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MARSH BENJAMIN HARRISON
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MARSH BENJAMIN HARRISON
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Priority to ES0201375ApriorityCriticalpatent/ES201375A1/en
Publication of ES201375A1publicationCriticalpatent/ES201375A1/en
Process for the manufacture of red iron oxides comprising the steps of mixing an aqueous solution of ferrous sulfate with sodium hydroxide to form ferrous hydrate. Presenting the mixture then acid character and forming gases containing finely divided oxygen through the mixture in sufficient quantity to oxidize the ferrous precipitate in the ferric state in about 15 to 20 minutes by adding enough sodium hydroxide to bring the mixture to an alkaline state by passing gases containing finely divided oxygen through the mixture under pressure. In sufficient quantity to oxidize the ferrous iron content of the ferrous precipitate in about 15 to 20 minutes by adding enough aqueous ferrous sulfate to bring the mixture to the acid state by passing under pressure gases containing finely divided oxygen through the mixture in sufficient quantity to oxidize the ferrous iron content of the precipitate in the ferric state in approximately 15 to 20 minutes by adding metallic iron and supplying heat to maintain a high temperature by simultaneously passing gases containing finely divided oxygen through the mixture. (Machine-translation by Google Translate, not legally binding)
ES0201375A1952-01-111952-01-11A procedure for the manufacture of red iron oxides. (Machine-translation by Google Translate, not legally binding)
ExpiredES201375A1
(en)
A procedure for the preliminary chemical treatment of catalysts containing iron, intended especially to the hydrogenation of carbon oxide (Machine-translation by Google Translate, not legally binding)