Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2005-04-28
2009-11-03
Zucker, Paul A (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
Reexamination Certificate
active
07612231
ABSTRACT:
Disclosed is a simplified method for recovering acrylic acid from a mixture containing acrylic acid, acrylic acid dimer and impurities with high boiling point, in a stable and efficient manner. The method comprises the steps of: introducing the mixture into an acrylic acid recovering device comprising an acrylic distillation unit integrated with an acrylic acid dimer pyrolysis tank; carrying out decomposition of acrylic acid dimmer under reduced pressure and recovering acrylic acid. The method optionally further comprises a step of recycling a portion of the solution obtained from the bottom of the acrylic acid recovering device to the acrylic acid recovering device.
REFERENCES:
patent: 4317926 (1982-03-01), Sato et al.
patent: 5734075 (1998-03-01), Fauconet et al.
patent: 5910603 (1999-06-01), Aichinger et al.
patent: 6252110 (2001-06-01), Uemura et al.
patent: 6642414 (2003-11-01), Mitsumoto et al.
patent: 2004/0220426 (2004-11-01), Yada et al.
patent: 2004/0220427 (2004-11-01), Yada et al.
patent: 2004/0267045 (2004-12-01), Yada et al.
patent: 1382592 (2004-01-01), None
patent: 8-183756 (1996-07-01), None
patent: 11-012222 (1999-01-01), None
patent: WO-03/045889 (2003-05-01), None
patent: WO-03/045892 (2003-06-01), None
patent: WO-03/048100 (2003-12-01), None
English language abstract for Taiwanese Patent Publication No. 381078 B.
Choi Seok Hwan
Ha Kyoung Su
Kang Seong Pil
Kim Young Bae
Ko Jun Seok
Birch & Stewart Kolasch & Birch, LLP
LG Chem Ltd.
Zucker Paul A
LandOfFree
Method for recovering acrylic acid does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for recovering acrylic acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for recovering acrylic acid will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4122797