| 摘要 |
PROBLEM TO BE SOLVED: To efficiently produce silica sol which is uniform, substantially free from gelled matter, and not gelling in a short period of time, in the method for obtaining silica sol by contacting a sodium silicate solution with a mineral acid, both fed using a Y-shaped reactor. SOLUTION: In this method for producing silica sol, a Y-shaped reactor is used where two raw-material supply tubes confluent and a discharge tube is connected at the meeting place. A mineral acid and a sodium silicate solution are each supplied via the raw material supply tubes. A reaction product obtained by contacting both components at the meeting place is made to flow out from the discharge tube at a flow rate of≥1.0 m/s. COPYRIGHT: (C)2003,JPO
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