METHOD FOR PRODUCING ETHYL ACETATE PRODUCTION CATALYST
Provided is a method for producing an ethyl acetate production catalyst that has high producibility and exceptional catalytic performance, the catalyst being such that a heteropolyacid and/or a salt thereof is carried near the surface of a carrier. A method for producing an ethyl acetate production catalyst, the method including, in the stated order: (1) an impregnation step in which a silica carrier is impregnated with an aqueous solution of a heteropolyacid or a salt thereof, constituting 80-105 vol % of the saturation absorption capacity of the carrier, to form an impregnated body; and (2) a drying step in which the impregnated body is dried at a fixed-rate drying speed of 5-300 g H2O /kg supcat ·min.
1 . A method for producing an ethyl acetate production catalyst, comprising, in this order:
(1) an impregnation step of impregnating a silica carrier with an aqueous solution of a heteropolyacid or a salt thereof in an amount of 80 to 105% by volume of the saturated water absorption capacity of the carrier to form an impregnated body, and
(2) a drying step of drying the impregnated body at a constant drying rate of 5 to 300 g H2O /kg supcat ·min.
2 . The method for producing an ethyl acetate production catalyst according to claim 1 , wherein the constant drying rate in the drying step is 10 to 150 g H2O /kg supcat ·min.
3 . The method for producing an ethyl acetate production catalyst according to claim 1 , wherein the constant drying rate in the drying step is 15 to 50 g H2O /kg supcat ·min.
4 . The method for producing an ethyl acetate production catalyst according to claim 1 , wherein a temperature of a drying medium used in the drying step is 80 to 130° C.
5 . The method for producing an ethyl acetate production catalyst according to claim 1 , wherein a drying medium in the drying step is air having a relative humidity of 0 to 60% RH, and the air is brought into contact with the impregnated body as an air flow to dry the impregnated body.
6 . The method for producing an ethyl acetate production catalyst according to claim 1 , wherein a pressure in the drying step is normal pressure.
7 . A method for producing ethyl acetate using ethylene and acetic acid as raw materials, wherein a reaction is carried out in the presence of an ethyl acetate production catalyst produced by the method according to claim 1 .