| 简介 |
PROBLEM TO BE SOLVED : To provide a gold-deposited particle exhibiting low chemical resistance, excellent chemical stability and excellent abrasion resistance and keeping high reactivity stably in a method for producing carboxylate by reacting aldehyde with alcohol or alcohols in the presence of oxygen. SOLUTION : The gold-deposited particle contains silica, Al, zirconia and an alkali metal and/or an alkaline-earth metal in a carrier wherein the atomic ratio of the alkali metal and/or the alkaline-earth metal to Al, that of Al to Si and that of Zr to Si satisfy the expressions : ((the alkali metal)+0.5x(alkaline-earth metal))/Al≥0.5, Al/Si=0.02-0.8 and Zr/Si=0.5-10.0, respectively. The gold-deposited particle is obtained by depositing gold on such a carrier. COPYRIGHT : (C)2008, JPO&INPIT |
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