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Process and method for recovery of halogens

A halogen and halide technology, applied in the field of corresponding halogen solution or solid deposit collection, can solve the problems of heat generation, consumption of electrolysis, etc.

Inactive Publication Date: 2008-04-09
IODINE TECH AUSTRALIA PTY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However if such tri-iodide materials are allowed to reach the counter electrode, as is the case in many prior art process and cell designs, they are easily re-reduced to iodide, creating an ineffective cycle in which electrolysis, without any useful result except heat

Method used

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  • Process and method for recovery of halogens
  • Process and method for recovery of halogens
  • Process and method for recovery of halogens

Examples

Experimental program
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Effect test

example 1

[0157] For a 100mg / ml iodide solution, the electrolytic extraction potential added to the stainless steel electrode is determined by cyclic voltammetry scanning of the electrode in the solution. To this end, the potential is increased from 0 volts to 2 volts at a rate of 100 mv / s, and the current is measured at the same time. The resulting cyclic voltammogram is as image 3Shown. Its trajectory shows the characteristic wave of current. The electrolytic extraction process takes place at the apex of this wave. The best potential can be selected from this trajectory, that is, the lowest potential when the current reaches or approaches the maximum. In this example it is 1.5v.

example 2

[0159] The following example illustrates one method of obtaining electro-deposited iodine (EDI). The electrolytic extraction of iodine is accomplished with a three-electrode system. A stainless steel working (Grade18 / 8) electrode consists of three separate 40mm discs mounted on the glaze. The reference electrode is a commodity Ag / Ag + The electrode and the counter electrode are a stainless steel disc. The electrolytic cell consists of a 120ml glass container, and there is a sinter with a porosity of 5 at the bottom. Put 100ml of 0.1M sulfuric acid in 100mgml -1 The potassium iodide solution is added to the electrolytic cell. The solution was stirred with magnetic stirring beads coated with Teflon (polytetrafluoroethylene). Then put the electrolytic cell into a large pan, which contains about one liter of 0.1MH 2 SO 4 . Then the anode electrode and the reference electrode are immersed in an acidic potassium iodide solution and the counter electrode is placed in an outer container f...

example 3

[0161] Use the same method as in Example 2, but use Nafian membrane instead of glass glaze as a separator.

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Abstract

An apparatus for the recovery of a halogen or pseudohalogens from a halide compound in solution; wherein the apparatus includes; an electrochemical cell including, an electrode assembly including at least a first and second electrodes in communication with a controller for providing a current to at least two of said electrodes; wherein, upon delivery of a predetermined voltage, said halide compound is oxidised at one or more said electrodes to form a halogen corresponding to said halide in solution whereupon said halogen is deposited on said one or more electrode upon completion of oxidation.

Description

Technical field [0001] The present invention relates to a process and method for recovering halogen from a solution containing a corresponding halide, such as, but not limited to, recovering iodine or bromine from a solution of iodide or bromide. The present invention also relates to an electrolytic extraction process and method to recover halogens and pseudo-halogens, and more specifically, to a method for the oxidation of the halide contained on the electrode and the collection of the corresponding halogen solution or solid deposit. The present invention also relates to the use of the above-mentioned recycling process and method to produce a high surface area quickly dissolving iodine substance for, but not limited to, applications such as water purification, food sanitation treatment with water, and water nets. Background technique [0002] Halogens are used in many industrial applications, including the disinfection of water used in food cleaning processes and water supply de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/24C01B7/14C25B11/04C02F1/467C02F1/76C25B9/12C25B13/00C25B15/00
CPCC02F2303/185C01B7/14C02F1/4672C25B1/24
Inventor 道格拉斯·迈克法莱恩彼得·A.·纽曼
Owner IODINE TECH AUSTRALIA PTY LTD
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