发明名称 |
Synthetic mixed-layer silicate and method for the preparation thereof |
摘要 |
A novel synthetic mixed-layer silicate consisting of the layers of serpentine and layers of saponite each having a specified chemical composition is proposed, which has excellent dispersibility in water to form a colloidal dispersion capable of being converted into a gel by standing to be useful as a gelating agent exhibiting thixotropy along with unique porosity characteristics which enable the use thereof as an adsorbent. The mixed-layer silicate is prepared by the process comprising the steps of: (a) preparing an acidic aqueous solution containing silicic acid, magnesium salt and aluminum salt; (b) alkalifying the solution by the addition of an alkaline compound to precipitate a hydrous composite oxide containing silicon, magnesium and aluminum; (c) collecting the precipitates of the hydrous composite oxide; (d) admixing the precipitates of the hydrous composite oxide with an aqueous solution of an alkali metal hydroxide to give an aqueous slurry; and (e) subjecting the aqueous slurry of the hydrous composite oxide to a hydrothermal treatment by heating at a temperature up to 500 DEG C.
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申请公布号 |
US5595716(A) |
申请公布日期 |
1997.01.21 |
申请号 |
US19950516533 |
申请日期 |
1995.08.18 |
申请人 |
JAPAN AS DIRECTED BY DIRECTOR GENERAL OF AGENCY OF INDUSTRIAL SCIENCE AND TECHNOLOGY |
发明人 |
TORII, KAZUO;IWASAKI, TAKASHI;ONODERA, YOSHIO |
分类号 |
C01B33/38;B01J21/16;C01B33/40;(IPC1-7):C01B33/40 |
主分类号 |
C01B33/38 |
代理机构 |
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代理人 |
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主权项 |
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