Patent ID: 7700789

Claim:
A process for preparing an olefin oxidation catalyst, comprising: adding a tungstic acid compound to a solution of hydrogen peroxide; adding a phosphoric acid to the solution; diluting the solution with water; dispersing in the solution a polymer compound selected from the group consisting of polyimides, acrylamides, methacrylamides, polyamides and polyurethanes, or an organic compound of formula (1) wherein R 11 , R 12 and R 13 are independently of one another a hydrogen atom, a C 1-10 alkyl group (the C 1-10 alkyl group may be substituted by a C 6-10 aryl group), a C 3-10 cycloalkyl group, a C 6-10 aryl group, a C 1-6 alkylcarbonyl group (the C 1-6 alkylcarbonyl group may be substituted by a C 6-10 aryl group) or a C 6-10 arylcarbonyl group; and adding a solution of a quaternary ammonium salt of formula (2) or (3) wherein R 5 , R 6 , R 7 , R 8 and R 9 are independently of one another a hydrogen atom, a halogen atom, a cyano group, a C 1-10 alkyl group (the C 1-10 alkyl group may be substituted by a C 6-10 aryl group, a C 1-10 alkoxy group or a benzyloxy group), a C 1-10 alkoxy group, a benzyloxy group or a phenyl group, or any two of R 5 , R 6 , R 7 , R 8 and R 9 together may form 1 or 2 fused benzene rings, R 10 , R 14 , R 15 , R 16 and R 17 are independently of one another a C 1-20 alkyl group, and X is a halogen atom, to the solution.