Patent ID: 11896959
Assignee: JGC CATALYSTS AND CHEMICALS LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B

Claim 14:
15. The method for producing a hydrotreating catalyst according to claim 14, wherein the step (1) of providing the inorganic composite oxide carrier comprises:
a step (a) of adding a silica source and a phosphorus component to a basic aqueous solution of an aluminum salt to prepare a basic mixed aqueous solution containing a basic aluminum salt, and adding an acidic aqueous solution of an aluminum salt to the mixed aqueous solution;
a first aging step (b) of aging the inorganic composite oxide hydrate slurry obtained in the step (a);
a step (c) of washing the aged inorganic composite oxide hydrate slurry obtained in the step (b);
a second aging step (d) of aging the washed inorganic composite oxide hydrate slurry obtained in the step (c);
a step (e) of kneading and concentrating the aged inorganic composite oxide hydrate slurry obtained in the step (d) and molding the obtained kneaded product; and
a step (f) of drying and calcining the molded product obtained in the step (e).