Immobilized zincate

Immobilized zincates such as 177 can be prepared by treating serine-bound 4-iodobenzoate with f-BusZnLi at They react readily with aldehydes. 

Immobilized zincates such as 177 can be prepared by treating serine-bound 4-iodobenzoate with t-BujZnLi at 0°C. They react readily with aldehydes. Transme-tallation with lithium (2-thienyl)cyanocuprate provides the copper species 178 that undergoes 1,4-additions. Lithium trialkylzincates can be used for the preparation of benzylic zinc reagents using a very elegant approach of Harada. Thus, the treat-... 

When chromium and arsenic are present as an oxyanions, they are not to be precipitated as a hydroxides even if the pH of the solution is in the alkaline region. Immobilization of chromate, arsenate and arsenite ions using calcium alumino-zincate is described in this review. It should be noted that the oxyanions of hexavalent chromium and those of both trivalent and pentavalent arsenic are referred to as Cr[VI], As[nr, and As[V], respectively, in this manuscript. 

H. Sango, M. Hirano, M. Murakami and M. Sugano, Immobilization of Arsenite and Arsenate Ions in Aqueous Sample Using Calcium Alumino-zincate, Proceedings of 13th International Congress on the Chemistry of Cement, No.257, 2011. 

In this study, aiming to apply the system for removal of selenium from contaminated waste water, immobilization of selenium into the hydrate of calcium alumino-zincate has been studied. To further enhance the immobilization efficiency, adding calcium hydroxide to the present system, its effect on sorption of selenium by hydration of calcium alumino-zincate has been studied and stoichiometrically discussed. 

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