Quality of phthalic acids improved by strong inorganic acids

Details Quality of phthalic acids improved by strong inorganic acids Quality of phthalic acids improved by strong inorganic acids

1972-12-20

1976-03-16

Weinberger, Lorraine A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 5133, C07C 6326

Patent

active

039446018

ABSTRACT:
Phthalic acids of improved quality are obtained direct from oxidation of xylenes with molecular oxygen in oxidation zone having less than one equivalent of strongly acidic inorganic acid per equivalent of catalyst metal present in addition to a liquid phase acetic acid solution of one or more heavy metal oxidation catalyst and bromine releasing bromide compound. Particularly useful inorganic acids are those having ionization constant K.sub.A greater than 1.0 .times. 10.sup.-.sup.2, e.g. hydrobromine, nitric, sulfuric and phosphoric acids. Such quality improvement is manifested by decreased aldehydic acid and toluic acid impurity contents.

REFERENCES:
patent: 3047612 (1962-06-01), Pennington et al.
patent: 3075009 (1963-06-01), Keith et al.
patent: 3665030 (1972-05-01), Radzitsky et al.

Affiliated with

Also associated with

Rating

Quality of phthalic acids improved by strong inorganic 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 Quality of phthalic acids improved by strong inorganic acids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quality of phthalic acids improved by strong inorganic acids will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-292546