Process for the preparation of pure cyclic phosphoric acid...

Details Process for the preparation of pure cyclic phosphoric acid... Process for the preparation of pure cyclic phosphoric acid...

C - Chemistry, Metallurgy

07

F

260/457.3

C07F 9/547 (2006.01) C07F 9/6574 (2006.01)

Patent

CA 2030179

Abstract of the disclosure: Process for the preparation of pure cyclic phosphoric acid diaryl esters To prepare pure cyclic phosphoric acid diaryl esters from POHal3 and a bis-phenol derivative or a dihydroxy- dinaphthyl derivative, POHal3 is employed in a stoichio- metric excess of 0 to 500 mol% and the reaction is carried out in the presence of a catalyst at temperatures from 50 to 180°C over a period of 1 to 24 hours. After the reaction, excess POHal3 is removed and the reaction mixture is diluted with 0.1 to 10 g of glacial acetic acid per g. The reaction mixture diluted with glacial acetic acid is hydrolyzed with 1 to 4 moles of water, calculated on the number of moles of POHal3 reacted, and the cyclic phosphoric acid diaryl esters deposited in the form of crystals are filtered off.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-2080526