| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for continuously producing a metal oxide sol at any uniform pH by mixing an aqueous metal oxo acid alkali metal salt solution and an inorganic acid.SOLUTION: When an aqueous metal oxo acid alkali metal salt solution and an inorganic acid are flown through mutually opposing pipes so as to be continuously collided and mixed, a pH meter is directly provided on the way of a discharge pipe, and the supply amount of the aqueous metal oxo acid alkali metal salt solution and/or the inorganic acid is adjusted from the indication value of the pH meter. This makes it possible to properly control pH. |
