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Study on Dissolution Condition of Monsanto Catalyst
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2001, v.14 no.4, pp.317-323
Choi,
K. S., Lee,
C. H., Pyo,
H. Y., Park,
Y. S., Joe,
K. S., &
Kim,
W.
H.
(2001). Study on Dissolution Condition of Monsanto Catalyst. Analytical Science and Technology, 14(4), 317-323.
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Abstract
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 <TEX>$H_2O_2$</TEX>. 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 <TEX>$SiF_4$</TEX>. Quantification results by this method were <TEX>$SiO_2$</TEX> <TEX>$50.5{\pm}0.4%$</TEX>, <TEX>$Sb_2O_3$</TEX> <TEX>$29.6{\pm}0.6%$</TEX>, <TEX>$UO_2$</TEX> <TEX>$10.2{\pm}0.1%$</TEX>, <TEX>$Fe_2O_3$</TEX> <TEX>$6.1{\pm}0.1%$</TEX>, <TEX>$MoO_3$</TEX> <TEX>$0.73{\pm}0.01%$</TEX> and <TEX>$Bi_2O_3$</TEX> <TEX>$0.49{\pm}0.01%$</TEX> by ICP-AES and the relative error was within <TEX>${\pm}10%$</TEX> except bismuth.
- keywords
- Monsanto catalyst, microwave digestion, HCl+HF+<TEX>$H_2O_2$</TEX>, ICP-AES
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