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Method of preparing ozone by low-voltage electrolysis method

A low-voltage electrolysis and ozone technology, applied in the electrolysis process, electrolysis components, etc., can solve the problems of low ozone concentration, inconvenient movement, and low ozone output, and achieve the effects of high ozone concentration, low production cost and convenient operation.

Inactive Publication Date: 2007-10-17
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method mainly has problems such as high voltage between the two electrodes, low ozone concentration, large-scale production equipment, inconvenient movement, and complicated operation. harm
The ultraviolet radiation method is to generate ozone from air or oxygen under ultraviolet radiation. This method has low ozone production, complex structure, and difficult wavelength control. It is not suitable for large-scale preparation of ozone, and is only suitable for places that generate a small amount of ozone.

Method used

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  • Method of preparing ozone by low-voltage electrolysis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7

[0028] In a diaphragmless electrolyzer, a neutral phosphate solution is added as the electrolyte, where K 2 HPO 4 with KH 2 PO 4 The concentrations are 2.0mol / L and 1.0mol / L respectively, and the stainless steel electrode is used as the cathode (with an area of ​​15dm 2 ), the titanium matrix fluorine-containing lead dioxide electrode is the anode (with an area of ​​10dm 2 ), using 100, 400, 600, 800, 1000, 1500, 2000A / m respectively 2 The current density of the current density is determined by the iodometric method to measure the ozone flow rate. During electrolysis, the electrolyte and the electrode are forced to cool the electrolyte with a refrigeration device. result.

[0029] Current densityA / m 2

Embodiment 8～13

[0031] In the electrolyzer with example 1~7, adopt identical electrolytic solution, embodiment 8~10 is anode (area is 10dm2) with titanium substrate fluorine-containing lead dioxide electrode 2 ), with nickel alloy, graphite, and lead alloy as cathodes respectively (with an area of ​​15dm 2 ); Embodiment 11~13 is negative electrode with graphite, is anode respectively with the fluorine-containing lead dioxide composite electrode of titanium matrix, graphite matrix and ceramic matrix, all adopts the electric current electrolysis of 80A, measures the ozone flow that produces with iodometric method, During electrolysis, the electrolyte and electrodes were forcibly cooled by a refrigeration device, and the temperature of the electrolyte was controlled between 5 and 35°C to prepare ozone by electrolysis. The results shown in Table 2 can be obtained.

[0032] Embodiment 8~10

Embodiment 14～15

[0034] In the non-diaphragm type electrolyzer, add the selenic acid of the neutral phosphate composite solution such as embodiment 1 and 2.0mol / L respectively as electrolytic solution, graphite electrode is negative electrode (area is 5dm 2 ), the ceramic matrix fluorine-containing lead dioxide electrode is the anode (with an area of ​​2.5dm 2 ), using 20A current electrolysis. The ozone flow rate is measured by the iodometric method. During electrolysis, the electrolyte and the electrode are cooled by water flow, and the temperature of the electrolyte is controlled between 5 and 35°C for electrolysis. The ozone flow rate obtained is 4.45g / h and 1.15g / h respectively. h.

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Abstract

The present invention relates to a process for preparing ozone through a low pressure electrolytic method. In an electrolytic tank of diaphragm type or non-diaphragm type, a neutral or acidic electrolysing solution is added, a non-corrodible steel electrode, a nickel alloy electrode, a lead alloy electrode or a graphitic electrode is selected as the cathode, a fluorine-containing lead dioxide electrode is selected as the anode, an electric current density of 100-2000 A / m2 and a tank voltage of 3.0-6.0 V are adopted, and the temperature of the electrolysing solution is controlled at 5-35 DEG C, then ozone is obtained after energization for an electroanalysis. The substrate of said fluorine-containing lead dioxide electrode is titanium, graphite or ceramics. Said ozone generating device for preparing ozone in accordance with the present invention is characterized by its simple structure, convenient operations, superior performances, capability of operations at normal temperature and pressure, low energy consumption, high ozone concentration generated, and avoidance to generate oxynitrides harmful to persons and entironment during electrolysises, and then is a green environmental protection equipment. According to actual needs, said method is capable of being extensively used for generating ozone in fields such as disinfection, sterilization, odor treatment, fresh-keeping, air purification, preparation of pure water, wastewater treatment, organic synthesis and the like.

Description

(1) Technical field [0001] The invention relates to a method for preparing ozone by a low-voltage electrolysis method. (2) Background technology [0002] Ozone is an allotrope of oxygen and has a strong oxidizing ability. It can be used as a strong oxidizing agent, disinfectant, refining agent, catalyst, etc. It has been widely used in water treatment, chemical industry, petroleum, textile, food and spices, and pharmaceuticals. and other industrial sectors. The application of ozone in drinking water treatment is more superior than chlorine gas. Tap water disinfected with chlorine gas will produce halogenated organic substances harmful to human body (that is, secondary pollution), while the water treated with ozone is oxygen-enriched water, which will not cause secondary pollution. pollute. In addition, because ozone has a series of advantages such as strong oxidizing ability, fast reaction speed, convenient use and no secondary pollution, it can degrade many organic pollut...

Claims

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Application Information

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IPC IPC(8): C25B1/13
Inventor 马淳安赵峰鸣童少平盛江峰
Owner ZHEJIANG UNIV OF TECH
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