The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 1982
Filed:
Apr. 08, 1981
Bela Czegledi, Pecs, HU;
Mihaly Csovari, Pecs, HU;
Miklos Erdelyi, Pecs, HU;
Lajos Streker, Pecs, HU;
Istvan Toth, Pecs, HU;
Katalin Szabo nee Mogyorosi, Tatabanya, HU;
Szilard Riederauer, Budapest, HU;
Geza Szentgyorgyi, Tatabanya, HU;
Tatabanyai Szenbanyak, Tatabanya, HU;
Abstract
The invention concerns a process for the preparation of alumina and ferric oxide from low-grade aluminium and iron carriers. The processes, in addition to conventional technological steps, comprises the steps of dissolving the iron content of a ground, mineral material in an aqueous hydrochloric acid solution containing 200 to 420 g./lit. of hydrochloric acid at 90.degree. to 130.degree. C., eliminating the iron from the slurry of from a solution obtained by filtration of the slurry, with an anion exchange resin or semipermeable membrane or cloth, continuously or discontinuously, eluting the iron from the ion exchange resin and recycling hydrochloric acid and sulfuric acid in a closed system.