Method of changing between incompatible polymerization...

Details Method of changing between incompatible polymerization... Method of changing between incompatible polymerization...

2011-06-21

2011-06-21

Teskin, Fred M (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S082000, C526S084000, C526S085000, C526S901000

Reexamination Certificate

active

07964677

ABSTRACT:
Method of changing from a polymerization using a first catalyst to a polymerization using a second catalyst which is incompatible with the first catalyst in a gas-phase reactor, which comprises the stepsa) stopping of the polymerization reaction using the first catalyst,b) flushing of the reactor under polymerization conditions with at least one deactivating agent comprising a volatile constituent and a nonvolatile constituent in a weight ratio of from 0.1 to 1000,c) introduction of the second catalyst into the reactor andd) continuation of the polymerization using the second catalyst.

REFERENCES:
patent: 3917466 (1975-11-01), Henry
patent: 4543399 (1985-09-01), Jenkins, III et al.
patent: 4764056 (1988-08-01), Zentgraf et al.
patent: 5283278 (1994-02-01), Daire et al.
patent: 5306792 (1994-04-01), Havas et al.
patent: 5319009 (1994-06-01), Brokken-Zijp et al.
patent: 5414064 (1995-05-01), Lux et al.
patent: 5442019 (1995-08-01), Agapiou et al.
patent: 6022935 (2000-02-01), Fischer et al.
patent: 6417302 (2002-07-01), Bohnen
patent: 6730753 (2004-05-01), Föttinger et al.
patent: 6784261 (2004-08-01), Schopf et al.
patent: 6849699 (2005-02-01), Bauer et al.
patent: 6995217 (2006-02-01), Agapiou et al.
patent: 7015169 (2006-03-01), Föttinger et al.
patent: 7053160 (2006-05-01), Bingel et al.
patent: 7238818 (2007-07-01), Ewen et al.
patent: 7629422 (2009-12-01), Goode et al.
patent: 2004/0127655 (2004-07-01), Veariel et al.
patent: 2005/0239978 (2005-10-01), Bohm et al.
patent: 2007/0037935 (2007-02-01), Karer et al.
patent: 3543360 (1987-06-01), None
patent: 571826 (1993-05-01), None
patent: WO 92/14766 (1992-09-01), None
patent: WO 94/25497 (1994-11-01), None
patent: WO 00/58377 (2000-10-01), None
patent: WO 2004/060931 (2004-07-01), None
patent: WO 2006/069204 (2006-06-01), None
patent: WO 2007/012406 (2007-02-01), None
Ullmann's Encyclopedia of Industrial Chemistry, vol. A21, 4th Edition, 1992, p. 511ff.
Small et al., “Highly Active Iron and Cobalt Catalysts for the Polymerization of Ethylene”,J. Am. Chem. Soc. 120, 1998, 4049-4050.
Britovsek, et al., “Novel Olefin Polymerization Catalysts Based on Iron and Cobalt”,J. Chem. Soc., Chem. Commun., 1998, 849.

Affiliated with

Also associated with

Rating

Method of changing between incompatible polymerization... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of changing between incompatible polymerization..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of changing between incompatible polymerization... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2663591