| abstract |
(57) [Problem] To provide zirconium hydroxide capable of providing a solid acidic substance having excellent solid acidity with good reproducibility, and to provide the solid acidic substance. [MEANS FOR SOLVING PROBLEMS] 1 for infrared absorption spectrum measurement Zirconium hydroxide having two or more infrared absorption bands at 300 to 1700 cm -1 . 2. Hydroxidation having a first step of preparing a slurry by hydrolyzing an aqueous solution of a soluble zirconium salt, a second step of adding a base to the slurry to form a hydroxide, and a third step of separating and recovering the hydroxide A method for producing zirconium. |