Process of purification of magnesic raw material
CA 1210219 A · Owner: Vysoka Skola Chemicko-Technologicka · Inventors: Najmr, Stanislav; Jerman, Zdenek; Kralicek, Jaroslav
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process of purification of magnesic raw materials by converting calcinated magnesite crude or contaminated magnesium oxide or magnesium hydroxide hydrated magnesium carbonates, crude crystals of magnesium sulphite or a mixture of these compounds to magnesium sulphite, in aqueous suspension by the action of sulphur dioxide, characterized in that the thus arisen reaction mixture is separated into at least one fraction enriched with MgSO3?xH2O wherein x is an integer of 3 or 6, and at least one fraction containing concentrated contaminants, the starting reaction mixture, or the fraction enriched with MgSO3?xH2O or the, fraction containing concentrated contaminants …
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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 August 26, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 26, 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
Timeline From CIPO dates
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.