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:
May. 31, 2011
Filed:
Dec. 19, 2006
Patrik Müller, Frankfurt, DE;
Robert L. Jones, Oakland, CA (US);
Reynald Chevalier, Frankfurt, DE;
Christian Sidot, Compiègne, FR;
Valerie Garcia, Margny-les-Compiègne, FR;
Patrik Müller, Frankfurt, DE;
Robert L. Jones, Oakland, CA (US);
Reynald Chevalier, Frankfurt, DE;
Christian Sidot, Compiègne, FR;
Valerie Garcia, Margny-les-Compiègne, FR;
Basell Polyolefine GmbH, Wesseling, DE;
Abstract
The present invention relates to a process for recycling cyclopentadienyl derivatives of the formulae (I) and (I'), a process for preparing metallocenes of the formula (III) from cyclopentadienyl derivatives of the formulae (I) and (I′) or from bridged biscyclopentadienyl derivatives of the formula (II), in which the cyclopentadienyl derivatives of the formulae (I), (I′) or (II) which are used have been at least partly recovered and purified by means of liquid-solid chromatography, and the use of liquid-solid chromatography for purifying substituted, recovered cyclopentadienyl derivatives of the formulae (I), (I′) or (II).