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Arsine and chlorine combined electrolysis device and arsine and chlorine combined electrolysis method using same

An electrolysis device, chlorine technology, applied in the electrolysis process, electrolysis components, electrodes and other directions, can solve the problems of high cost, difficult operation, cumbersome process, etc., and achieve the effect of improving the reliability of safe operation

Pending Publication Date: 2021-02-02
紫石能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing methods for preparing arsine and chlorine gas have problems such as cumbersome process, difficult operation, high cost, and unfavorable for large-scale production.

Method used

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  • Arsine and chlorine combined electrolysis device and arsine and chlorine combined electrolysis method using same
  • Arsine and chlorine combined electrolysis device and arsine and chlorine combined electrolysis method using same
  • Arsine and chlorine combined electrolysis device and arsine and chlorine combined electrolysis method using same

Examples

Experimental program
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Effect test

Embodiment 1

[0097] This embodiment provides an arsenic and chlorine combined electrolysis device, the structural schematic diagram of which is as follows figure 1 shown. The device comprises a cathode electrolyzer 1, an anode electrolyzer 2, a membrane fixing frame 3, an anode membrane electrode 4, a cationic semipermeable membrane 5, an arsenic cathode 6, a catholyte feed pipe 7, a catholyte outlet pipe 8, an arsenic Alkane discharge pipe 9, anolyte feed pipe 10, anolyte discharge pipe 11, chlorine gas discharge pipe 12, anode cable 13, cathode cable 14, anolyte storage tank 15, anolyte constant temperature cooler 16 , catholyte crystallization tank 17, catholyte storage tank 18, crystallization liquid outlet pipe 19, crystallization out cooling machine 20, catholyte constant temperature cooling machine 21, first circulation pump 221 and second circulation pump 222 and seal twenty three.

[0098] An anodic membrane electrode 4 is arranged in the anode electrolysis cell 2 , and the anod...

Embodiment 2

[0116] The arsine and chlorine combined electrolysis device provided in this embodiment are all the same as the arsine and chlorine combined electrolysis device provided in Example 1 except that the anode membrane electrode 4 is a titanium mesh electrode coated with an iridium oxide catalyst on the surface. same.

[0117] This embodiment also provides a method for using the device to perform combined electrolysis of arsenic and chlorine gas. In this method, except that the anolyte solution is a high-purity sodium chloride solution with a concentration of 15 wt%, the temperature of the anode electrolysis is 75° C., and the temperature of the cathode electrolysis is also It is 75 ℃, correspondingly adjust the anolyte in the anolyte storage tank 15 and the catholyte temperature in the catholyte storage tank 18 to be 75 ℃, adjust the crystallization temperature of the catholyte crystallization tank 17 to be outside 5 ℃ , other operations are the same as the method of embodiment 1....

Embodiment 3

[0120] This embodiment provides a method for utilizing the device of Embodiment 1 to carry out combined electrolysis of arsenic and chlorine gas. In this method, except that the anolyte solution is a high-purity sodium chloride solution with a concentration of 25 wt%, the temperature of the anode electrolysis is 85°C, and the temperature of the cathode electrolysis is 85°C. The temperature of the temperature is also 85 ℃, correspondingly adjust the anolyte in the anolyte storage tank 15 and the catholyte temperature in the catholyte storage tank 18 to be 85 ℃, adjust the crystallization temperature of the catholyte crystallization tank 17 to be 15 Except ℃, other operations are all the same as the method of embodiment 1.

[0121] The purity of arsine, the purity of chlorine and the conversion rate of elemental arsenic in the arsenic electrode obtained by the method of this embodiment are shown in Table 1.

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Abstract

The invention provides an arsine and chlorine combined electrolysis device and an arsine and chlorine combined electrolysis method using the same. The device comprises an electrolytic cell, a cation semipermeable membrane is arranged in the electrolytic cell, the electrolytic cell is divided into an anode electrolytic cell and a cathode electrolytic cell by the cation semipermeable membrane, an anode membrane electrode is arranged in the anode electrolytic cell, and the anode electrolytic cell is communicated with an anode electrolyte feeding pipe, an anode electrolyte discharging pipe and a chlorine discharging pipe; an arsenic cathode is arranged in the cathode electrolytic cell, and the cathode electrolytic cell is communicated with a catholyte feeding pipe, a catholyte discharging pipeand an arsine discharging pipe. The method comprises the following steps: electrolyzing an anolyte containing chlorine salt by using the anode membrane electrode in the anode electrolytic cell to obtain chlorine gas, and enabling the cations in the chlorine salt to enter the cathode electrolytic cell through the cation semipermeable membrane; meanwhile, electrolyzing water in the catholyte by using the arsenic cathode in the cathode electrolytic cell to obtain arsine. The device provided by the invention realizes simultaneous production of high-purity arsine and high-purity chlorine.

Description

technical field [0001] The invention belongs to the field of high-purity electronic gas preparation, and relates to an arsine and chlorine combined production device and production method, in particular to an arsine and chlorine combined electrolysis device and an arsine and chlorine combined electrolysis method using the same. Background technique [0002] Today, with the rapid development of semiconductor industry, solar energy industry, LED industry, flat panel display industry and optical fiber industry, the process of high-purity arsine gas and high-purity chlorine gas is more and more widely used. High-purity arsine gas and high-purity chlorine gas are both highly Toxic gas, high-purity arsine or flammable and explosive gas. The high-purity arsine gas produced by ordinary chemical synthesis has high impurity content, and the process of removing gas impurities and purifying arsine is a big problem. The electrolysis method directly uses high-purity elemental arsenic or h...

Claims

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Application Information

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IPC IPC(8): C25B1/46C25B1/01C25B9/23C25B11/02C25B11/052C25B15/08
CPCC25B1/46C25B11/02C25B15/08
Inventor 赵青松宁红锋闫东升南建辉张少雷
Owner 紫石能源有限公司
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