Method of separating sulfuric acid from neutral sodium sulphate
CA 1079482 A · Owner: Howard, John · Inventors: Howard, John; Lobley, Derek G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of separating sulfuric acid from an aqueous solution of sulfuric acid and sodium sulfate. The method comprises adding to the aqueous solution a water soluble organic compound selected from the group consisting of alcohols and ketones. The resulting solid is separated to leave an aqueous solution of sulfuric acid. The method is of particular application in acid recovery from the effluent of a chlorine dioxide generator.
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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 June 17, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 17, 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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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.