The synthesis of new cation-exchanger based on local raw materials for the extraction of copper from copper-containing solution investigated. A review of the literature regarding the problem of ion exchange method and the use of mine wastewater treatment process is presented. Sorption selectivity of Cu2+ ions by cation exchanger in the H-and Na-forms from dilute solutions was studied in the target concentration range 90 mg/dm3 and 5,49 g/ dm3. The full dynamic exchange capacity calculated. The cation exchanger analyzed with consideration for IR spectroscopic, chemical analysis, and scanning electron microscopic data. Quantum-chemical calculations performed that synthesized cation-exchanger stable complexes with Cu2+ ions. Obtained cation exchanger due to excellent behavior recommended removing copper ions from wastewater in the mine industry.

Potassium diphenylketyl and benzophenone dianion react with aniline to afford N-(diphenylmethylene)aniline. Under analogous conditions, the corresponding sodium and lithium derivatives undergo disproportionation with formation of triphenylmethanol, benzoic acid, and diphenylmethanol. The condensation of potassium and sodium bis(4-dimethylaminophenyl)ketyls and salts with Michler's ketone dianion leads to formation of N-[bis(4-dimethylaminophenyl)methylene]aniline, while lithium bis(4-dimethylaminophenyl)ketyl and Michler's ketone dilithium salt are reduced to bis(4-dimethylaminophenyl)methanol.* As in Russian original.-Publisher.

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Polyphenylalkane derivativesPolyphenylalkane derivatives Q 0720 New Condensation of Potassium Diphenylketyl and Its Dianion with Aniline. -The different yields in both reactions are explained by the fact that in the first case potassium diphenylketyl is formed as reactive intermediate whereas in the second case benzophenone potassium dianion is formed. -(TURAEVA, D. A.; KURBATOV, Y. V.; Russ.