Patent ID: 11958039
Assignee: DAIICHI KIGENSO KAGAKU KOGYO CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B

Claim 10:
11. A method for producing the zirconia-based porous body according to claim 1, the method comprising:
step A of adding a sulfating agent solution to a zirconium salt solution at 100° C. or higher to produce basic zirconium sulfate;
step B of cooling the basic zirconium sulfate obtained in the step A to 80° C. or lower;
step C of aging the basic zirconium sulfate at a higher temperature than in the step A for 60 minutes or more after the step B;
step D of adding an alkali to a reaction liquid containing the basic zirconium sulfate after aging obtained in the step C to obtain a zirconium-containing hydroxide; and
step E of subjecting the zirconium-containing hydroxide obtained in the step D to heat treatment to obtain a zirconia-based porous body.