Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2008-05-27
2008-05-27
Eyler, Yvonne (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C568S679000
Reexamination Certificate
active
07378559
ABSTRACT:
A continuous process and system for producing polyether polyols that allows for continuously adding an unreacted oxide to a loop reactor while adding at least one thermally deactivating catalyst capable of thermally deactivating prior to decomposition of polyether polyol which can allow for greater concentrations of unreacted oxides and/or a rate of reaction in the loop reactor is at a rate at least two times faster than a rate of reaction in a loop reactor containing less than 14 weight percent unreacted oxide. In a preferred embodiment, the catalyst is a double metal cyanide catalyst and a plug flow reactor is formed in series with the loop reactor wherein neither reactor contains a vapor space.
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: 3427334 (1969-02-01), Belner
patent: 3427335 (1969-02-01), Herold
patent: 3829505 (1974-08-01), Herold
patent: 5470813 (1995-11-01), Le-Khac
patent: 5482908 (1996-01-01), Le-Khac
patent: 5563221 (1996-10-01), Pazos
patent: 5689012 (1997-11-01), Pazos et al.
patent: 5731407 (1998-03-01), Le-Khac
patent: 5767323 (1998-06-01), Televantos et al.
patent: 5770678 (1998-06-01), Drysdale et al.
patent: 5777177 (1998-07-01), Pazos
patent: 5789626 (1998-08-01), Le-Khac
patent: 6018017 (2000-01-01), Le-Khac
patent: 6063897 (2000-05-01), Le-Khac et al.
patent: 6143802 (2000-11-01), Simroth et al.
patent: 6204357 (2001-03-01), Ooms et al.
patent: 6303533 (2001-10-01), Grosch et al.
patent: 6323350 (2001-11-01), Lindner et al.
patent: 6323375 (2001-11-01), Hofmann et al.
patent: 6835687 (2004-12-01), Hofmann et al.
patent: 0776922 (1997-06-01), None
patent: 6-16806 (1994-01-01), None
patent: WO-0172418 (2001-10-01), None
patent: WO-2004009671 (2004-01-01), None
Villa et al. Complex dynamic behavior during polyol preparation in continuous processes using heterogeneous double metal cyanide. AlChE Annual Meeting, Conference Proceedings, Austin TX Nov. 7-12, 2004.
G. Wegener et al., Trends in Industrial Catalysis in the Polyurethane Industry, Applied Catalysis A, 2001, p. 303-335, General 221.
Jean-Louis Gustin, Hazards XV: the Process, Its Safety and the Environment-Getting It Right!, Institution of Chemical Engineers by Synposium Series, 2000, p. 250-263.
American Institute of Chemical Engineers, Fire & Explosion Index Hazard Classification Guide, 1987, p. 5, 57-59, 6thedition.
Elwell Richard J.
Papadopulos Walter J. S.
Verwijs Jan W.
Villa Carlos M.
Weston John W.
Dow Global Technologies Inc.
Eyler Yvonne
Lao M. Louisa
LandOfFree
Continuous process and system of producing polyether polyols does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuous process and system of producing polyether polyols, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous process and system of producing polyether polyols will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2756725