Journal of the Less-Common Metals p. 287 - 292 (1991)
Update date:2022-09-26
Topics:
Knothe
During handling of a reaction product of Pt(IV)-hydrochloric acid with hydroxylamine NH2OH) a serious accident occurred in a precious metal plant. Investigations for the reason for this accident showed that, during reactions of Pt(II)/Pt(IV)-chlorocomplexes with hydroxylamine at pH-values greater than 7, precipitation products of various compositions can form. During small additions of hydroxylamine Pt-oxidehydrates, which built in NH2OH form and with an excess of NH2OH, well defined Pt(II)-hydroxylamine-complexes form. Above a critical concentration of NH2OH all precipitation products were explosive. In addition to their tendency to explode, the composition of these products can vary strongly so extreme care during their handling has to be taken.
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