| 摘要 |
<p>PURPOSE:To efficiently recover Ru from Ru scraps or Ru oxide in the form of an aq. soln. by allowing the Ru scraps or Ru oxide to react with chlorine at a high temp., capturing the resulting volatile chloride with a specified capturing agent and carrying out treatment with water. CONSTITUTION:Ru scraps or Ru oxide 1 such as RuO4 is packed into a reaction tube 2 contg. silica sand 5 for heating gaseous chlorine, porous ceramics 4 and a ceramic filter 3 on the sand 5. An outer tube 10 is set around the tube 2 and an Ru chloride capturing agent 9 such as BaCl2, KCl, NaCl or CaCl2 is filled into the tube 10. Gaseous chlorine 6 is fed into the tube 2 from the bottom, heated to 700-1,200 deg.C with an electric furnace 7 and allowed to react with the Ru or RuO4 1. The resulting volatile Ru chloride is heated with an electric furnace 7 and allowed to react with the capturing agent 9 during passing through the tube 10 to form water soluble BaRuCl5, etc. This product is treated with water and the Ru or RuO4 is separated and recovered as an aq. soln. of BaRuCl5, etc.</p> |
