Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Inorganic carbon containing
Reexamination Certificate
2006-04-04
2006-04-04
Wood, Elizabeth D. (Department: 1755)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Inorganic carbon containing
C502S159000
Reexamination Certificate
active
07022641
ABSTRACT:
Metal cyanide catalyst dispersions in initiator compounds and/or polyethers are prepared by reacting an acidic metal cyanide compound with an insoluble metal salt in a medium that is a solvent for the acidic metal cyanide compound but not the metal salt. The resulting catalyst slurry may be combined with an initiator and stripping to form a catalyst/initiator or catalyst/polyether slurry. Using this method, an active alkylene oxide polymerization catalyst is prepared, and the preparation method is greatly simplified. Further, it is not necessary to use a separate organic complexing agent in the preparation.
REFERENCES:
patent: 3278457 (1966-10-01), Milgrom
patent: 3278458 (1966-10-01), Belner
patent: 3278459 (1966-10-01), Herold
patent: 3404109 (1968-10-01), Milgrom
patent: 3427256 (1969-02-01), Milgrom
patent: 3427335 (1969-02-01), Herold
patent: 4472560 (1984-09-01), Kuyper et al.
patent: 4477589 (1984-10-01), Van Der Hulst et al.
patent: 5470813 (1995-11-01), Le-Khac
patent: 5639705 (1997-06-01), Bowman et al.
patent: 5783513 (1998-07-01), Combs et al.
patent: 6348565 (2002-02-01), Wehmeyer
patent: 6355848 (2002-03-01), Antons et al.
patent: 6429342 (2002-08-01), Clement et al.
patent: 01/04179 (2001-01-01), None
patent: 01/04183 (2001-01-01), None
patent: 2001/090216 (2001-11-01), None
patent: 03/080241 (2003-10-01), None
Kuyper et al, “Hexacyanometallate Salts Used a Alkene-Oxide Polymerization Catalysts and Molecular Sleves,” Journal of Calalysis, 105, and G. Boxhoorn, pp. 163-174 (1987).
Dow Global Technologies Inc.
Wood Elizabeth D.
LandOfFree
Method for preparing metal cyanide catalysts using insoluble... 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 for preparing metal cyanide catalysts using insoluble..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preparing metal cyanide catalysts using insoluble... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3566281