Magyar Aluminiumipari Troszt

Almasfuzitoi Timfoldgyar

Aluminiumipari Tervezo Es Kutato Intezet

Mta Geokemiai Kutatolaboratorium

Mihaly Miskei

Laszlo Revesz

Ferenc Toth

Miklos Schlegel

Tamas Lakatos

Janos Szolnoki

Gabor Sinka

The invention relates to a new a method for simultaneous recovering vanadium, molybdenum and gallium from alumina factory aluminate liquors. The recovering is carried out in one step by electrolyzing an alumina factory aluminate liquor a temperature exceeding 70.degree. C. with a current density of from 400 to 1200 A/m.sup.2 using a low-melting liquid alloy as a cathode and agitating said alloy mechanically. By using the new process the three precious metals can be recovered simultaneously in one step with good efficiencies without any preliminary treating of the aluminate liquor and without using any auxiliary chemical.

Process for simultaneous recovery of vanadium, molybdenum and gallium

The invention relates to a novel process for the selective recovery of the sodium content of red mud originating from alumina plants. According to the process of the invention red mud or a slurry thereof is admixed with a ferric sulfate solution, the resulting suspension is stirred intensively for 0.5 to 1 hour at 15 to 85.degree. C, thereafter, if necessary, the pH of the suspension is adjusted to 4.4 to 4.6 and the solid substance is removed from the suspension. Using the process of the invention the sodium oxide content of red mud can be reduced to below 1.5%.

Process for the selective separation of the bound sodium content of red

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Budapest, Hungary

Mihaly Miskei