• Title, Summary, Keyword: Monsanto catalyst

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Study on Dissolution Condition of Monsanto Catalyst (몬산토 촉매의 용해방법에 관한 연구)

  • Choi, Kwang Soon;Lee, Chang Heon;Pyo, Hyung Yeol;Park, Yang Soon;Joe, Kih Soo;Kim, Won Ho
    • Analytical Science and Technology
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    • v.14 no.4
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    • pp.317-323
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    • 2001
  • Dissolution procedures of Monsanto catalyst which has been used to produce acrylronitrile by ammoxidation of propylene have been studied. Optimum dissolution condition of the catalyst supported on silica was obtained by microwave digestion system with mixed of HCl, HF and $H_2O_2$. When a safety device was activated by increased pressure in microwave vessel, Bi, Fe, Mo, Sb and U were not volatilized even though silica was volatilized as $SiF_4$. Quantification results by this method were $SiO_2$ $50.5{\pm}0.4%$, $Sb_2O_3$ $29.6{\pm}0.6%$, $UO_2$ $10.2{\pm}0.1%$, $Fe_2O_3$ $6.1{\pm}0.1%$, $MoO_3$ $0.73{\pm}0.01%$ and $Bi_2O_3$ $0.49{\pm}0.01%$ by ICP-AES and the relative error was within ${\pm}10%$ except bismuth.

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