Being the grain to which the production mannered null substrate of the carboxylic acid ester which uses the gold support grain and the said grain which include

摘要

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