Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Reexamination Certificate
2011-03-15
2011-03-15
Wu, David (Department: 1762)
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
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.
Carter Charles Ashton Garret
Gao Xiaoliang
Henderson Lee Douglas
Eng Elizabeth
Johnson Kenneth H
NOVA Chemicals (International ) S.A.
Wu David
LandOfFree
Tetramerization does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tetramerization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tetramerization will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2731423