Process for activation of titanium and vanadium catalysts useful in ethylene polymerization
CA 1269197 C · Owner: Miles, David L. · Inventors: Cann, Kevin J.; Karol, Frederick J.; Miles, David L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for activating a titanium or vanadium compound and producing polyethylene comprising (i) dissolving a divalent magnesium halide and a Lewis acid having the formula RmA1Xn or RmBXn wherein R is an alkyl or aromatic radical, each radical having 1 to 12 carbon atoms and each R being alike or different; X is a halogen atom; m is an integer from 0 to 3; n is an integer from 0 to 3; and m+n equals 3, in an excess of electron donor compound selected from the group consisting of alkyl esters of alkyl and aromatic carboxylic acids and alkyl and cycloalkyl ethers each compound having 2 to 12 carbon atoms in such a, manner that a magnesium halide/Lewis acid/electron donor complex is formed; …
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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 May 15, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 2007.
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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.