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Method and reaction device for electrochemical reduction of tin tetrachloride

An electrochemical reaction and chemical reaction technology, applied in the field of electrochemical engineering, can solve the problems of poor stability, nickel chloride pollution, increased energy consumption, etc.

Pending Publication Date: 2022-04-05
TAN KAH KEE INNOVATION LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Some related technologies use a method of electroreducing tin tetrachloride using a diaphragmless electrolytic cell, but this method uses metallic nickel as the cathode, which gradually dissolves when it reacts with hydrochloric acid, and has poor stability, and the nickel chloride generated simultaneously enters the reaction solution and causes pollution
In addition, the tin dichloride produced by the reduction of the cathode in the diaphragmless electrolyzer gradually diffuses to the anode and is re-oxidized to tin tetrachloride, resulting in a significant decrease in the reaction current efficiency and an increase in energy consumption.

Method used

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  • Method and reaction device for electrochemical reduction of tin tetrachloride
  • Method and reaction device for electrochemical reduction of tin tetrachloride
  • Method and reaction device for electrochemical reduction of tin tetrachloride

Examples

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Embodiment 1

[0092] figure 1 A schematic diagram of the electrochemical reaction device of Example 1 is shown. The electrochemical reaction device includes:

[0093] An anode assembly 100, the anode assembly 100 includes a first electrode 101 and a first pole plate 102, the surface of the first pole plate 102 facing the first electrode 101 is provided with a first flow channel 104 for distributing oxide to be oxidized, a first flow channel inlet 151 and the first channel outlet 152, the first electrode 101 is configured to be in contact with the oxide to be oxidized;

[0094] The cathode assembly 200, the cathode assembly 200 includes a second electrode 201 and a second pole plate 202, the surface of the second pole plate 202 facing the second electrode is provided with a second flow channel 106 for distributing the substance to be reduced, a second flow channel an inlet 251 and a second channel outlet 252, the second electrode 201 is configured to be in contact with the substance to be ...

Embodiment 2

[0121] figure 1 A schematic diagram of the electrochemical reaction device of Example 2 is shown. The electrochemical reaction device includes:

[0122] An anode assembly 100, the anode assembly 100 includes a first electrode 101 and a first pole plate 102, the surface of the first pole plate 102 facing the first electrode 101 is provided with a first flow channel 104 for distributing oxide to be oxidized, a first flow channel inlet 151 and the first channel outlet 152, the first electrode 101 is configured to be in contact with the oxide to be oxidized;

[0123] The cathode assembly 200, the cathode assembly 200 includes a second electrode 201 and a second pole plate 202, the surface of the second pole plate 202 facing the second electrode is provided with a second flow channel 106 for distributing the substance to be reduced, a second flow channel an inlet 251 and a second channel outlet 252, the second electrode 201 is configured to be in contact with the substance to be ...

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Abstract

The invention provides a method and a reaction device for electrochemical reduction of tin tetrachloride. The electrochemical reaction device includes: an anode assembly including a first electrode configured to contact an oxide to be oxidized; the cathode assembly comprises a second electrode, and the second electrode is configured to be in contact with an object to be reduced; the proton exchange membrane is arranged between the cathode assembly and the anode assembly; and a power supply configured to apply a positive voltage between the anode assembly and the cathode assembly.

Description

technical field [0001] The invention belongs to the field of electrochemical engineering, and in particular relates to a method and a reaction device for electrochemically reducing tin tetrachloride. Background technique [0002] Phenylhydrazine compounds are important intermediates in organic synthesis, widely used in dyes, pesticides, medicine and other fields. At present, the classic synthetic routes of phenylhydrazine and its derivatives are as follows: [0003] The diazotization reaction of aniline and sodium nitrite produces diazonium salt, and then uses a reducing agent such as tin dichloride or sodium sulfite to reduce the diazonium salt to phenylhydrazine hydrochloride under acidic conditions. The reduction of diazonium salt by tin dichloride has high selectivity and yield, and is widely used in industry. However, while tin dichloride is reducing the diazonium salt, it is oxidized to tin tetrachloride, which exists in large quantities in the waste liquid after the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/26C25B1/50C25B9/19
CPCC25B1/26C25B9/19C25B1/50
Inventor 郑南峰胡程奕陶华冰陶勇冰游文韬
Owner TAN KAH KEE INNOVATION LAB