Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Reexamination Certificate
2007-12-18
2007-12-18
Choi, Ling-Sui (Department: 1713)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
C502S103000, C502S123000, C526S160000, C526S943000, C526S348000
Reexamination Certificate
active
11094681
ABSTRACT:
Supported stereospecific catalysts and processes for the stereotactic propagation of a polymer chain derived from ethylenically unsaturated monomers such as the polymerization of propylene to produce syndiotactic polypropylene or isotactic polypropylene. The supported catalyst comprises a stereospecific metallocene catalyst component and a co-catalyst component comprising an alkylalumoxane. Both the metallocene catalyst component and the co-catalyst component are supported on a particulate polyamide support comprising spheroidical particles of a polyamide having an average diameter with the range of 5-60 microns, and a porosity permitting distribution of a portion of the co-catalyst within the pore volume of the polyamide particles while retaining a substantial portion on the surface of the particles. The polyamide support is characterized by relatively low surface area, specifically a surface area less than 20 square meters per gram. The metallocene component can take the form of a single metallocene or two or more co-supported metallocenes.
REFERENCES:
patent: 5942586 (1999-08-01), Herrmann et al.
Gauthier William John
Henry Shady Nader
Hortmann Kai
Rauscher David John
Choi Ling-Sui
Fina Technology, Inc.
Jackson William D.
Kilpatrick-Lee Diane L.
LandOfFree
Polyamide supported metallocene catalysts does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polyamide supported metallocene catalysts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyamide supported metallocene catalysts will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3893018