Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Reexamination Certificate
2010-06-09
2011-12-27
Lu, Caixia (Department: 1765)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
C502S103000, C502S152000, C526S133000, C526S134000, C526S160000, C526S165000, C526S943000
Reexamination Certificate
active
08084385
ABSTRACT:
Catalysts useful for polymerizing olefins are disclosed. The catalysts comprise an activator and a bridged cyclopentadienyl complex that incorporates a monoanionic hydroxylamido or hydrazido ligand fragment. Suitable complexes have the structure:wherein M is a Group 4 metal; Z is a divalent linking group; X is N or O; each of R1and R2is independently C1-C4alkyl or C6-C10aryl; R1and R2can be joined together; n is 0 when X is O, and n is 1 when X is N; each Y is independently halide, alkyl, dialkylamido, aryl, or aralkyl. A modeling approach is used to identify particular valuable complexes, each of which incorporates a readily synthesized cyclopentadienyl precursor.
REFERENCES:
patent: 5034802 (1991-07-01), Liebes, Jr. et al.
patent: 5153157 (1992-10-01), Hlatky et al.
patent: 5198401 (1993-03-01), Turner et al.
patent: 5241025 (1993-08-01), Hlatky et al.
patent: 5414180 (1995-05-01), Geerts et al.
patent: 5648440 (1997-07-01), Sugano et al.
patent: 6211311 (2001-04-01), Wang et al.
patent: 0791607 (1997-08-01), None
Park, Joon T., et al., “Cyclopentadienyl-Hydrazido Titanium Complexes : Synthesis, Structure, Reactivity, and Catalytic Properties,”Organometallics, 2000, 19, 1269-1276.
Bernardi, P., et al., “A General and Convenient Procedure for the Synthesis of N-Alkylarylamines and N-Alkylheteroarylamines by Electrophilic Amination of Cuprates with N-Alkylhydroxylamines,”Journal of Organic Chemistry, 1999, 64, 641-643.
Somei, M., et al., “Preparations of 1-Hydroxyindole Derivatives and Their Potent Inhibitory Activities on Platelet Aggregation,”Heterocycles, 1996, vol. 43, No. 9., 1855-1858.
Enders, M., et al., “8-Quinolylcyclopentadienyl, a Ligand with a Tailored Fit for Chelate Complexes,”Chem. Ber., 1996, 129, 459-463.
Chevalier Reynald
Nagy Sandor
Equistar Chemicals L.P.
Lu Caixia
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