Production of terephthalic acid

Details Production of terephthalic acid Production of terephthalic acid

C - Chemistry, Metallurgy

07

C

260/510.8

C07C 63/26 (2006.01) C07C 51/265 (2006.01)

Patent

CA 1180026

ABSTRACT OF THE DISCLOSURE Disclosed is a process for the continuous production of terephthalic acid from p-xylene, com- prising the steps of oxidizing p-xylene in a first oxidation zone in the presence of not more than about 10 weight % of water and a cobalt/manganese catalyst up to a conversion of about 15% terephthalic acid; oxidizing the partially-oxidized compounds in a second oxidation zone in the presence of an addi- tional amount of water up to about 20 to 70% by weight and in the presence of an additional amount of the catalyst up to a conversion of about 50% by weight terephthalic acid; stripping p-xylene va- pors from the second oxidation zone; separating crystals of crude terephthalic acid from the effluent from the second oxidation zone from the soluble components of the effluent; countercurrent- ly washing the separated crystals with fresh water to produce a slurry; recycling a part of soluble components to the second oxidation zone, and an- other part of the first oxidation zone to provide the latter with heavy metal catalyst; and recovering purified terephthalic acid by recrystallizing the crystals contained in the slurry.

398259

Affiliated with

Also associated with

Rating

Production of terephthalic 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 Production of terephthalic acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of terephthalic acid will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1206112