Process for separation of naphthoquinone and phthalic acid

Details Process for separation of naphthoquinone and phthalic acid Process for separation of naphthoquinone and phthalic acid

1982-06-25

1992-10-06

Garner, Vivian

Organic compounds -- part of the class 532-570 series

Organic compounds

Cyclohexadiene having atoms double bonded directly at the 1-...

562485, 562486, C07C 4610, C07C 5012

Patent

active

051533391

ABSTRACT:
Naphthoquinone having a purity of higher than 95% is separated from an aqueous slurry of naphthoquinone and phthalic acid prepared by contacting, with an aqueous medium, a reaction mixture gas containing naphthoquinone and phthalic anhydride formed by a catalytic vapor phase oxidation of naphthalene. An extraction of naphthoquinone is carried out with a chain or cyclic saturated hydrocarbon at 60.degree. to 110.degree. C. under the condition adjusting pH to 1.2 to 5 and substantially dissolving phthalic acid in the aqueous phase and leaving resinous materials as a bottom.

REFERENCES:
patent: 4202828 (1980-05-01), Matsuura et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1190446