Teodorescu, LaviniaLaviniaTeodorescuIliescu, MirceaMirceaIliescuAlexandres, C.C.AlexandresAlexandres, A.A.Alexandres2017-04-222017-04-221984-01-30Patent no. RO 83009-Ahttp://hdl.handle.net/123456789/884Patent Assignee Name(s) and Code(s): INST EPURAREA APELOThe process comprises oxidn. of cast iron chips in aq. soln. of ammonium nitrate, 5-15 g/l. The reaction is carried out in the presence of 2-4 g/l hydrochloric acid or 3-5 g/l of ferric chloride. The reaction, at 85-100 degrees C, takes 2-5 hours.en-USMagnetiteMagnetite prepn. by oxidn. of cast iron chips in ammonium nitrate aq. soln. and hydrochloric acidProcedeu pentru obtinerea magnetiteiPatent