Process for defluorinating an acid sulphate solution
CA 1210564 A · Owner: Metallurgie Hoboken-Overpelt · Inventors: Detournay, Jacquy J.C..; Sterckx, Jozef V.M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for defluorinating an acid sulphate solution Abstract, A process for defluorinating a solution of a sulphate of Zn Ni, Cd, Mn and/or Mg, in which Al3+ and PO43- ions are added to the solution, then the solution is neutralized up to a pH higher than 4 and lower than that one that causes a substantial precipitation of Zn Ni, Cd, Mn and/or Mg, thereby producing a fluorinated precipitate and the precipitate is separated from the solution.
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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, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 2, 2003.
- 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.