| abstract |
A carboxylic ester production catalyst which has higher catalytic activity. The catalyst, which is used for producing a carboxylic ester by reacting oxygen, an aldehyde, and an alcohol or (b) by reacting oxygen with one or more alcohols, comprises a support and deposited thereon (1) ultrafine gold particles having an average particle diameter of 6 nm or smaller and/or (2) metal particles comprising gold and a second element other than gold and having an average particle diameter of 6 nm or smaller. |