| 摘要 |
PURPOSE:To produce a catalyst supporting rhodium in a high yield by adding a weakly basic nitrate selected among ammonium nitrate and the nitrates of rare earth elements to a rhodium-contg. soln. acidified with nitric acid in a specified ratio to the rhodium. CONSTITUTION:The weakly basic nitrate selected among ammonium nitrate and the nitrates of rare earth elements such as Ra and Ce is added to the rhodium-contg. soln. acidified with nitric acid by %i0.1mol per 1mol rhodium to produce the rhodium-contg. soln. for producing the catalyst for purification of exhaust gas. By using the produced soln., rhodium can be supported on a carrier in the high yield without deteriorating the initial performance of the resulting catalyst. |
