Process for preparing anhydrous magnesium halide solution and process for preparing solid titanium catalyst component for olefin polymerization
CA 2201230 A1 · Owner: Mitsui Chemicals, Inc. · Inventors: Takeda, Masayuki; Itoh, Yoshinao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a process for preparing an anhydrous magnesium halide solution, comprising a step of distilling water off from an oxygen-containing organic solvent solution of hydrous magnesium halide containing at least calcium as impurity, to prepare an oxygen-containing organic solvent solution of anhydrous magnesium halide wherein a potassium compound is added in said step to precipitate calcium, followed by removing the calcium. According to this process an anhydrous magnesium halide, solution scarcely containing calcium can be prepared from hydrous magnesium halide containing calcium as impurity. Also disclosed is a process for preparing a solid titanium catalyst component for olefin …
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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
- Filed March 27, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.