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:
May. 23, 1978
Filed:
Dec. 23, 1975
Jozsef Boros, Ajka, HU;
Tibor Ferenczi, Tatabanya, HU;
Gyula Horvath, Budapest, HU;
Ferenc Lazar, Budapest, HU;
Laszlo Lengyel, Almasfuzito, HU;
Jozsef Matyasi, Almasfuzito, HU;
Maria Orban nee Kelemen, Budapest, HU;
Tihamer Pinter, Budapest, HU;
Gyorgy Sigmond, Budapest, HU;
Peter Siklosi, Budapest, HU;
Karoly Solymar, Budapest, HU;
Bela Toth, Ajka, HU;
Istvan Voros, Budapest, HU;
Kalman Wentzely, Almasfuzito, HU;
Janos Zambo, Budapest, HU;
Jozsef Zoldi, Tatabanya, HU;
Femipari Kutato Intezet, Budapest, HU;
Aluterv Aluminiumipari Tervezo Vallalat, Budapest, HU;
Almasfuzitoi Timfoldgyar, Almasfuzito, HU;
Abstract
The invention relates to an improved process for the production of alumina according to the Bayer technology, of bauxites containing goethite and especially of boehmitic or diasporic bauxites, for the acceleration of the digestion process, for the transformation of goethite into hematite, for the increase of alumina yield and for the reduction of the caustic soda losses, the essence of which consists in carrying out the digestion in the presence of 2-6% CaO and 0.2-2.0% Mg.sup.++, Fe.sup.++, Mn.sup.++ Co.sup.++ ions based on the weight of the dry bauxite or of compounds or ores containing these ions in the indicated quantities.