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Vsesojuzny Nauchno-issledovatelsky I Proektny Institut Aljuminievoi,

Evgeny A Isakov

Ivan M Kostin

Isaak A Zatulovsky

Nikolai A Kaluzhsky

Arkady A Belsky

Nikolai S Shmorgunenko

Raisa V Ivanova

Askar M Kunaev

Khoren A Badaliants

Viktor M Sizyakov

Alexandr V Eljutin

Alexei I Alexeev

Nikolai A Novikov

Leonid I Finkelshtein

Alexandr V Peredereev

Arkady I Zazubin

Elena L Shalavina

Georgy P Tkachenko

Pavel S Vladimirov

Anna E Danilina

Leonid M Butorin

Tatyana D Ostapenko

Khoren A Badaiants

Galina M Vysotskaya

Leonid I Finkelshtein, Deceased

Evgeny I Mironov

Julia L Finkelshtein, Administrator

Garegin A Peikarov

Nina J Finkelshtein, Administrator

Evgenia S Ostrovlyanchik

Teodor G Milberger

Anatolia T Simanova

Natalya V Tishevetskaya

Vinetsy I Chernov

Gennady A Romanov

Zarya N Alexandrova

Valentin N Afanasiev

Alexandr G Zhukov

Petr F Minin

Viktor S Kutsenko

The present invention relates to the production of alumina and, more specifically, to a process for desilication of aluminate solutions. The process of desilication according to the present invention comprises treatment of the aluminate solution first with a calcium-containing reagent 'a' which is a product of the reaction of desilication of the aluminate solution; reagent 'a' contains mainly calcium hydrogarnet of the formula:

Process for desilication of aluminate solution

A process for recovering gallium from alkali aluminate solutions which consists in that the starting alkali aluminate solution is neutralized to a concentration of the caustic alkali of from 0.1 to 10 g/l, whereafter the neutralized liquor is evaporated to a concentration of the caustic alkali therein of from 30 to 150 g/l. Then the evaporated solution is corrected to obtain the ratio between the alkali metal oxide and alumina of above 2.0. The corrected solution is treated with a liquid alloy of gallium containing an element possessing an oxidizing potential exceeding that of gallium to give a concentrate containing more than 90% of gallium by mass, wherafter gallium of a higher purity grade is recovered from the resulting concentrate by the electrochemical method. The process according to the present invention makes it possible to recover gallium from alkali solutions resulting from the treatment of nephelines with the production of a 90% gallium concentrate, wherefrom gallium of an increased purity is obtained at relatively low cost. Processing of the concentrate with the production of gallium is simple, it is not encountered with any additional expenses and requires no additional equipment. Another advantage of the process resides in a more comprehensive utilization of low-grade aluminum-containing ores.

Process for recovering gallium from alkali aluminate solutions resulting

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Pikalevo Leningradskoi oblasti, undefined

Evgeny A Isakov