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
2007-06-01
2011-11-22
Mayes, Melvin (Department: 1732)
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
active
08062989
ABSTRACT:
Catalyst precursors comprising Mg, Cl, Ti, and OR groups that are in molar ratios defined by the formula MgClnTip(OR)(2−n)+4pin which n is from 0.3 to less than 1.7, p is lower than 0.6, the molar ratio (OR)/Cl is lower than 4 and R is C1-C15 hydrocarbon groups. The said precursor, just upon activation with organo-Al compounds, are able to advantageously polymerize ethylene and alpha olefins, and that upon reaction with halogenating compounds generate in high yields catalyst components with high polymerization activity particularly in the polymerization of propylene also in combination with 1,3-diethers.
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Cristofori Antonio
Gaddi Benedetta
Liguori Dario
Morini Giampiero
Pater Joachim T. M.
Basell Poliolefine Italia s.r.l.
Cohen Stefanie
Dilworth IP LLC
Mayes Melvin
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