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    Process for producing a kaolin clay product
    8.
    发明授权
    Process for producing a kaolin clay product 失效
    生产KAOLIN粘土产品的方法

    公开(公告)号：US5223463A

    公开(公告)日：1993-06-29

    申请号：US738911

    申请日：1991-08-01

    申请人： Bomi M. Bilimoria ,  William E. Thompson

    发明人： Bomi M. Bilimoria ,  William E. Thompson

    IPC分类号： B28C1/08 ,  C04B33/10 ,  C04B33/30

    CPC分类号： C04B33/30 ,  B28C1/082 ,  C04B33/10 ,  Y02P40/63

    摘要： A process for producing a high brightness, high solids kaolin clay aqueous slurry. An aqueous low solids suspension of crude kaolin clay is degritted, and subjected to a particle size classification. The aqueous suspension of the fine particle fraction is acidified to a pH of 5.0 or lower to produce an acid flocculated suspension which is treated with a bleaching agent to reduce ferric ion impurities to ferrous ion impurities. A ferrous ion chelating agent is added to the bleached acid flocculated suspension after which an alkaline agent is added to raise the pH to a level greater than 5.0 to form a dispersed aqueous suspension of the beneficiated kaolin. The dispersed suspension is then subjected to membrane filtration to partially dewater same, and additional water is thermally evaporated from the partially dewatered dispersed kaolin suspension to produce the high solids product suspension.

    摘要翻译： 一种生产高亮度，高固含量高岭土含水浆料的方法。 将粗高岭土粘土的低含量低固体含量悬浮液磨碎，并进行粒度分级。 将细颗粒级分的水性悬浮液酸化至pH5.0以下，得到用漂白剂处理的酸性絮凝悬浮液，将铁离子杂质还原为亚铁离子杂质。 向漂白的酸絮凝悬浮液中加入亚铁离子螯合剂，之后加入碱性试剂以将pH升高至大于5.0的水平，形成选择性高岭土的分散水悬浮液。 然后将分散的悬浮液进行膜过滤以部分脱水，并且从部分脱水的分散的高岭土悬浮液中热蒸发另外的水以产生高固体产物悬浮液。

    Fine platy kaolin composition
    9.
    发明授权
    Fine platy kaolin composition 有权
    精细高岭土组成

    公开(公告)号：US07806978B2

    公开(公告)日：2010-10-05

    申请号：US10531257

    申请日：2003-12-15

    申请人： Robert J. Pruett ,  Jun Yuan ,  Bomi M. Bilimoria ,  Roger W. Wygant ,  Anthony V. Lyons

    发明人： Robert J. Pruett ,  Jun Yuan ,  Bomi M. Bilimoria ,  Roger W. Wygant ,  Anthony V. Lyons

    IPC分类号： C04B14/04 ,  C01F5/24

    CPC分类号： C09C1/42 ,  C01P2004/20 ,  C01P2004/54 ,  C01P2004/60 ,  C01P2006/22 ,  D21H19/40 ,  D21H21/52

    摘要： The present invention relates to a kaolin composition having improved physical properties, for example, for use in the production of paper products. The composition can comprise kaolin having a shape factor of at least about 20. The kaolin can have a particle size distribution such that at least about 94% by weight of the kaolin can have an esd of less than about 2 μm and/or at least about 80% by weight of the kaolin can have an esd of less than 1 μm. The amount of the kaolin having an esd of less than about 0.25 μm can range from about 25% to about 60% by weight. The Hercules viscosity of the kaolin product is less than 4000 rpm at 18 dynes at 63% solids and less than 1500 rpm at 18 dynes at 69% solids when measured using the “A” bob. The present invention also relates to an improved method for making the kaolin product from sedimentary kaolin.

    摘要翻译： 本发明涉及具有改善的物理性能的高岭土组合物，例如用于生产纸制品。 组合物可以包含至少约20的形状因子的高岭土。高岭土可以具有使得至少约94重量％的高岭土具有小于约2μm的esd和/或至少 约80重量％的高岭土可以具有小于1μm的esd。 esd小于约0.25μm的高岭土的量可以为约25重量％至约60重量％。 高岭土产品的Hercules粘度在18达因数时为63％固体，小于1500转/分钟，18达因时为69％固体，当使用“A”鲍伯测量时。 本发明还涉及一种由沉淀高岭土制备高岭土产品的改进方法。

    Brightness, reduced impurity clays and methods of making same
    10.
    发明授权
    Brightness, reduced impurity clays and methods of making same 失效
    亮度，减少杂质粘土及其制作方法

    公开(公告)号：US6006920A

    公开(公告)日：1999-12-28

    申请号：US853536

    申请日：1997-05-09

    申请人： Bomi M. Bilimoria ,  Mark S. Willis

    发明人： Bomi M. Bilimoria ,  Mark S. Willis

    IPC分类号： B03C1/00 ,  B03C1/01 ,  C01B33/40 ,  B03B1/04

    CPC分类号： B03C1/002 ,  B03C1/01 ,  C01B33/40

    摘要： Provided is a method of making improved brightness kaolin clay from an aqueous kaolin clay slurry in which the primary active dispersant is a weak dispersant, at least including the steps of adding to the kaolin clay an effective magnet enhancer reagent wherein the magnet enhancer reagent comprises an aqueous solution of one or more magnetic oxides and one or more surface active agents; conditioning the kaolin clay; and performing high gradient magnetic separation on the conditioned kaolin clay to produce an improved brightness kaolin clay. The method is also applied to decreasing iron- and/or titania-containing impurities in a clay.

    摘要翻译： 本发明提供一种从高分子水溶性高岭土制备改性亮度高岭土的方法，其中主要活性分散剂是弱分散剂，至少包括以下步骤：向高岭土中加入有效的磁体增强剂，其中磁体增强剂试剂包含 一种或多种氧化物和一种或多种表面活性剂的水溶液; 调理高岭土; 并在调理的高岭土上进行高梯度磁选分离以产生改进的亮度高岭土。 该方法也适用于减少粘土中含铁和/或二氧化钛的杂质。