Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2009-06-01
2011-10-25
Puttlitz, Karl J (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
Reexamination Certificate
active
08044238
ABSTRACT:
The present invention relates to reducing corrosion of distillation equipment during azeotropic distillation of (meth)acrylic acid in the presence of dissolved copper, by providing aqueous (meth)acrylic acid having not more than 0.1% by weight formaldehyde, based on the total weight of the aqueous (meth)acrylic acid. The source of the copper may, for example, be copper-based polymerization inhibitors added to the aqueous (meth)acrylic acid and/or distillation equipment.
REFERENCES:
patent: 2001/0016668 (2001-08-01), Mitsumoto et al.
patent: 2006/0142613 (2006-06-01), Yada et al.
Briegel Keith F.
DeCourcy Michael Stanley
Elder James
Juliette James Jerrick
Mendoza Joy Lydon
Bodner Marcella M.
Puttlitz Karl J
Rohm and Haas Company
LandOfFree
Method for production of purified (meth)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 production of purified (meth)acrylic acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for production of purified (meth)acrylic acid will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4285418