Method for the removal of organic substances from alkali...

Details Method for the removal of organic substances from alkali... Method for the removal of organic substances from alkali...

C - Chemistry, Metallurgy

22

B

53/236

C22B 21/04 (2006.01)

Patent

CA 1105265

Abstract of the Disclosure In the production of alumina from the bauxite by the Bayer process, the present invention provides an improvement for effectively and economically removing organic substances from a circulating alkali aluminate solution by contacting the aluminate solution containing organic substances with molecular oxygen gas or a molecular oxygen-containing gas in the presence of copper ions as a catalyst at an elevated temperature, thereby oxidizing the organic substances, adding a chemical substance, which reacts with copper ions to deposit a water-insoluble precipitate, to the resulting aluminate solution and separating the precipitate from the solution,and recycling the precipitate as a copper source to the above-mentioned wet oxidation procedure.

321679

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