Multi-stage glycolic acid crystallization

Details Multi-stage glycolic acid crystallization Multi-stage glycolic acid crystallization

2007-10-11

2008-10-21

Wilson, James O. (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

Reexamination Certificate

active

07439391

ABSTRACT:
The present invention relates to a high yield process to prepare high purity crystalline glycolic acid using a multi-loop crystallization process characterized by high liquid and/or solid recycle, said process suitable for large scale purification and producing high purity glycolic acid with low diglycolic acid content.

REFERENCES:
patent: 2260738 (1941-10-01), Berhenke et al.
patent: 2285886 (1942-06-01), Beck et al.
patent: 5853639 (1998-12-01), Kawakami et al.
patent: 6001439 (1999-12-01), Kawakami et al.
patent: 6159416 (2000-12-01), Kawakami et al.
patent: 6245437 (2001-06-01), Shiiki et al.
patent: 7002039 (2006-02-01), van Krieken
patent: 7164040 (2007-01-01), Kuroda et al.
patent: 2004/0249206 (2004-12-01), van Krieken
patent: 2005/0020853 (2005-01-01), Kuroda et al.
patent: WO 92/05138 (1992-04-01), None
patent: WO 03/064366 (2003-09-01), None
patent: WO 2006/064611 (2006-06-01), None

Affiliated with

Also associated with

Rating

Multi-stage glycolic acid crystallization does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-stage glycolic acid crystallization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-stage glycolic acid crystallization will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3992498