Process for production of allyl acetate production catalyst
View Patent ↗An allyl acetate production catalyst comprising at least (a) palladium, (b) gold, (c) a compound containing at least one element selected from copper, nickel, zinc and cobalt, (d) an alkali metal salt compound and (e) a carrier, is produced by a process comprising step 1 in which a homogeneous solution of a palladium-containing compound and a gold-containing compound is supported on a carrier by contact therewith, step 2 in which the carrier obtained in step 1 is contacted with an alkali solution for impregnation, step 3 in which the carrier obtained in step 2 is subjected to reduction treatment, and step 4 in which a compound containing at least one element selected from copper, nickel, zinc and cobalt and an alkali metal salt compound are supported onto the carrier obtained in step 3. The obtained allyl acetate production catalyst has minimal reduction in activity and improved selectivity, when used for production of allyl acetate from propylene, oxygen and acetic acid.
1. A process for production of an allyl acetate production catalyst comprising (a) palladium, (b) gold, (c) a compound containing at least one element selected from copper, nickel, zinc and cobalt, (d) an alkali metal salt compound and (e) a carrier, the process being characterized by comprising the following steps:
Step 1: A step of preparing a homogeneous solution of a palladium-containing compound and a gold-containing compound, and contacting the solution with the (e) carrier to support both compounds on the carrier;
Step 2: A step of contacting (f) an alkali solution with the carrier obtained in step 1 for impregnation;
Step 3: A step of reduction treatment of the carrier obtained in step 2;
Step 4: A step of supporting (c) a compound containing at least one element selected from copper, nickel, zinc and cobalt and (d) an alkali metal salt compound on the carrier obtained in step 3, and
wherein the amount of (b) gold is 2.0-3.5 parts by mass with respect to 100 parts by mass of the (a) palladium.
2. The process for production of an allyl acetate production catalyst according to claim 1 , wherein the (c) compound containing at least one element selected from copper, nickel, zinc and cobalt is a compound containing copper or zinc.
3. The process for production of an allyl acetate production catalyst according to claim 2 , wherein the (c) compound containing at least one element selected from copper, nickel, zinc and cobalt is copper acetate.
4. The process for production of an allyl acetate production catalyst according to claim 1 , wherein the (d) alkali metal salt compound is at least one selected from potassium acetate, sodium acetate and cesium acetate.