The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 2017
Filed:
Oct. 10, 2014
Process for preparing spherical polymerization catalyst components for use in olefin polymerizations
W. R. Grace & Co.—conn., Columbia, MD (US);
Kayo Umezawa-Vizzini, Pasadena, TX (US);
Vladimir P. Marin, Houston, TX (US);
Michael Spencer, Houston, TX (US);
Neil J. O'Reilly, Seabrook, TX (US);
Ahmed Hintolay, Sugarland, TX (US);
W. R. GRACE & CO.—CONN., Columbia, MD (US);
Abstract
A method of making a solid catalyst component for production of a polyolefin, including the steps of: a) dissolving a halide-containing magnesium compound in a mixture including alkylepoxide, an organic phosphorous compound, a carboxylic acid or anhydride, and a hydrocarbon solvent to form a homogenous solution; b) optionally treating the homogeneous solution with a halogenating agent; c) treating the homogenous solution with a first titanium halide compound in the presence of a surface modifier and optionally a first electron donor to form a solid precipitate, wherein, if present, the first electron donor is an ether; d) optionally treating the solid precipitate with a second electron donor; and e) treating the solid precipitate with a second titanium halide compound and optionally with a second electron donor to form the solid catalyst component.