Amino phosphine

Details Amino phosphine Amino phosphine

2011-08-09

2011-08-09

Sullivan, Peter O (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

Reexamination Certificate

active

07994363

ABSTRACT:
A new P-N-P ligand in which each phosphorus atom is bonded to two ortho-fluorine substituted phenyl groups is useful in ethylene oligomerizations. In combination with i) a source of chromium and ii) an activator such as methalumoxane; the ligand of this invention may be used to prepare an oligomer product that contains a mixture of hexenes and octenes. The hexenes and octenes produced with this ligand contain very low levels of internal olefins when produced under preferred reaction conditions.

REFERENCES:
patent: 5198563 (1993-03-01), Reagen et al.
patent: WO 02/04119 (2002-01-01), None
patent: WO 2004/056478 (2004-07-01), None
patent: WO 2004/056479 (2004-07-01), None
“High Activity Ethylene Trimerisation Catalysts Based on Phosphine Ligands”, Chem. Comm. 2002, p. 858-859 Carter et al.

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