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Chlor-alkail photoelectrolytic cell and method for producing Cl2 and NaOH by using the same

A chlor-alkali electrolysis and electrolysis cell technology, applied in the electrolysis process, electrolysis components, electrodes, etc., can solve the problems of limited wide application and high cost of solar cells.

Inactive Publication Date: 2012-08-01
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high cost of Si solar cells also limits the wide application of this method.

Method used

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  • Chlor-alkail photoelectrolytic cell and method for producing Cl2 and NaOH by using the same
  • Chlor-alkail photoelectrolytic cell and method for producing Cl2 and NaOH by using the same
  • Chlor-alkail photoelectrolytic cell and method for producing Cl2 and NaOH by using the same

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Embodiment 1

[0027] WO 3 Refer to patent No.WO99 / 67181 and WO2005GB01524 for the photoanode preparation process:

[0028] (1) 30mL of sodium tungstate aqueous solution (25mmol) passed through the ion exchange column, and was inoculated with 100mL of alcohol to obtain tungstic acid solution.

[0029] (2) Add 30 grams of PEG300 to the solution obtained in step 1. After stirring, spin-steam at 60°C until the volume of the solution is 25mL, and wait for a colloidal solution.

[0030] (3) The colloidal solution is dispersed on the conductive glass with a glass rod, and heated in the air at 500°C for 30 minutes to obtain a layer of WO 3 film,

[0031] (4) In order to obtain a thicker film, generally repeat step (3) four to six times, the obtained WO 3 The thickness is about 2.5 μm. The pore diameter is about 50nm.

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Abstract

The invention relates to a chlor-alkail photoelectrolytic cell which is cheap and can effectively reduce electrolytic voltage. The invention further provides a method for producing Cl2 and NaOH by using the chlor-alkail photoelectrolytic cell. The chlor-alkail photoelectrolytic cell comprises an electrolytic bath formed by an anodic pool and a cathodic pool, wherein the anode in the anodic pool is made from a photoanode material WO3, the anodic pool is provided with a light-transparent window in order to let sunlight irradiate on the anode, and the anode electrolyte is an acidic saturated saline solution. The chlor-alkail photoelectrolytic cell can be used in chlor-alkali industry for producing Cl2 and NaOH by electrolysis. WO3 is used in the invention as the photoanode material. The anode material is a film with the optimal thickness of 1000-5000 nm. The optimal anode material is a porous structure with the pore structure size of 50-200 nm. The chlor-alkail photoelectrolytic cell has low cost, and can effectively reduce the electrolytic voltage when being used in chlor-alkali industry for producing Cl2 and NaOH by electrolysis.

Description

technical field [0001] The invention relates to a light chlor-alkali electrolytic cell and the production of Cl by using the light chlor-alkali electrolytic cell 2 and NaOH methods. Background technique [0002] The chlor-alkali industry is one of the most basic chemical industries. Its products are not only used in the chemical industry itself, but also widely used in light industry, textile industry, metallurgical industry, petrochemical industry and public utilities. Among them, Cl2 is particularly important, and its output is an important symbol to measure the development level of a country's chemical industry. Global Cl in 2003 2 Production reached 52 million tons. However, the chlor-alkali industry is also one of the largest power-consuming industries in the world, second only to the electrolytic aluminum industry. In the United States, the current electricity consumption of the chlor-alkali industry has exceeded 2% of the total power generation in the United State...

Claims

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Application Information

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IPC IPC(8): C25B1/46C25B9/00C25B9/04C25B11/04
Inventor 邹志刚祝梅罗文俊李朝升
Owner NANJING UNIV
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