Reduction of residual chloride in iron oxides

Details Reduction of residual chloride in iron oxides Reduction of residual chloride in iron oxides

C - Chemistry, Metallurgy

01

G

C01G 49/02 (2006.01)

Patent

CA 2185437

A process for reducing the residual chloride present in iron oxides, particularly in regenerated iron oxides produced from hydrochloric acid waste liquid generated from steel pickling, by post-synthesis treatment of the iron oxides with sulfuric acid optionally followed by drying and calcining. The purified regenerated iron oxides are particular suitable for making iron oxide based catalysts such as ethylbenzene dehydrogenation catalysts and high-grade ferrites.

Procédé de réduction du chlorure résiduel présent dans des oxydes de fer, notamment dans des oxydes de fer régénérés obtenus à partir d'une liqueur résiduaire d'acide chlorhydrique provenant du décapage de l'acier, consistant à traiter à l'acide sulfurique des oxydes de fer après leur synthèse, puis, le cas échéant, à les sécher et à les calciner. Les oxydes de fer régénérés purifiés sont particulièrement appropriés pour préparer des catalyseurs à base d'oxyde de fer tels que des catalyseurs de déshydrogénation à l'éthylbenzène et des ferrites à haute teneur.

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