Method for production of magnesium chloride to be used for production of magnesium metal by leaching magnesite in hydrochloric acid
CA 1338732 C · Owner: Baumann, Hanne Merete · Inventors: Mejdell, Glýr Thorvald; Tveten, Kjell Wallin; Baumann, Hanne Merete
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method for production of magnesium chloride to be used for, production of magnesium by leaching of magnesite in hydro-, chloric acid. A two-stage leaching process is used where in the first stage coarsly crushed magnesite lumps are dissolved by feeding hydrochloric acid. The reaction solution from the first stage is led to a second stage, where finely ground magnesite or hydrochloric acid is added to obtain approximate equivalence between magnesium and chlorine. To precipitate the impurities an excess of magnesium oxide or magnesium hydroxide is added in one or several purification stages.
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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 November 26, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 2013.
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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.