Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Reexamination Certificate
2006-04-11
2006-04-11
Lorengo, J. A. (Department: 1755)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
C502S127000, C502S128000, C502S133000, C502S134000, C526S123100, C526S124300, C526S124400, C526S125700, C526S125800
Reexamination Certificate
active
07026265
ABSTRACT:
Process for the preparation of a particular olefin polymerisation catalyst component including magnesium dihalide, titanium tetrahalide and a carboxylic acid ester, in which the precursors of its constituents are reacted in solution from which the component is precipitated, this precipitation being accompanied by co-precipitation of one or more oligoesters of the carboxylic acid formed in a controlled manner.
REFERENCES:
patent: 5424379 (1995-06-01), Kakugo et al.
patent: WO 00/08073 (2000-02-01), None
patent: WO 00/68277 (2000-11-01), None
International Search Report corresponding to International Application No. PCT/EP 01/12052.
International Preliminary Examination Report corresponding to International Application No. PCT/EP 01/12052.
Denifl Peter
Leinonen Timo
Borealis Technology Oy
Fay Sharpe Fagan Minnich & McKee LLP
Lorengo J. A.
Pasterczyk J.
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