Catalyst systems for ethylene oligomerisation to linear...

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing

Reexamination Certificate

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C502S167000, C502S168000, C526S161000, C526S171000, C526S172000, C556S138000

Reexamination Certificate

active

07053020

ABSTRACT:
A catalyst system comprising:(a) one or more bisarylimino pyridine iron or cobalt catalysts;(b) a first co-catalyst compound which is selected from aluminium alkyls, aluminoxanes, and mixtures thereof; and(c) a second co-catalyst compound which comprises one or more compounds of the formula ZnR′2wherein each R′, which may be the same or different, is selected from hydrogen, optionally substituted C1–C20hydrocarbyl, phenyl, Cl, Br, I, SR″, NR″2, OH, OR″, CN, NC wherein R″, which within the same molecule may the same or different, is C1–C20hydrocarbyl.

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