Process for preparing 3,4,3',4'-benzophenone-...

Details Process for preparing 3,4,3',4'-benzophenone-... Process for preparing 3,4,3',4'-benzophenone-...

C - Chemistry, Metallurgy

07

D

260/364.8

C07D 307/89 (2006.01) C07C 2/86 (2006.01) C07C 51/275 (2006.01) C07C 51/56 (2006.01)

Patent

CA 1117959

PROCESS FOR PREPARING 3,4,3',4-BENZOPHENONETETRA- CARBOXYLIC DIANHYDRIDE ABSTRACT OF THE DISCLOSURE A process for preparing 3,4,3',4'-benzophenonetetra- carboxylic dianhydride which comprises condensing an impure ortho-xylene mixture with acetaldehyde in contact with an acid catalyst to obtain an impure 1,1-bis(3,4-dimethylphenyl)ethane mixture, oxidizing the 1,1-bis(3,4-dimethylphenyl)ethane mixture with nitric acid to obtain a mixture of carboxylic acids, from which by crystallization and dehydration substantially pure 3,4,3',4'-benzophenonetetracarboxylic dianhydride is recovered.

330492

Affiliated with

Also associated with

Rating

Process for preparing 3,4,3',4'-benzophenone-... 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 preparing 3,4,3',4'-benzophenone-..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing 3,4,3',4'-benzophenone-... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-172098