Process for the production of a superabsorbent polymer

Details Process for the production of a superabsorbent polymer Process for the production of a superabsorbent polymer

2009-10-07

2011-11-22

Cain, Edward (Department: 1762)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C523S513000

Reexamination Certificate

active

08063121

ABSTRACT:
The present invention relates to a process for the production of a superabsorbent polymer comprising preparing an aqueous mixture of monomers selected to provide after polymerization a superabsorbent polymer; feeding said monomer mixture to a reactor; subjecting the aqueous monomer mixture in the reactor to free-radical polymerization to obtain a superabsorbent polymer gel; removing the superabsorbent polymer gel from the reactor; and drying the superabsorbent polymer gel. Where at least one off-gas stream removed from any stage of the process is subjected to scrubbing with a basic aqueous solution prior to venting to obtain an aqueous scrubber solution that is at least partially recycled to any of the above steps of the process.

REFERENCES:
patent: 4466983 (1984-08-01), Cifrese et al.
patent: 4656232 (1987-04-01), Nakaki et al.
patent: 4734478 (1988-03-01), Tsubakimoto et al.
patent: 4857610 (1989-08-01), Chmelir et al.
patent: 4893999 (1990-01-01), Chmelir et al.
patent: 5298570 (1994-03-01), Tahara et al.
patent: 5314420 (1994-05-01), Smith et al.
patent: 5342889 (1994-08-01), Sullivan et al.
patent: 5342899 (1994-08-01), Graham et al.
patent: 5629377 (1997-05-01), Burgert et al.
patent: 6323252 (2001-11-01), Gartner et al.
patent: 6444744 (2002-09-01), Fujimaru et al.
patent: 6602950 (2003-08-01), Dentler et al.
patent: 6620889 (2003-09-01), Mertens et al.
patent: 6710141 (2004-03-01), Heide et al.
patent: 6727345 (2004-04-01), Kajikawa et al.
patent: 6831142 (2004-12-01), Mertens et al.
patent: 6835783 (2004-12-01), Gartner et al.
patent: 6911499 (2005-06-01), Brehm et al.
patent: 6916864 (2005-07-01), Gartner et al.
patent: 6987151 (2006-01-01), Gartner et al.
patent: 7179862 (2007-02-01), Mertens et al.
patent: 7285599 (2007-10-01), Mertens et al.
patent: 7342058 (2008-03-01), Peppmoller et al.
patent: 7378453 (2008-05-01), Nogi et al.
patent: 7473470 (2009-01-01), Ishizaki et al.
patent: 7625957 (2009-12-01), Harren et al.
patent: 7833624 (2010-11-01), Harren et al.
patent: 2003/0207997 (2003-11-01), Mertens et al.
patent: 2004/0186229 (2004-09-01), Heide et al.
patent: 2005/0171235 (2005-08-01), Harren et al.
patent: 2007/0066167 (2007-03-01), Wada et al.
patent: 2007/0078231 (2007-04-01), Shibata et al.
patent: 2007/0123658 (2007-05-01), Torii et al.
patent: 2007/0129495 (2007-06-01), Mertens et al.
patent: 2008/0114095 (2008-05-01), Peppmoller et al.
patent: 2008/0194863 (2008-08-01), Weismantel et al.
patent: 2008/0200623 (2008-08-01), Weismantel et al.
patent: 2009/0234314 (2009-09-01), Nakamura et al.
patent: 2010/0036004 (2010-02-01), Harren et al.
patent: 2010/0099799 (2010-04-01), Fricker et al.
patent: 2010/0105808 (2010-04-01), Fricker et al.
patent: 2010/0130950 (2010-05-01), Harren et al.
patent: 2010/0209379 (2010-08-01), Furno et al.
patent: 1258338 (1989-08-01), None
patent: 3432690 (1985-03-01), None
patent: 3544770 (1987-06-01), None
patent: 19642761 (1998-04-01), None
patent: 19846412 (2000-04-01), None
patent: 102005014291 (2006-09-01), None
patent: 102005042604 (2007-03-01), None
patent: 688340 (1995-12-01), None
patent: 827753 (1998-03-01), None
patent: 1470905 (2004-10-01), None
patent: 2116571 (2009-11-01), None
patent: 2163302 (2010-03-01), None
patent: 64033158 (1989-03-01), None
patent: 5086251 (1993-04-01), None
patent: 5239127 (1993-09-01), None
patent: 11322846 (1999-11-01), None
patent: 2000230129 (2000-08-01), None
patent: 2000313796 (2000-11-01), None
patent: 2001011328 (2001-01-01), None
patent: 2003206381 (2003-07-01), None
patent: 2004300425 (2004-10-01), None
patent: 2005111474 (2005-04-01), None
patent: 2006055833 (2006-03-01), None
patent: 2007119757 (2007-05-01), None
patent: 9305080 (1993-03-01), None
patent: 9420547 (1994-09-01), None
patent: 9816308 (1998-04-01), None
patent: 0116197 (2001-03-01), None
patent: 0138402 (2001-05-01), None
patent: 03000621 (2003-01-01), None
patent: 03004237 (2003-01-01), None
patent: 03022896 (2003-03-01), None
patent: 2004003036 (2004-01-01), None
patent: 2006062609 (2006-06-01), None
patent: 2006134085 (2006-12-01), None
patent: 2007028748 (2007-03-01), None
European Search Report mailed on Mar. 10, 2009 in European Application No. 08017554.1.
European Search Report mailed on Mar. 10, 2009 in European Application No. 08017543.3.
European Search Report mailed on Aug. 20, 2010 in European Patent Application No. EP10003452.
International Search Report mailed on Aug. 12, 2008 in PCT/JP2008/062041.
International Search Report mailed on May 1, 2008 in PCT/JP2008/051777.
European Search Report mailed on Mar. 10, 2009 in European Application No. 08017545.8.
Daniel Fricker et al., U.S. Appl. No. 61/103,663, filed Oct. 8, 2008.
Daniel Fricker et al., U.S. Appl. No. 61/103,670, filed Oct. 8, 2008.
Jorg Harren et al., U.S. Appl. No. 10/532,280, filed Aug. 19, 2005.
Jorg Harren et al., U.S. Appl. No. 12/525,955, filed Aug. 5, 2009.
Fricker et al., U.S. Appl. No. 12/575,071, filed Oct. 7, 2009.
Fricker et al., U.S. Appl. No. 12/575,146, filed Oct. 7, 2009.
Gartner et al., U.S. Appl. No. 12/942,633, filed Nov. 9, 2010.

Affiliated with

Also associated with

Rating

Process for the production of a superabsorbent polymer 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 the production of a superabsorbent polymer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of a superabsorbent polymer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4309800