Almasfuzitoi Timfoldgyar

Magyar Aluminiumipari Troszt

Femipari Kutato Intezet

Aluterv Aluminiumipari Tervezo Vallalat

Ajkai Timfoldgyar Es Aluminiumkoho

Jozsef Boros

Bela Toth

Karoly Solymar

Jozsef Zoldi

Istvan Voros

Gyula Horvath

Jozsef Matyasi

Laszlo Lengyel

Tibor Ferenczi

Janos Zambo

Maria Orban Nee Kelemen

Kalman Wentzely

Zsolt Csillag

Tibor Kalman

Peter Siklosi

Ferenc Sitkei

Ferenc Vallo

Tihamer Pinter

Ferenc Orban

Ferenc Lazar

Gyorgy Sigmond

Istvan Somosi

Janos Vitez

Lajos Toth

Gyorgy Baksa

Balazs Ihasz

Matyas Rainiss

Zoltan Pais

The invention relates to a process for the reduction of sodium hydroxide losses of the Bayer-cycle by modified causticization of red mud which comprises

Process for the reduction of the sodium hydroxide losses of the

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.

Process for accelerating the digestion and sedimentation steps on the

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.

Process for digesting goethite-containing bauxites according to the

A method of electrolytically recovering gallium and/or alkali metals from alkali metal solutions, preferably aluminate (sodium aluminate) liquors from aluminate production in which the gallium or alkali metal is electrolytically deposited on a mercury layer of the thickness of several microns applied to a metallic support which is more electronegative than mercury (preferably copper) by amalgamation or cementation from a mercury salt solution. The deposition of metals is carried out at a temperature below 50.degree. C and the cathode is then treated with a solvent, e.g. mercury or water, to remove the deposited elements.

Process for the electrolytic recovery of gallium and/or alkali metals

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Ajka, Hungary

Jozsef Boros