公开(公告)号：US09714302B2

公开(公告)日：2017-07-25

申请号：US14512130

申请日：2014-10-10

Applicant: W. R. GRACE & CO.—CONN.

Inventor： Kayo Umezawa-Vizzini ,  Vladimir P. Marin ,  Michael Spencer ,  Neil J. O'Reilly ,  Ahmed Hintolay

IPC: C08F10/06 ,  C08F110/06

CPC classification number: C08F10/06 ,  C08F110/06 ,  C08F2500/12 ,  C08F2500/15 ,  C08F2500/18 ,  C08F2500/24 ,  C08F4/651 ,  C08F4/6545

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.