electrolyzer. Replace the filled graphite with block graphite particles or large particle graphite balls respectively, and the cooling water flow rate is 6m 3 / h, the cooling water inlet / outlet temperature is 32°C / 37°C, the electrolyte temperature is controlled at 70±2°C, and 10 batches are run. The statistical test results are calculated per ton of succinic acid products as per 100kg of succinic acid products. The results are shown in Table 2.

[0046] Table 2 Effect of graphite filling materials on the synthesis of succinic acid by bipolar electrolysis device

[0047]

[0048]

[0049] The results in Table 2 show that the filling of graphite particles with different shapes has little effect on the electrolytic synthesis of succinic acid.

Embodiment 4-11

[0051] According to the electrolysis device of embodiment 1, get two electrolyzers wherein as experimental electrolysis device, adjust electrolyte temperature and current density, run 10 batches, convert every ton of product statistical test result by 100kg succinic acid product, the result is as shown in the table 3.

[0052] Table 3 Effects of different controls and currents of bipolar electrolysis devices on the industrial synthesis of succinic acid

[0053]

[0054] The results in Table 3 show that the bipolar electrolysis device with built-in heat exchange can control the temperature well, and the electrode loss per ton of succinic acid graphite is less than 10kg, which can be adapted to large-scale production, especially to work under electrolysis conditions exceeding 70 °C , and can significantly reduce power consumption and loss of anode materials, it is a production device that can be used for 10,000-ton electrolytic synthesis of succinic acid.

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Abstract

The invention belongs to the field of electrolyzers, and discloses a graphite-filled multipole electrolytic synthesis device with a heat exchange function for succinic acid. A multipole electrode is composed of a lead alloy frame body, a lead alloy basket, filling graphite particles and a cooling system. A working electrode (cathode) is arranged on one side surface of the lead alloy frame body; alead alloy basket is welded on the other side of the lead alloy frame body and is filled with graphite particles (anodes); and cooling water is introduced into a cavity of the lead alloy frame body for heat exchange, and the temperature of electrolyte is regulated and controlled to be stable. The device is suitable for large-scale industrial electrolytic synthesis of succinic acid with annual output exceeding 500 tons, and has the application range that the electrolyte temperature is 15-85 DEG C and the current density is 100-1000 A / m<2>; the loss of the graphite anode is 8-10kg for every oneton of succinic acid, and the power consumption is less than 2600kwh for every one ton of succinic acid; the electrode investment and the electrode consumption of a lead alloy anode and an iridium-titanium coating anode in the current industry can be greatly reduced, and the method can be applied to the industry of electrolytic synthesis of succinic acid with the scale of ten thousand tons or more.

Description

technical field [0001] The invention belongs to the field of electrolysis devices, and relates to an electrode and a device for electrolyzing and synthesizing succinic acid without a diaphragm, in particular to a bipolar electrolytic synthesis device for electrolytically synthesizing succinic acid with self-contained heat exchange graphite. Background technique [0002] Succinic acid, commonly known as succinic acid, is an important intermediate in the synthesis of pharmaceuticals and fine chemicals, and is widely used in synthetic plastics, rubber, medicine, protective coatings and other industries. Succinic acid has most typical reactions of dibasic acids, such as halogenation, dehydration, esterification, polycondensation, iodination, acylation, oxidation, reduction, etc. Using succinic acid as a substrate, a series of monoesters and diesters can be prepared. For example, succinic acid is esterified with starch, cellulose and polyols; succinic acid and 1,4-butanediol can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/07C25B3/25C25B9/70C25B11/02C25B11/04C25B9/40
CPCC25B11/02C25B11/04
Inventor 甘永平张允岚张文魁黄辉梁初夏阳张俊贺馨平
Owner ZHEJIANG UNIV OF TECH
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