Process for producing titanium-containing silicon oxide catalyst

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 cm3/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
• [NR1R2R3R4]+ (I),
• wherein, R1 represents a linear or branched hydrocarbon group having 10 to 36 carbon atoms, and R2 to R4 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/[NR1R2R3R4]+≦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.