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:
Oct. 03, 2006
Filed:
Sep. 27, 2005
Luigi Resconi, Ferrara, IT;
Davide Balboni, Ferrara, IT;
Luigi Resconi, Ferrara, IT;
Davide Balboni, Ferrara, IT;
Basell Polyolefine GmbH, Wesseling, DE;
Abstract
A process for preparing dihalide or monohalide metallocene compounds comprising contacting a compound of formula (II) (Cp)(ZR)(A)ML'(II) wherein Cp is a cyclopentadienyl radical; (ZR)is a divalent bridging group between Cp and A; A is a cyclopentadienyl radical or O, S, NR, PRwherein Ris an hydrocarbon radical, M is zirconium, titanium or hafnium. L′ is an hydrocarbon radical, r ranges from 0 to 2 and y is equal to 4; with an halogenating agent selected from the group consisting of: TLwherein Tis a metal of groups 3–13 of the periodic table; L is halogen and wis equal to the oxidation state of the metal T; TLwherein Tis a nonmetal element of groups 13–16 of the periodic table (new IUPAC version); and wis equal to the oxidation state of the element T; O=TLwhere Tis a selected from the group consisting of C, P and S; O is an oxygen atom bonded to Tthrough a double bond; and wis equal to the oxidation state of the element Tminus 2; RC(O)L, wherein Ris an hydrocarbon radical; Land HL.