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Electrolytic apparatus, methods purification of aqueous solutions and synthesis of chemicals

An electrolysis device and purification method technology, applied in chemical instruments and methods, electrolysis components, electrolysis process, etc., can solve the problems of inability to reduce the concentration of pollutants, decolorization, lack of sufficient industrial wastewater, etc., and achieve low update and maintenance costs, The effect of complete destruction and complete mineralization

Inactive Publication Date: 2002-01-02
ZAPPI WATER PURIFICATION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, electrochemical methods are unable to reduce the concentration of pollutants to the level allowed by government regulations, so the solution cannot be effectively treated
Therefore, this electrochemical method is not sufficient to consistently achieve substantially complete mineralization of organic pollutants and lacks the ability to decolorize industrial wastewater sufficiently to comply with government regulations

Method used

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  • Electrolytic apparatus, methods purification of aqueous solutions and synthesis of chemicals
  • Electrolytic apparatus, methods purification of aqueous solutions and synthesis of chemicals
  • Electrolytic apparatus, methods purification of aqueous solutions and synthesis of chemicals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0104] A monopolar electrochemical cell with an open structure was set up with an electrode assembly comprising 316 stainless steel end plates with a diameter of 12.065 cm and a thickness of 0.95 cm. A central cathode consisting of 316 stainless steel mesh with 7.8 x 7.8 openings / linear centimeter, 0.046 cm wire diameter, 0.081 cm opening width, and 41% open area was also incorporated into the electrode set. The anode consisted of two platinized niobium electrodes manufactured by Blake Vincent Metals, Rhode Island, USA. An anode electrodeposited on both sides of the niobium substrate, having a thickness of 635 microns, was drawn into a mesh having a thickness of about 0.51 cm and a diamond-shaped gap of 0.159 cm. Separators between adjacent electrodes were fabricated from polyethylene mesh with 8.27 x 8.27 openings / linear centimeter, 0.0398 cm wire diameter, 0.084 cm opening width, and 46% open area at Cree, Ohio, USA Supplied by McMaster-Carr of Forlan. The gap between the ...

Embodiment II

[0106] To demonstrate decolorization in textile industry effluent, a 1 liter solution containing 0.1 g of the textile dye Remazol was prepared in tap water TM Black B (Hoechst Celanese company), 0.1 gram surfactant Tergitol TM 15-S-5 (Union Carbide) and 1 g of sodium chloride.

[0107] The composition of the test solution was similar to typical effluents from textile dyeing and finishing processes, where even a very low concentration of Remazol Black imparted a very dark color to the solution. Remazol Black is a particularly difficult textile dye to process. So far, other methods used to treat Remazol Black, such as by the action of ozone or the use of hypochlorite bleach, have failed to produce the desired depigmentation effect.

[0108] In the monopolar electrolyzer installed in the embodiment 1, with 25 ampere constant currents, electrolyze the above-mentioned solution containing Remazol Black. The cell voltage was about 25 volts, and the temperature of the solution re...

Embodiment III

[0110] Further tests were carried out to show the decontamination effect of groundwater. Humic acids are typical pollutants in groundwater produced by the decomposition of plant matter. Water containing humic acid, even in low concentrations, is dark in color, and the color is difficult to remove.

[0111] A dark brown solution in tap water was prepared containing 30 ppm of the sodium salt of humic acid (Aldrich) without additives to increase the conductivity of the solution. The solution was circulated through a monopolar electrochemical cell similar to that used in Example 1, but equipped with only one anode and two cathodes. A constant current of 10 amps was applied for 2.5 hours. The cell voltage was 24-25 volts, and the temperature reached 58°C. At the end of the test, the solution was completely clear, indicating effective destruction of humic acids.

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Abstract

Electropurification of contaminated aqueous media, such as ground water and wastewater from industrial manufacturing facilities like paper mills, food processing plants and textile mills, is readily purified, decolorized and sterilized by improved, more economic open configuration electrolysis cell designs with electrodes comprising a plurality of conductive porous elements in electrical contact with one another. The cells may be divided or undivided, and connected in monopolar or bipolar configuration. When coupled with very narrow capillary gap electrodes more economic operation, particularly when treating solutions of relatively low conductivity is assured. The novel cell design is also useful in the electrosynthesis of chemicals, both organic and inorganic types, such as hypochlorite bleaches and other oxygenated species.

Description

technical field [0001] The present invention relates generally to the purification of aqueous solutions and to the preparation of useful chemical products, and more particularly to electrochemical methods and electrochemical processes for the electro-purification of drinking water, industrial waste water and contaminated groundwater and the electrochemistry of organic and inorganic chemicals in useful products A more efficient, economical and safer electrolysis device for synthesis (electrosynthesis). Background of the invention [0002] Wastewater is a useful resource in cities and towns with increasing populations and limited water supplies. In addition to reducing the pressure on limited freshwater supplies, wastewater reuse can also improve the quality of streams and lakes by reducing the amount of sewage they receive. Wastewater can be recycled and reused for irrigation of crops and scenic spots, replenishment of groundwater, or for recreational purposes. [0003] Pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46C02F1/42C02F1/461C02F1/467C25B9/00
CPCC02F2001/46133C02F2001/46157C02F1/46104C02F1/46109C02F1/4674C02F2103/30C02F2101/163C02F2305/026C02F1/42C02F2201/4611C02F2303/04C02F2001/46128C02F2201/46155C02F2201/46115C02F1/4672C02F1/4676
Inventor 吉列尔莫·丹尼尔·萨比诺曼·L·温伯格
Owner ZAPPI WATER PURIFICATION SYST
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