Metal-supported catalyst and method for producing hydrogenated conjugated-diene-based polymer

Abstract

A metal-supported catalyst is obtained by supporting a metal and/or a metal compound on a carrier, wherein a rate of decrease in the metal and/or the metal compound contained in the metal-supported catalyst is 20 wt % or more when the metal-supported catalyst is shaken in an aqueous solution of 2.3 wt % of polyvinylpyrrolidone in a hydrogen atmosphere at a temperature of 50° C. at 36 rpm for 1 hour.

1 . A metal-supported catalyst obtained by supporting a metal and/or a metal compound on a carrier, wherein a rate of decrease in the metal and/or the metal compound contained in the metal-supported catalyst is 20 wt % or more when the metal-supported catalyst is shaken in an aqueous solution of 2.3 wt % of polyvinylpyrrolidone in a hydrogen atmosphere at a temperature of 50° C. at 36 rpm for 1 hour. 
     
     
         2 . The metal-supported catalyst according to  claim 1 , wherein the metal and/or the metal compound is obtained by supporting a platinum group element and/or a platinum group element-containing compound on a carrier. 
     
     
         3 . The metal-supported catalyst according to  claim 1 , wherein a weight average molecular weight, in terms of polystyrene, of polyvinylpyrrolidone contained in the aqueous solution of polyvinylpyrrolidone is 8,000 to 12,000. 
     
     
         4 . The metal-supported catalyst according to  claim 1 , wherein a 50% cumulative diameter in a volume-based particle size distribution is more than 0 μm and 100 μm or less. 
     
     
         5 . The metal-supported catalyst according to  claim 1 , wherein a 50% cumulative diameter in a number-based particle size distribution is more than 0 μm and 2 μm or less. 
     
     
         6 . A method for producing a hydrogenated, conjugated diene-based polymer, comprising hydrogenating a conjugated diene-based polymer in a solvent in the presence of the metal-supported catalyst according to  claim 1 .