对加压氰化浸出过程Pt族金属(Pt, Pd, Rh)行为的研究表明, Pt族金属氰化浸出率的顺序为Pd >Pt >Rh, 而相应氰配合物高温下稳定性顺序为RhPt> Pd。浸出过程中的行为规律实际上反映的是表面态Pt族金属的化学反应活性顺序, 也即金属的原子态稳定性和金属键强度两种变化规律的综合表现。而Pt族金属氰配合物高温稳定性可以由“重Pt族配合物比相应结构的轻Pt族配合物的热力学稳定性更大, 动力学惰性更高”以及金属氰配离子。
Studies on behavior of platinum--group metals(PGMs) in pressure cyanide leaching indicate that the percent PGM extraction follows the order of Pd >Pt >Rh, while the chemical stability of PGM cyanide complexes at high temperature is RhPt > Pd. The leaching behavior of PGMs could be described by their chemical reaction activity of surface state, and is the synergetic influence of metal—bond strength and atomic--state stability. The high temperature stability of PGM cyanide complexes could be explained from the heavy platinum--group complexes having higher thermodynamic stability and kinetic inertia than light platinum--group complexes with same structure, and from the difference of chemical reaction activity of PGM cyanide complex ions.
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