Patents by Inventor Janos Zambo

Janos Zambo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for accelerating the digestion and sedimentation steps on the Bayer alumina process
    Patent number: 4226838
    Abstract: An improved process for accelerating the digestion process in the Bayer alumina process is provided which promotes both the goethite-hematite conversion and a more perfect and quick dissolution of the diaspore. The above is achieved by carrying out the digestion in the process of 5-20% by weight calculated on the dry weight of the bauxite of a novel hydrogarnet catalyst.
    Type: Grant
    Filed: January 24, 1979
    Date of Patent: October 7, 1980
    Assignee: Almasfuzitoi Timfoldgyar
    Inventors: Jozsef Boros, Zsolt Csillag, Tibor Ferenczi, Tibor Kalman, Laszlo Lengyel, Jozsef Matyasi, Ferenc Orban, Karoly Solymar, Bela Toth, Lajos Toth, Istvan Voros, Kalman Wentzely, Janos Zambo, Jozsef Zoldi
  • Process for digesting goethite-containing bauxites according to the Bayer technology
    Patent number: 4091071
    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.
    Type: Grant
    Filed: December 23, 1975
    Date of Patent: May 23, 1978
    Assignees: Femipari Kutato Intezet, Aluterv Aluminiumipari Tervezo Vallalat, Almasfuzitoi Timfoldgyar
    Inventors: Jozsef Boros, Tibor Ferenczi, Gyula Horvath, Ferenc Lazar, Laszlo Lengyel, Jozsef Matyasi, Maria Orban nee Kelemen, Tihamer Pinter, Gyorgy Sigmond, Peter Siklosi, Karoly Solymar, Bela Toth, Istvan Voros, Kalman Wentzely, Janos Zambo, Jozsef Zoldi
  • Process for the digestion of goethite-containing bauxites
    Patent number: 4026989
    Abstract: The present invention provides for an improvement in the Bayer Aluminum manufacturing process wherein the digestion of goethite-containing bauxite is effected in higher yields, at lower temperatures and in a single step by carrying out said digestion in a wet caustic solution containing both calcium oxide and sodium chloride.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: May 31, 1977
    Assignees: Aluminiumipari Tervezo Vallalat, Femipari Kutato Intezet
    Inventors: Ferenc Orban, Maria Orban, Tihamer Pinter, Gyorgy Zsigmond, Peter Siklosi, Karoly Solymar, Pal Toth, Janos Zambo
  • Method for processing bauxites
    Patent number: 3944648
    Abstract: A method for processing bauxites according to the Bayer technology, with an increased yield in Al.sub.2 O.sub.3 and with decreased caustic soda losses, starting particularly from goethite bauxites of boehmite and/or diaspore type and carrying out the digestion at 180.degree.C to 300.degree.C using an aluminate liquor containing Na.sub.2 O.sub.caustic in a concentration of 80 to 300 g./l. The digestion is carried out in the presence of a calcium compound in an amount corresponding to 2 to 6 % of CaO calculated for the dry weight of bauxite and of a sulfate salt in an amount corresponding to 1.0 to 7.0 g./l. of sulfate ion concentration, whereby the goethite content of the bauxite is converted into hematite. The process provides advantageous conditions for the complete dissolution of the boehmite and diaspore content of bauxite in the vicinity of the equilibrium molar ratio, and enables to recover efficiently the caustic soda losses in the Bayer process itself, requiring no supplementary operation.
    Type: Grant
    Filed: July 3, 1974
    Date of Patent: March 16, 1976
    Assignees: Aluterv Aluminiumipari Tervezo Vallalat, Femipari Kutato Intezet, Almasfuzitoi Timfoldgyar
    Inventors: Karoly Solymar, Janos Zambo, Marika Orban nee Kelemen, Erno Bujdoso, Ivan Feher, Zoltan Ozvald, Istvan Voros, Tibor Ferenczi, Pal Toth, Ferenc Lazar, Tihamer Pinter, Gyorgy Sigmond, Peter Siklosi, Kalman Wentzely, Laszlo Lengyel, Jozsef Matyasi