A catalyst for a hydrogenation reaction including: a polymer support; and a catalytic component supported on the polymer support. The polymer support comprises a repeating unit represented by Formula 1.

A catalyst for a hydrogenation reaction including: a polymer support; and a catalytic component supported on the polymer support. The polymer support comprises a repeating unit represented by Formula 1.

A method for producing a crosslinked polyarylene sulfide resin (PAS resin) that reduces a difference in melt viscosity among lots and has excellent quality stability is provided. Further specifically, the method includes steps of compression-molding an uncrosslinked PAS resin in a powder form to obtain a compression-molded material, measuring a true specific gravity of the compression-molded material, grinding the compression-molded product having a specific range of true specific gravity to obtain a pulverized material, granulating the pulverized material to obtain a granulated material, and oxidatively crosslinking the granulated material obtained in the above step. Also provided are a method for producing a composition containing the crosslinked PAS, and a method for producing a molded article by melt-molding the composition.

A method for producing a crosslinked polyarylene sulfide resin (PAS resin) that reduces a difference in melt viscosity among lots and has excellent quality stability is provided. Further specifically, the method includes steps of compression-molding an uncrosslinked PAS resin in a powder form to obtain a compression-molded material, measuring a true specific gravity of the compression-molded material, grinding the compression-molded product having a specific range of true specific gravity to obtain a pulverized material, granulating the pulverized material to obtain a granulated material, and oxidatively crosslinking the granulated material obtained in the above step. Also provided are a method for producing a composition containing the crosslinked PAS, and a method for producing a molded article by melt-molding the composition.

The present invention aims to provide a method for producing a sulfur-containing polymer such as polyarylene sulfide which has few by-products in the polymerization reaction and little effect caused by the catalyst residue used, on optical properties or other properties. The present invention relates to a method for producing a sulfur-containing polymer, the method including polymerizing a monomer component containing at least one of a disulfide compound or a thiol compound using a catalyst, the catalyst containing an iron-containing substance, an amount of iron in the iron-containing substance being 50 mol % or less relative to 100 mol % of the monomer component.

The present invention aims to provide a method for producing a sulfur-containing polymer such as polyarylene sulfide which has few by-products in the polymerization reaction and little effect caused by the catalyst residue used, on optical properties or other properties. The present invention relates to a method for producing a sulfur-containing polymer, the method including polymerizing a monomer component containing at least one of a disulfide compound or a thiol compound using a catalyst, the catalyst containing an iron-containing substance, an amount of iron in the iron-containing substance being 50 mol % or less relative to 100 mol % of the monomer component.

A catalyst for a hydrogenation reaction including: a polymer support; and a catalytic component supported on the polymer support. The polymer support comprises a repeating unit represented by Formula 1.

A catalyst for a hydrogenation reaction including: a polymer support; and a catalytic component supported on the polymer support. The polymer support comprises a repeating unit represented by Formula 1.

A catalyst for a hydrogenation reaction including: a polymer support; and a catalytic component supported on the polymer support. The polymer support comprises a repeating unit represented by Formula 1.

A catalyst for a hydrogenation reaction including: a polymer support; and a catalytic component supported on the polymer support. The polymer support comprises a repeating unit represented by Formula 1.