摘要 |
PURPOSE:To obtain a catalyst having high activity and a long life by impregnating an alcohol soln. contg. nitrate of a platinum group element in an inorg. carrier and heating the same under a reduction condition. CONSTITUTION:An alcohol soln. contg. nitrate of a platinum group element such as platinum, palladium, iridium, osmium, rhodium, ruthenium or the like is impregnated in an inorg. carrier of silica, alumina, silica alumina, zirconia, titania, or the like. The carrier is then heated under a reduction condition. The content of the nitric acid in the alcohol soln. contg. nitrate is required to be >=3 mole based on 1 gram atom the platinum group element to be deposited on the carrier. The preferable heating condition is 0.1-120min at 50-800 deg.C. |