Tetramerization

Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing

Reexamination Certificate

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Details

C502S162000, C502S167000, C502S208000, C502S210000, C585S527000

Reexamination Certificate

active

07906681

ABSTRACT:
A new P—N—P ligand is useful in ethylene oligomerizations. In combination with i) a source of chromium and ii) an activator such as methylalumoxane; 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: 5340785 (1994-08-01), Reagen et al.
patent: 5491272 (1996-02-01), Tanaka et al.
patent: 5689028 (1997-11-01), Lashier et al.
patent: 5750817 (1998-05-01), Tanaka et al.
patent: 5856257 (1999-01-01), Freeman et al.
patent: 5910619 (1999-06-01), Urata et al.
patent: 5919996 (1999-07-01), Freeman et al.
patent: 6800702 (2004-10-01), Wass
patent: 7141633 (2006-11-01), Wass
patent: 2006/0173226 (2006-08-01), Blann et al.
patent: 2006/0229480 (2006-10-01), Blann et al.
patent: 2008/0242811 (2008-10-01), Gao et al.
Overett et al. Ethylene Trimerisation and Tetramerisation Catalyst with Polar-Substituted Diphosphinoamine Ligands. Chemical Communications. 2005. pp. 622-624.
Overett et al. Ethylene Trimerisation and Tetramerisation Catalyst with Polar-substituted Diphosphinoamine Ligands. Chemical Communications. 2005. 622-624.
Carter et al, High activity ethylene trimerisation catalysts based on diphosphine ligands, ChemComm, 2002, pp. 858-859.
Pangborn et al, Safe and Convenient Procedure for Solvent Purification, Organometallics, 1996, pp. 1518-1520, vol. 15, No. 5.

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