Uranyl zinc acetate

Uranyl zinc acetate (ZnUO₂(CH₃COO)₄)is a compound of uranium.

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Uranyl zinc acetate is used as a laboratory reagent in the determination of sodium concentrations of solutions using a method of quantitatively precipitating sodium with uranyl zinc acetate and gravimetrically determining the sodium as uranyl zinc sodium acetate, (UO₂)₂ZnNa(CH₃OO)-6H₂O. This method was important to determine Na in urine for diagnostic purposes. Zinc uranyl acetate is sometimes called "sodium reagent" since pale yellow NaZn(UO₂)₃(C₂H₃O₂)₉ is one of the very few insoluble sodium compounds.

The process for catalytic synthesis of toluene-2,4-diisocyanate (TDI) from dimethyl carbonate (DMC) consists of two steps. Starting from the catalytic reaction between toluene-2,4-diamine (TDA) and DMC, dimethyl toluene-2,4-dicarbamate (TDC) is formed, and then decomposed to TDI. For the first step, the yield of TDC is 53.5% at a temperature of 250 °C, over Zn(OAc)2/alpha–Al2O3 catalyst. For the second step, the yield of TDI is 92.6% at temperatures of 250–270 °C and under pressure of 2.7 kPa, over uranyl zinc acetate catalyst, when di-n-octyl sebacate(DOS) is used as heat-carrier, and a mixture of tetrahydrofuran (THF) and nitrobenzene is used as solvent.

References

• Catalytic synthesis of toluene-2,4-diisocyanate from dimethyl carbonate, Wang Y.1; Zhao X.; Li F.; Wang S.1; Zhang J., Journal of Chemical Technology & Biotechnology, 2001, 78, 857-861.