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Leonid I Finkelshtein

Ivan M Kostin

Nikolai S Shmorgunenko

Isaak A Zatulovsky

Raisa V Ivanova

Alexandr V Eljutin

Khoren A Badaliants

Nikolai A Novikov

Alexandr V Peredereev

Georgy P Tkachenko

Arkady I Zazubin

Elena L Shalavina

Leonid M Butorin

Tatyana D Ostapenko

Anna E Danilina

Arkady A Belsky

Alexei I Alexeev

Askar M Kunaev

Nikolai Ivanovich Eremin

Viktor M Sizyakov

Mikhail Ivanovich Zaitsev

Pavel S Vladimirov

Evgeny A Isakov

Anatolia T Simanova

Gennady A Panasko

Natalya V Tishevetskaya

Leonid F Bilenko

Garegin A Peikarov

Ioan V Davydov

Oleg V Alexeev

Avgusta I Samoilova

Vitaly L Aronzon

Ljubov B Samaryanova

Larisa I Sinelnikova

Greogy I Lazarev

Evgeny M Steshenko

Vladimir V Krasavin

Petr V Fedorin

Anatolia I Simanova

Petr F Minin

Teodor G Milberger

Jury N Evseev

Gennady A Romanov

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

The starting aluminate-alkaline solutions are subjected to two-stage carbonization with stirring and the production of hydrate of aluminum oxide, a gallium-containing precipitate, and solutions containing caustic and bicarbonate alkali, thereafter the produced gallium-containing precipitate is mixed with a solution containing caustic alkali to achieve a content of gallium in the solution of 0.05 to 1 g/l, the precipitate thus formed is separated and the solution enriched with gallium is mixed with a solution containing bicarbonate alkali, the produced mixture is evaporated to separate compounds of alkali metals, and the evaporated solution is carbonized to produce a solution containing alkali metal salts, and a gallium concentrate from which gallium is produced by transforming it into alkaline solution and subsequently reducing electrochemically. The proposed method makes it possible to extract gallium at a comparatively low cost from solutions in the processing, for example, of nephelines containing it in amounts which do not exceed 0.02 to 0.03 g/l. Owing to the proposed method it has become possible in the processes of concentration of gallium to produce a number of valuable components such as alkali metal salts contained in the starting ore.

Method for extraction of gallium from aluminate-alkaline solutions in

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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Achinsk Krasnoyarskogo kraya, undefined

Leonid I Finkelshtein