Methods and Apparatus for Generating Oxidizing Agents

a technology of oxidizing agent and electrochemical generation, which is applied in the production of electrolytic organic products, electrolysis components, and the nature of treatment water, etc. it can solve the problems of oxidizing anode oxidation damage, hypochlorite producing a relatively bad taste in the treated water, and requiring an experienced operator to dosing, so as to reduce and/or destroy a contaminant, and eliminate oxidative damage to the anode

Inactive Publication Date: 2009-06-18
APPLIED INTELLECTUAL CAPITAL
View PDF15 Cites 39 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]The present invention is directed to various devices and methods of electrochemical generation of oxidative species in an aqueous solution having typically neutral pH using a carbon felt flow-thr

Problems solved by technology

Unfortunately, hypochlorite is also known to react with naturally occurring organic materials, including fulvic and humic acids (e.g., present in soil and sediments in lakes, rivers, and ground water) to form chloromethanes and other toxic byproducts.
Moreover, storage of chlorine gas or solutions of sodium hypochlorite on site for dosing into water streams presents a potential hazard, and dosing requires an at least somewhat experienced operator.
Yet another undesirable effect of chlorination of water is that hypochlorite produces a relatively bad taste in the treated water.
Ozone is chemically more

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Methods and Apparatus for Generating Oxidizing Agents
  • Methods and Apparatus for Generating Oxidizing Agents

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0039]Acid violet 7B, a common triphenylene dye identified by reference to the Color Index as number 42745 was added to deionized water at a concentration of 100 milligrams per liter. Deionized water was made conductive with addition of 2 grams per liter of sodium sulfate. This solution was pumped through the anode compartment described above with the current off. The dye concentration remained the same. A 3.0 amps current was then applied to the cell and the solution pumped through at the rate of 30 ml per minute. Remarkably, the solution was completely decolorized as it exited the cell. The experiment was repeated with Allura Red AC, a common foodstuff dye identified as CI # 16035, and later with Brilliant Green #42040 in the Color Index with the same results.

example 2

[0040]Perchlorobiphenyl (PCB) was extracted from transformer oil by emulsification with a commercially available emulsifying agent LA8 sold by Imperial Chemical Industries Ltd. The PCB extract was added to water producing a solution that was found by analysis to be 12 mg / liter of PCB. The solution was pumped through the anode compartment at no current, and the exiting solution was found to be 11 mg / liter of PCB. When the current was turned on, the solution leaving the anode compartment contained no detectable levels of PCB.

example 3

[0041]DDT (1,1-Bis-(p-chlorophenyl)-2,2,2-trichloroethane) extracted from an old disused spray containing the organophosphate pesticide Methidathion (O,O-Dimethyl S-(5-methoxy-1,3,4-thiadiazolinyl-3-methyl)dithiophosphate) was added to the test solution producing a solution which on analysis gave 53 ppm of DDT. After passing through the anode compartment without electrolysis, the concentration was found to be 54 ppm, while no DDT was detected and after electrolysis of the solution in the electrolytic anode compartment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

Contemplated devices and methods include an electrolytic cell having a cathode and a carbon felt anode, wherein the carbon felt anode is configured as a flow-through anode for an aqueous solution in which a contaminant is dissolved or dispersed. The cell is operated at a current density that promotes formation of oxidizing species in neutral pH to thus destroy the contaminant and at a flow rate sufficient to prevent oxidative damage of the carbon felt.

Description

[0001]This application claims priority to our copending U.S. provisional patent application with the Ser. No. 60 / 697,455, which was filed Jul. 7, 2005.FIELD OF THE INVENTION[0002]The field of the invention is devices and methods for electrochemical generation of oxidizing species, especially as they relate to anodic in situ generation of such species in a fluid.BACKGROUND OF THE INVENTION[0003]Oxidative species, including ozone, hypochlorite, hydrogen peroxide, persulfate, chlorine dioxide, and hydroxyl radicals are frequently used to sterilize water and destroy toxic organic compounds. Among such oxidative species, some exhibit sufficient chemical stability in water to keep the water sterile over relatively long periods, while other oxidative species (e.g., ozone) have relatively short half lives in water, which potentially allows re-infection of previously sterilized water.[0004]Among the most common sterilizing agents, hypochlorite (OCl−) is typically prepared by adding chlorine ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C25B3/02C25B3/23
CPCC02F1/46109C02F1/4672C02F2001/46133C02F2101/306C02F2201/46185C02F2103/325C02F2201/4611C02F2201/46115C02F2201/4618C02F2103/32
Inventor BUTLER, DEANCLARKE, ROBERT LEWIS
Owner APPLIED INTELLECTUAL CAPITAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap