Synthetic swelling clay minerals
    2.
    发明授权
    Synthetic swelling clay minerals 失效
    合成膨润土矿物

    公开(公告)号:US06187710B1

    公开(公告)日:2001-02-13

    申请号:US08793684

    申请日:1997-11-10

    IPC分类号: B01J2116

    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 &mgr;m to 1 &mgr;m, 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 % of the metal ions has been replaced by ions of a lower valency and in the tetrahedron layers at most 15 at. % of the silicon ions has been replaced by ions of a lower valency, such a replacement having taken place in at least one of these layers and these layers having a deficiency of positive charge because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.

    摘要翻译: 合成粘土矿物由基本的三层血小板组成,由三层氧包围的金属离子(八面体层)组成,该层由两个四面体包围的含硅原子的层(四面体层)包围, 的这种基本血小板可选地堆叠。 粘土血小板的尺寸从0.01mum到1um不等,层叠的基本三层血小板的数量从平均一个血小板变化到二十个血小板,而在八面体层中最多为30个。 %的金属离子已被低价离子替代,并且在四面体层中最多为15个。 硅离子的百分比已经被较低价的离子代替,这种替代物已经发生在这些层中的至少一个层中,并且这些层由于更换而具有正电荷不足。 它们是通过将含有粘土成分的含水液体的pH值设为3-9,液体的温度为60-350℃,并将其保持在所述值的时间 反应所需的pH值保持在所述范围内。