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Electrolytic cell and electrodes for use in electrochemical processes

a technology of electrochemical processes and electrolysis cells, applied in the field of electrochemical cells, can solve the problems of significant energy cost reduction, hydrochloric acid production problem, and inability to be dumped into sewers and wastewater outlets

Inactive Publication Date: 2005-01-20
JOVIC VLADIMIR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lack of a market makes hydrochloric acid production problematic in that it cannot be dumped into sewers and wastewater outlets without costly neutralization.
The introduction of DSA into the processes of chlorine, chlorate and hypochlorite production by the electrolysis of brine has led to significant decreases in energy costs.
The use of DSA in this process is not recommended since the titanium substrate undergoes significant corrosion in concentrated HCl at high temperatures and the electrode becomes unusable after a short operating time.
Other materials stable in hydrochloric acid like platinum group metals are excessively expensive.

Method used

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  • Electrolytic cell and electrodes for use in electrochemical processes
  • Electrolytic cell and electrodes for use in electrochemical processes
  • Electrolytic cell and electrodes for use in electrochemical processes

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Embodiment Construction

[0030] The present invention relates to an electrolytic cell with electrodes useful in electrochemical processes. The present invention also relates to cathodes and anodes useful for hydrogen evolution in cells for the electrolysis of hydrochloric acid solutions, alkali metal halide solutions, and alkaline solutions.

[0031] The cathodes of the present invention comprise either a bulk or plasma sprayed electrocatalytic ceramic or intermetallic material of the composition Mn+1AXn (n=1, 2, 3) wherein M is a metal selected from group IIIB, IVB, VB, VIB or VIII of the periodic table of elements and / or a mixture thereof; wherein A is selected from group IIIA, IVA, VA or VIA of the periodic table of elements and / or a mixture thereof; and wherein X is carbon and / or nitrogen. In a preferred embodiment the electrode comprises Ti3SiC2. Any of these materials or their solid solutions may be activated by a thermally prepared coating of a solid solution of TiO2 and RuO2 or TiO2, RuO2 and IrO2, wh...

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Abstract

An electrolytic cell with an anode and cathode for the electrolysis of hydrochloric acid and brine is provided. The anodes and cathodes of the present invention are made of a bulk ceramic or intermetallic material.

Description

FIELD OF INVENTION [0001] This invention relates to electrolytic cells and their use in hydrogen and chlorine evolution. This invention also relates to electrodes for use in electrolytic cells and in hydrogen and chlorine evolution. Methods for electrolysis of hydrochloric acid solutions, alkali metal halide solutions and alkaline solutions in electrolytic cells using the electrodes of this invention are also provided. BACKGROUND [0002] In certain industrial operations hydrochloric acid is formed as a by-product of chlorination. There is usually no immediate market for the hydrochloric acid. The lack of a market makes hydrochloric acid production problematic in that it cannot be dumped into sewers and wastewater outlets without costly neutralization. It has been customary in industry to utilize electrolysis of hydrochloric acid to overcome disposal issues. Electrolysis of brines and hydrochloric acid are completed within an electrolytic cell with an anode and a cathode. An electrica...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C25B1/26C25B1/46C25B11/04
CPCC25B1/26C25B1/46C25B11/04C25B11/0484C25B11/0442C25B11/0478C25B11/0426C25B11/069C25B11/073C25B11/093C25B11/091
Inventor JOVIC, VLADIMIRBARSOUM, MICHEL
Owner JOVIC VLADIMIR
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