Procedure for the preparation of a solid component of catalyst for the (co)polymerization of ethylene
CA 2073657 C · Owner: Menconi, Francesco · Inventors: Moalli, Angelo; Barazzoni, Lia; Invernizzi, Renzo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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A solid component of catalyst highly active in the (co)polymerization of ethylene containing titanium magnesium, aluminium, chlorine and alkoxy groups and is obtained by means of a, procedure wherein: (i) a solid, granular support of magnesium chloride obtained by spray-drying an alcohol solution of magnesium chloride, is suspended in a liquid hydrocarbon solvent and an aliphatic alcohol and a titanium tetraalkoxide are added to the suspension thus obtained, (ii) the suspension of step (i) is heated until a homogeneous solution is obtained and the solution is cooled to precipitate a granular solid (iii) the granular solid obtained in step (ii) in the, relative suspension, is put in contact …
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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.
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- Filed July 10, 1992 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 2014.
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