Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Reexamination Certificate
2006-02-13
2009-08-11
Drodge, Joseph W (Department: 1797)
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
C210S639000, C210S774000, C210S806000, C435S158000, C568S868000, C568S872000
Reexamination Certificate
active
07572376
ABSTRACT:
Disclosed herein are processes for the recovery of 1,3-propanediol from an aqueous feed stream. The present invention involves contacting an aqueous feed stream that comprises water, 1,3-propanediol, and at least one contaminant with at least one solvent extractant to form a mixture. The mixture is separated into a first phase and a second phase. The second phase comprises a majority of the water from the aqueous feed stream. The first phase comprises solvent extractant and at least some of the 1,3-propanediol that was present in the aqueous feed stream. The weight ratio in the first phase of 1,3-propanediol to any one contaminant present is greater than the weight ratio of 1,3-propanediol to the same contaminant in the aqueous feed stream prior to the aqueous feed stream being contacted with the solvent extractant. The first phase can be removed from the separated second phase in order to recover the 1,3-propanediol.
REFERENCES:
patent: 3707188 (1972-12-01), Heckman
patent: 5008473 (1991-04-01), Breitkopf et al.
patent: 5164309 (1992-11-01), Gottschalk et al.
patent: 5254467 (1993-10-01), Kretschmann et al.
patent: 5304691 (1994-04-01), Arhancet et al.
patent: 5356812 (1994-10-01), Matsuyama et al.
patent: 5463145 (1995-10-01), Powell et al.
patent: 5527973 (1996-06-01), Kelsey
patent: 5599689 (1997-02-01), Haynie et al.
patent: 5633362 (1997-05-01), Nagarajan et al.
patent: 5770776 (1998-06-01), Powell et al.
patent: 5821092 (1998-10-01), Nagarajan et al.
patent: 6013494 (2000-01-01), Nakamura et al.
patent: 6025184 (2000-02-01), Laffend et al.
patent: 6136576 (2000-10-01), Diaz-Torres et al.
patent: 6171501 (2001-01-01), Eyal et al.
patent: 6232511 (2001-05-01), Haas et al.
patent: 6342464 (2002-01-01), Arhancet et al.
patent: 6361983 (2002-03-01), Ames
patent: 6406895 (2002-06-01), Defretin et al.
patent: 6428767 (2002-08-01), Burch et al.
patent: 6428992 (2002-08-01), Roturier et al.
patent: 6469222 (2002-10-01), Knifton et al.
patent: 6479716 (2002-11-01), Hilaly et al.
patent: 6514733 (2003-02-01), Emptage et al.
patent: 6576450 (2003-06-01), Skraly et al.
patent: 6706503 (2004-03-01), Schellenberger et al.
patent: 6942803 (2005-09-01), Cockrem et al.
patent: 7056439 (2006-06-01), Baniel et al.
patent: 2002/0164729 (2002-11-01), Skraly et al.
patent: 2004/0262221 (2004-12-01), Herold et al.
patent: WO 96/18596 (1996-06-01), None
patent: WO 01/73097 (2001-10-01), None
Bruce et al.,Biotechnol. Prog.7:116-124 (1991).
Laane et al.,Biotech. Bioengin.30:81-87 (1987).
Malinowski,Biotechnology Techniques13:127-130(1999).
Baiada Anthony
Baniel Avraham M.
Jansen Robert P.
Vitner Asher
Drodge Joseph W
Tate & Lyle Ingredients Americas, Inc.
Williams Morgan & Amerson P.C.
LandOfFree
Process for producing 1,3-propanediol does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for producing 1,3-propanediol, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing 1,3-propanediol will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4120371