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Georgy P Tkachenko

Ivan M Kostin

Nikolai S Shmorgunenko

Leonid I Finkelshtein

Arkady A Belsky

Isaak A Zatulovsky

Raisa V Ivanova

Khoren A Badaliants

Nikolai A Novikov

Alexandr V Eljutin

Viktor M Sizyakov

Askar M Kunaev

Alexei I Alexeev

Alexandr V Peredereev

Anna E Danilina

Arkady I Zazubin

Elena L Shalavina

Leonid M Butorin

Pavel S Vladimirov

Tatyana D Ostapenko

Evgeny A Isakov

Petr F Minin

Teodor G Milberger

Gennady A Romanov

Garegin A Peikarov

Anatolia T Simanova

Natalya V Tishevetskaya

Leonid F Bilenko

Oleg V Alexeev

Vitaly L Aronzon

An improved method for recovering aluminum values from alkaline aluminosilicate raw material by sintering a comminuted aqueous mixture of the alkaline aluminosilicate material, limestone and soda solution wherein the alumino-silicate material is first comminuted with the soda solution to form a mixture with a fraction of particles larger than 0.08 mm greater than 20 percent by weight, mixing limestone with the mixture and comminuting until the fraction of particles larger than 0.08 mm is between 2 and 15 percent by weight.

Method for the production of alumina

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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Moscow, Russia

Georgy P Tkachenko