发明名称 |
PRODUCTION OF SPHERICAL SILICA GEL |
摘要 |
PROBLEM TO BE SOLVED: To efficiently obtain solid spherical silica gel free from depression and crack and having high particle strength and sharp particle size distribution by separately and continuously feeding a silicic acid alkali solution and an acid solution to a rotating disk part of a rotating disk type spraying device and scattering the solutions as droplets of mixed solution. SOLUTION: A silicic acid alkali solution and an acid solution kept at >=15 deg.C are separately and continuously fed through a silicic acid alkali solution feed pipe 5 and an acid solution feed pipe 6 to a rotation disk part of rotation disk type spraying device in which a disk 3 is attached to the top of a rotation shaft 1 and a disk 2 is attached to the disk 3 by many binding pins 4. The silicic acid alkali solution is mixed with the acid solution between the disk 2 and the disk 3 and sprayed as droplets of mixed solution having pH 5 to 10 from between two disks into the atmosphere kept at >=20 deg.C. The sprayed droplets gel during scattering to provide spherical silica gel. The spherical silica gel is recovered and washed with water and dried and as necessary, subjected to baking treatment.
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申请公布号 |
JP2000272916(A) |
申请公布日期 |
2000.10.03 |
申请号 |
JP19990078542 |
申请日期 |
1999.03.23 |
申请人 |
ASAHI GLASS CO LTD |
发明人 |
KUSAKA MAKOTO;HIRANO HACHIRO;TANAKA MASAHARU;MORI HIROO |
分类号 |
C01B33/154;(IPC1-7):C01B33/154 |
主分类号 |
C01B33/154 |
代理机构 |
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代理人 |
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地址 |
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