PURPOSE: To obtain a homogeneous coprecipitated material, to treat large amount of a solution and to make working easy by changing pH of a mixed solution obtained into equal pH to precipitate the coprecipitated material by allowing the flow of a catalytic component contained solution to join with the flow of a precipitant solution in counter to each other in a flow passage.
CONSTITUTION: The catalytic component contained solution and the precipitant solution are respectively and simultaneously supplied from a pipe line 2 and a pipe line 2' by the use of a Y-tube 1 with a fixed flow rate. The solutions are mixed at the crossing part 4 of the Y-tube 1. The flows of the pipe line 2 and pipe line 2' are instantly joined because of joining in counter to each other. Thus, pH of the mixed solution rapidly changes to pH to precipitate the coprecipitated material to form the coprecipitating material. As a result, the coprecipitated material precipitates always at a specific pH and the obtained coprecipitated material is homogeneous. And working to produce is easy, mass production is possible and productivity is improved by continuous production.
Noriyuki Yasuda
Tomikawa Takayuki
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