发明名称 |
SYNTHETISCHE, QUELLFÄHIGE TONMINERALE |
摘要 |
Synthetic clay minerals are made up of elementary three-layer platelets consisting of a central layer of octahedrally oxygen-surrounded metal ions (octahedron layer), which layer is surrounded by two tetrahedrally surrounded, silicon atom-containing layers (tetrahedron layers), a number of such elementary platelets being optionally stacked. The dimensions of the clay platelets vary from 0.01 mum to 1 mum, the number of the stacked elementary three-layer platelets varies from on average one platelet to twenty platelets, while in the octahedron layer at most 30 at. % of the metal ions has been replaced by ions of a lower valency and in the tetrahedron layers at most 15 at. % of the silicon ions has been replaced by ions of a lower valency, such a replacement having taken place in at least one of these layers and these layers having a deficiency of positive charge because of the replacement. They are prepared by bringing the pH of an aqueous liquid containing the components of the clay to a value of 3-9 and the temperature of the liquid to a value of from 60 to 350° C. and maintaining it at said value for the time required for the reaction, the pH being maintained at a value within said range. |
申请公布号 |
DE69521136(T2) |
申请公布日期 |
2002.03.21 |
申请号 |
DE1995621136T |
申请日期 |
1995.08.31 |
申请人 |
AKZO NOBEL N.V., ARNHEIM/ARNHEM;ENGELHARD DE MEERN B.V., DE MEERN;SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V., DEN HAAG/S'GRAVENHAGE |
发明人 |
VOGELS, JACOBUS;GEUS, WILHELM |
分类号 |
B01J20/16;B01J21/16;B01J29/04;B01J37/02;C01B33/40;C07C1/24;C07C2/66;C07C2/86;C07C4/06;C07C5/22;C07C29/04;C08F4/00;C08F4/02;C08F10/00;C10G11/04;C10G45/60;C10G47/12 |
主分类号 |
B01J20/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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