Late transition metal catalysts for olefin oligomerizations

Details Late transition metal catalysts for olefin oligomerizations Late transition metal catalysts for olefin oligomerizations

2011-01-18

2011-01-18

Lorengo, Jerry (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

C502S162000, C502S167000, C502S169000, C502S207000, C502S208000, C502S213000

Reexamination Certificate

active

07871953

ABSTRACT:
As series of novel late transition metal catalysts for olefin oligomerization have been invented. The catalyst system includes a Group 8, 9 or 10 transition metal and an activator. The catalysts demonstrate high activity and selectivity for linear α-olefins. Preferably this invention relates to a catalyst system comprising the reaction product of: (a) an activator selected from the group consisting of alumoxane, aluminum alkyl, alkyl aluminum halide, alkylaluminum alkoxide, discrete ionic activator, and Lewis acid; and (b) a catalyst precursor wherein the catalyst precursor has the following formula:wherein (i) M is a Group-8, -9 , or -10 transition metal; (ii) N is nitrogen (iii) P is phosphorus; (iv) R1, R2, R3, and R4are independently hydrocarbyl radicals; (v) Y is a hydrocarbyl bridge comprising a backbone wherein the backbone comprises a chain that is four or more carbon atoms long; (vi) X are independently abstractable ligands.

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