Process for the formation and recovery of poly(bisbenzimidazoenz

Details Process for the formation and recovery of poly(bisbenzimidazoenz Process for the formation and recovery of poly(bisbenzimidazoenz

1976-02-05

1977-01-25

Schofer, Joseph L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08G 2000, C08G 2032, C08G 3302, C08G 2020

Patent

active

040050580

ABSTRACT:
An improved overall process is provided wherein poly(bisbenzimidazobenzophenanthroline) is formed on an expeditious basis and is recovered from the reaction mass in substantially pure form. Appropriate quantities of 1,4,5,8-tetracarboxy naphthalene dianhydride and 3,3',4,4' -tetraaminobiphenyl are condensed as defined) in a reaction zone while dissolved in molten antimony trichloride, and the resulting reaction mass containing the dissolved product is discharged into a precipitation zone containing hydrochloric acid (as defined). The resulting solid product is separated and dried. The liquid portion which is separated from the solid product contains antimony trichloride dissolved in hydrochloric acid and is subjected to distillation which substantially separates these components. The antimony trichloride is recycled to the reaction zone, and the hydrochloric acid is recycled to the precipitation zone.

REFERENCES:
patent: 3539677 (1970-11-01), Steinberg et al.
patent: 3560444 (1971-02-01), Brunner
patent: 3574170 (1971-04-01), Chenevey
patent: 3574171 (1971-04-01), Chenevey et al.
patent: 3767616 (1973-10-01), Zellner
patent: 3798201 (1974-03-01), Saferstein et al.
patent: 3864310 (1975-02-01), Saferstein

Affiliated with

Also associated with

Rating

Process for the formation and recovery of poly(bisbenzimidazoenz 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 formation and recovery of poly(bisbenzimidazoenz, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the formation and recovery of poly(bisbenzimidazoenz will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1477984