Process for demetallization of highly acidic baths or use of...

Details Process for demetallization of highly acidic baths or use of... Process for demetallization of highly acidic baths or use of...

C - Chemistry, Metallurgy

25

F

C25F 7/02 (2006.01)

Patent

CA 2226367

A process is disclosed for demetallising highly acid baths based on phosphoric and sulphuric acid, as well as a process for electropolishing special steel surfaces. The separate electrolytic reduction of Fe(III) into Fe(II), followed by the separation of precipitated substances, allows in particular the regeneration of used electrolyte compositions for electropolishing.

L'invention concerne un procédé de démétallisation de bains très acides à base d'acide phosphorique et sulfurique et un procédé de polissage électrolytique de surfaces en acier spécial. Par réduction électrolytique séparée de Fe(III) en Fe(II) et ensuite par séparation des substances précipitées, on peut notamment régénérer des compositions usées d'électrolyte utilisées pour le polissage électrolytique.

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