Palladium-containing catalyst, method for producing same, and method for producing alpha, beta-unsaturated carboxylic acid

Abstract

Disclosed is a palladium-containing catalyst which enables to produce an α,β-unsaturated carboxylic acid in high selectivity from an olefin or an α,β-unsaturated aldehyde. Also disclosed are a method for producing such a catalyst and a method for producing an α,β-unsaturated carboxylic acid using such a catalyst. Specifically disclosed is a palladium-containing catalyst containing 0.001 to 0.25 mole of antimony element to 1 mole of palladium element or a palladium-containing catalyst containing palladium element which composes a metal, tellurium element, and bismuth element.

1 . A palladium-containing catalyst for producing an α,β-unsaturated carboxylic acid from an olefin or an α,β-unsaturated aldehyde, comprising 0.001 to 0.25 mole of antimony element to 1 mole of palladium element. 
   
   
       2 . The palladium-containing catalyst according to  claim 1 , further comprising 0.001 to 0.4 mole of tellurium element to 1 mole of palladium element. 
   
   
       3 . A palladium-containing catalyst for producing an α,β-unsaturated carboxylic acid from an olefin or an α,β-unsaturated aldehyde, comprising palladium element which composes a metal, tellurium element, and bismuth element. 
   
   
       4 . A method for producing the palladium-containing catalyst of  claim 1  comprising:
 reducing a compound containing palladium element in an oxidized state with a reducing agent; and   reducing a compound containing antimony element in an oxidized state with a reducing agent.   
   
   
       5 . A method for producing the palladium-containing catalyst of  claim 3  comprising:
 reducing a compound containing palladium element in an oxidized state, a compound containing tellurium element in an oxidized state, and a compound containing bismuth element in an oxidized state with a reducing agent.   
   
   
       6 . A method for producing an α,β-unsaturated carboxylic acid comprising:
 carrying out oxidation of an olefin or an α,β-unsaturated aldehyde with molecular oxygen in a liquid-phase using the palladium-containing catalyst of  claim 1 .   
   
   
       7 . A method for producing the palladium-containing catalyst of  claim 2  comprising:
 reducing a compound containing palladium element in an oxidized state with a reducing agent; and   reducing a compound containing antimony element in an oxidized state with a reducing agent.   
   
   
       8 . A method for producing an α,β-unsaturated carboxylic acid comprising:
 carrying out oxidation of an olefin or an α,β-unsaturated aldehyde with molecular oxygen in a liquid-phase using the palladium-containing catalyst of  claim 2 .   
   
   
       9 . A method for producing an α,β-unsaturated carboxylic acid comprising:
 carrying out oxidation of an olefin or an α,β-unsaturated aldehyde with molecular oxygen in a liquid-phase using the palladium-containing catalyst of  claim 3 .