Process for preparation of polytrimethylene ether glycols

Details Process for preparation of polytrimethylene ether glycols Process for preparation of polytrimethylene ether glycols

2006-07-11

2006-07-11

Keys, Rosalynd (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S618000, C568S619000

Reexamination Certificate

active

07074969

ABSTRACT:
There is disclosed a process for preparing polytrimethylene ether glycol by acid catalyzed polycondensation, neutralization and contact with filter aid. The process avoids hydrolysis and yet provides product substantially free of catalyst derived end groups.

REFERENCES:
patent: 2520733 (1950-08-01), Morris et al.
patent: 3326985 (1967-06-01), Mason
patent: 5015789 (1991-05-01), Arntz et al.
patent: 5276201 (1994-01-01), Arntz et al.
patent: 5284979 (1994-02-01), Arntz et al.
patent: 5334778 (1994-08-01), Arntz et al.
patent: 5364984 (1994-11-01), Arntz et al.
patent: 5364987 (1994-11-01), Arntz et al.
patent: 5527973 (1996-06-01), Kelsey
patent: 5633362 (1997-05-01), Nagarajan et al.
patent: 5686276 (1997-11-01), Burch et al.
patent: 5821092 (1998-10-01), Nagarajan et al.
patent: 5962745 (1999-10-01), Arntz et al.
patent: 6140543 (2000-10-01), Arntz et al.
patent: 6232511 (2001-05-01), Arntz et al.
patent: 6235948 (2001-05-01), Sunkara et al.
patent: 6277289 (2001-08-01), Kurian et al.
patent: 6284930 (2001-09-01), Deusser et al.
patent: 6297408 (2001-10-01), Haas et al.
patent: 6331264 (2001-12-01), Chang et al.
patent: 6342646 (2002-01-01), Haas et al.
patent: 6562457 (2003-05-01), Goldfinger et al.
patent: 6590065 (2003-07-01), Goldfinger
patent: 6599625 (2003-07-01), Goldfinger et al.
patent: 6608168 (2003-08-01), Ng
patent: 6720459 (2004-04-01), Sunkara et al.
patent: 6875514 (2005-04-01), Sormani et al.
patent: 2002/0007043 (2002-01-01), Sunkara et al.
patent: 2002/0049356 (2002-04-01), Gunatillake et al.
patent: 2004/0030060 (2004-02-01), Sunkara et al.
patent: 2004/0030095 (2004-02-01), Sunkara et al.
patent: 2004/0225161 (2004-11-01), Sunkara et al.
patent: 2004/0225162 (2004-11-01), Sunkara et al.
patent: 2004/0225163 (2004-11-01), Sunkara et al.
patent: 2004/0249061 (2004-12-01), Sunkara et al.
patent: 2005/0020805 (2005-01-01), Sunkara et al.
patent: 2004-182974 (2004-07-01), None
patent: WO 2004/048440 (2004-06-01), None
Advanced Minerals Coporation, Comparing Conventional Diatomite and Celpure® Filter Aids, Technical Note AMC02, Version 3.5, 2002, pp. 1-2.
Advanced Minerals Coporation, AW Celite NF Media is a High Purity, Direct Replacement for Conventiona (Food Grade) Celite Diatomite Filter Aids, http://www.advancedminerals.com/aw—celite.htm, 2003, pp. 1-3.
U.S. Appl. No. 10/423,363, filed Apr.25, 2003.
International Search Report dated Nov. 29, 2005.
Advance Minerals Corporation, “Comparing Conventional Diatomite and Celpure Filter Aids”, Technical Note AMC02, Ver. 3.5, 2002, pp. 1-2.
Advanced Minerals Corporation, “AW Celite NF Media is a High Purity, Direct Replacement for Conventional (Food Grade) Celite Diatomite Filter Aids”, website: http://www.advancedminerals.com/aw—celite.htm, 2003, pp. 1-3.

Affiliated with

Also associated with

Rating

Process for preparation of polytrimethylene ether glycols 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 preparation of polytrimethylene ether glycols, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparation of polytrimethylene ether glycols will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3563912