Process for the production of high purity aqueous alkali hydroxide solution
CA 1084866 A · Owner: Asahi Kasei Kogyo Kabushiki Kaisha · Inventors: Takemura, Reiji; Seko, Maomi; Ogawa, Shinsaku
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the electrolysis of an aqueous sodium chloride solution in an electrolytic cell comprising an anode compartment and a cathode compartment separated by a cation exchange membrane to obtain an aqueous sodium hydroxide solution having a sodium chloride content of up to 400 ppm in the cathode compartment at high current efficiency by carrying out the electrolysis so that the value of the expression:, (wherein F is 96,500 amp sec eq-1; C is the sodium chloride concentration in the anode compartment in eq.cm-3; Co is the sodium chloride limiting concentration in the anode compartment in eq.cm-3; K is the proportionality constant in sec cm-3ohm-1; V is the voltage drop in the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted September 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 2, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.