C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/507
C07C 63/00 (2006.01) C07C 51/08 (2006.01)
Patent
CA 1065339
ABSTRACT A process for making an aromatic carboxylic acid of high purity by feeding an essentially equilibrium hydrolysis mixture of an aromatic nitrile to a reactive distillation column operated at a temperature of from about 200°C. to about 325°C. at autogenous pressure where the equilibrium mixture is subjected simultaneously to further hydrolysis and distillation of ammonia, removing water vapor and ammonia from the top of the column, subjecting remaining equilibrium hydrolysis mixture to further hydrolysis and distillation in a reboiler, returning vapor from the reboiler to the distillation column, removing an aqueous solution of product acid from the reboiler, cooling said sepa- rated solution, separating acid product, and in order to improve product purity, returning the aqueous filtrate from said sepa- rated acid product to a lower portion of said column. In one embodiment of the invention the hydrolysis mixture is obtained by subjecting a nitrile from the ammoxidation of an alkyl aromatic compound to aqueous hydrolysis in a closed reactor at about 200° to about 325°C. until an essentially complete equilibrium is obtained. -i-
248613
Hancock Allen W. (ii)
Vanderwerff William D.
LandOfFree
Process for making aromatic acids 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 making aromatic acids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for making aromatic acids will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-985135