C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 15/013 (2006.01)
Patent
CA 2436892
The invention relates to a process for the continuous preparation of very highly concentrated hydrogen peroxide having a content of greater than 80 wt.%, especially over 98 wt.%, by suspension crystallisation and after- treatment of the H2O2 crystals. According to the invention, the after- treatment takes the form of countercurrent washing in a hydraulic or mechanical washing column with a packed crystal bed. The invention also provides hydrogen peroxide having a concentration of from 99.9 to 100 wt.% and a content of TOC, nitrate, phosphate, nickel and tin of in each case less than 4 mg/l.
La présente invention concerne un procédé permettant l'obtention en continu de peroxyde d'hydrogène très hautement concentré, d'une teneur supérieure à 80% en masse, et plus particulièrement supérieure à 98% en masse, par cristallisation de suspension et post-traitement de cristaux de H¿2?O¿2?. Selon l'invention, le post-traitement prend la forme d'un lavage à contre-courant dans une colonne de lavage hydraulique ou mécanique avec un lit fixe de cristaux. L'invention concerne également du peroxyde d'hydrogène sous une concentration allant de 99,9% à 100% en masse pour une teneur en carbone organique total, nitrates, phosphates, nickel et étain inférieure en tout état de cause à 4 mg/l.
Creutz Matthias
Gross Stefan
Nordhoff Stefan
Wagner Rudolf
Degussa Ag
Evonik Degussa Gmbh
Marks & Clerk
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