Fremgangsmåte ved rensning av vandige, terti¶re aminoksydopplösninger, samt fremgangsmåte ved rensing av et bruktutfellingsbad

摘要

PCT No. PCT/AT96/00148 Sec. 371 Date Apr. 15, 1997 Sec. 102(e) Date Apr. 15, 1997 PCT Filed Aug. 16, 1996 PCT Pub. No. WO97/07268 PCT Pub. Date Feb. 27, 1997The invention is concerned with a process for the purification of an aqueous solution of a tertiary amine-oxide containing impurities partially present in a dissolved and partially in a non-dissolved, colloidal state, and is characterized by a combination of the steps of (A) removing from the aqueous solution substantially all of said impurities present in a non-dissolved, colloidal state and (B) contacting said aqueous solution obtained in step (A) with an ion exchanger.