Process for the cyclization of orthobenzoylbenzoic acid

Details Process for the cyclization of orthobenzoylbenzoic acid Process for the cyclization of orthobenzoylbenzoic acid

1989-11-08

1990-10-30

Raymond, Richard L.

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

Organic compounds

Polycyclo ring system containing anthracene configured ring...

C07C 5018

Patent

active

049669842

ABSTRACT:
The process for the cyclization of orthobenzoylbenzoic acid into anthraquinone comprising heating orthobenzoylbenzoic acid in the solid phase at a temperature between about 300.degree. C. to 400.degree. C. in the presence of a superactive bleaching earth. The invention also comprises a process for the separation of phthalic acid and any phthalic anhydride impurities from orthobenzoylbenzoic acid prior to its cyclization into anthraquinone through the use of said earth at a temperature from 200.degree. C. to 250.degree. C.

REFERENCES:
patent: 4045456 (1977-08-01), Merger et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-275925