A kind of method for preparing chloro-iridic acid

A kind of method for preparing chloro-iridic acid, the present invention first melts metal iridium powder with sodium chloride at high temperature, while adds a small amount of starch, is passed through chlorine into the melt of melting, strengthening the means of stirring by chlorine makes most of iridium powder be changed into iridium sodium chloride；The small part iridium chloride gas of output is then absorbed using dilute hydrochloric acid solution；After iridium sodium chloride obtained by high-temp chlorination melting reaction merges with watery hydrochloric acid absorbent solution, output hydroxide iridium after addition sodium hydroxide is neutralized, product is filtered and repeatedly washing removes sodium ion, is added dissolving with hydrochloric acid and is concentrated preparation output Chloroiridic Acid solution.Chlorine is passed through in melt by the present invention to be sufficiently stirred, and by the means of bath smelting, efficiently promotes the conversion of iridium, the leaching rate of iridium powder reaches more than 80%；Starch is added, the passivation on iridium powder surface in temperature-rise period can be avoided, promotes the abundant conversion of iridium powder, by carrying out two level absorption to tail gas, the comprehensive utilization of absorption by Hydrochloric Acid liquid is realized, improves the comprehensive recovery of iridium.