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
2007-12-11
2011-12-06
Wu, David W (Department: 1762)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
C502S103000, C502S129000, C502S156000, C502S172000, C526S113000, C526S124300, C526S210000
Reexamination Certificate
active
08071499
ABSTRACT:
A catalyst component comprising Ti, Mg, Al, Cl, and optionally ORIgroups in which RIis a C1-C20 hydrocarbon group, optionally containing heteroatoms, up to an amount such as to give a molar ORI/Ti ratio lower than 0.5, characterized by the fact that substantially all the titanium atoms are in valence state of 4, that the porosity (PF), measured by the mercury method and due to pores with radius equal to or lower than 1 μm, is at least 0.3 cm3/g, and by the fact that the Cl/Ti molar ratio is lower than 29.The said catalysts are characterized by high morphological stability under the low molecular weight ethylene polymerization conditions while at the same time maintaining characteristics of high activity.
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Dall'Occo Tiziano
Liguori Dario
Morini Giampiero
Pater Joachim T. M.
Vitale Gianni
Basell Poliolefine Italia s.r.l.
Dilworth IP LLC
Eng Elizabeth
Wu David W
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