Process for recovering methacrylic acid

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

203 42, 203 62, 203 63, 203 74, 203 91, 203 87, 203DIG21, 260603C, 562536, B01D 336, C07C 5704, C07C 5142

Patent

active

041477219

ABSTRACT:
In an oxidation process for converting methacrolein to methacrylic acid, methacrylic acid is recovered by cooling and condensing the effluent from the oxidation, followed by azeotropic distillation of the condensate with a suitable solvent, such as methyl n-propyl ketone. The condensed effluent contains methacrylic acid and water as the major components along with by-product acetic acid, a minor amount of unreacted methacrolein and impurities. Substantially dry crude methacrylic acid is separated as a bottom product from the azeotropic distillation and an azeotrope of water and the solvent is taken overhead and condensed. After condensation, solvent-rich and water-rich phases form and are separated. The solvent-rich phase is returned to the distillation column as a reflux, while the water-rich phase is sent to a stripping column for recovery of residual solvent. Water is withdrawn from the bottom of the stripping column and recycled or discarded, as desired. Optionally, an additional distillation column may be used in order to remove unreacted methacrolein from the solvent used in the azeotropic distillation.

REFERENCES:
patent: 2811545 (1957-10-01), Steadman
patent: 2922815 (1960-01-01), Faerber
patent: 3414485 (1968-12-01), Speed
patent: 3926744 (1975-12-01), Noll et al.
patent: 3932500 (1976-01-01), Duembgen et al.
patent: 4001316 (1977-01-01), Ishimi
patent: 4012449 (1977-03-01), Shakakura et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Process for recovering methacrylic 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 Process for recovering methacrylic acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for recovering methacrylic acid will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1746431

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.