Patent ID: 7018950

Claim:
A process for producing a titanium-containing silicon oxide catalyst satisfying all of the following conditions (1) to (4): (1): an average pore diameter of 10 Å or more, (2): a pore diameter of 90% or more of the total pore volume of 5 to 200 Å, (3): a specific pore volume of 0.2 cm 3 /g or more, and (4): a quaternary ammonium ion represented by the following general formula (I) is used as a template and then the template is removed [NR 1 R 2 R 3 R 4 ] + (I), wherein, R 1 represents a linear or branched hydrocarbon group having 10 to 36 carbon atoms, and R 2 to R 4 represent an alkyl group having 1 to 6 carbon atoms which comprises the steps of: obtaining a solid containing a catalyst component and a template by mixing and stirring a silica source, a titanium source and, as the template, the quaternary ammonium ion to prepare a solid, wherein an amount of an alkali metal in the mixture prepared is within a range of the following expression (II) or (III), alkali metal/titanium≦3(mol/mol) (II) alkali metal/[NR 1 R 2 R 3 R 4 ] + ≦0.3(mol/mol) (III); molding the solid; removing the template from the molded solid by solvent extraction; recycling the template contained in the extracted liquid and reusing it; and subjecting the molded solid after removing the template to silylation to obtain a silylated catalyst.