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    Fine platy kaolin composition
    5.
    发明申请
    Fine platy kaolin composition 有权
    精细高岭土组成

    公开(公告)号：US20060124033A1

    公开(公告)日：2006-06-15

    申请号：US10531257

    申请日：2003-12-15

    申请人： Robert Pruett ,  Jun Yuan ,  Bomi Bilimoria ,  Roger Wygant ,  Anthony Lyons

    发明人： Robert Pruett ,  Jun Yuan ,  Bomi Bilimoria ,  Roger Wygant ,  Anthony Lyons

    IPC分类号： C04B14/04

    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。 该组合物可以包含具有至少约20的形状因子的高岭土。高岭土可以具有使得高岭土的至少约94重量％的esd可以具有小于约2μm的esd和/或至少 约80重量％的高岭土可以具有小于1m的esd。 具有小于约0.25μm的esd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。

    Method for separating mixture of finely divided minerals
    8.
    发明申请
    Method for separating mixture of finely divided minerals 有权
    分离细分矿物的混合物的方法

    公开(公告)号：US20060185557A1

    公开(公告)日：2006-08-24

    申请号：US11349216

    申请日：2006-02-08

    申请人： Michael Garska ,  Ismail Yildirum ,  Robert Pruett ,  Johnny Larimore

    发明人： Michael Garska ,  Ismail Yildirum ,  Robert Pruett ,  Johnny Larimore

    IPC分类号： C04B14/04 ,  C08K3/34

    CPC分类号： C09C1/42 ,  C01P2004/51 ,  C01P2004/62 ,  C01P2006/62 ,  C01P2006/63 ,  C01P2006/64 ,  C01P2006/80

    摘要： The Rio Capim Kaolin deposit contains a lower bed of soft kaolin clay that averages 10 meters thick, and an upper bed of “hard” kaolin (“RCC hard kaolin”) that may be as thick as 6 to 8 meters. Due to their high impurity content fine particle size, cementetious nature, and high degree of particle aggregation, hard kaolins are difficult to process. Disclosed herein are compositions comprising kaolin having a particle size distribution such that at least about 90% of the kaolin has a particle size of less than 1 micron and a GE brightness of at least about 91, where the kaolin may be derived from a crude kaolin having a Fe2O3 content of at least about 1.0% by weight, and optionally comprises titania in an amount of at least about 1.5% by weight. Also disclosed herein are methods of refining the hard kaolins, such as RCC hard kaolins, by dispersing the kaolin with at least one anionic organic dispersant and at least one inorganic dispersant. Also disclosed are compositions comprising an aqueous kaolin slurry comprising the hard kaolin, such as an RCC hard kaolin, at least one anionic organic dispersant, and at least one inorganic dispersant. Also disclosed are products containing the refined kaolin, such as paints, paper coatings, and plastics.

    摘要翻译： 里约Capim高岭土沉积物含有平均厚度为10米的软质高岭土粘土床，以及厚度可达6至8米的“硬”高岭​​土（“RCC硬质高岭土”）上层床。 由于杂质含量高，细粒度大，粘结性好，颗粒聚集度高，硬质高岭土难以加工。 本文公开了包含高岭土的组合物，其具有使得至少约90％的高岭土具有小于1微米的粒度和至少约91的GE亮度的粒度分布，其中高岭土可以衍生自粗高岭土 具有至少约1.0重量％的Fe 2 O 3 O 3含量，并且任选地包含至少约1.5重量％的量的二氧化钛。 本文还公开了通过用至少一种阴离子有机分散剂和至少一种无机分散剂分散高岭土来精制硬质高岭土如RCC硬质高岭土的方法。 还公开了包含包含硬质高岭土的水性高岭土浆料如RCC硬质高岭土，至少一种阴离子有机分散剂和至少一种无机分散剂的组合物。 还公开了含有精制高岭土的产品，如油漆，纸张涂料和塑料。

    Effective reductive bleaching of mineral slurries
    9.
    发明申请
    Effective reductive bleaching of mineral slurries 有权
    有效还原漂白矿浆

    公开(公告)号：US20070194276A1

    公开(公告)日：2007-08-23

    申请号：US10592142

    申请日：2005-03-22

    申请人： Jun Yuan ,  Robert Pruett ,  Larry Powell

    发明人： Jun Yuan ,  Robert Pruett ,  Larry Powell

    IPC分类号： C01B3/00

    CPC分类号： D21H19/44 ,  D21H19/385 ,  Y02E60/324

    摘要： Disclosed herein are a method of reductively bleaching a mineral slurry comprising adding in the mineral slurry an effective amount of a formamidine sulfinic acid (FAS) and an effective amount of a borohydride to reductively bleach the mineral slurry, compositions comprising a mineral slurry, a FAS, and a borohydride, and final products comprising a mineral obtained by the method disclosed herein.

    摘要翻译： 本文公开了一种还原性漂白矿物浆料的方法，包括在矿物浆料中加入有效量的甲脒亚磺酸（FAS）和有效量的硼氢化物以还原性漂白矿物浆料，包含矿物浆料，FAS 和硼氢化物，以及包含通过本文公开的方法获得的矿物的最终产品。

    Compositions comprising fine sedimentary kaolin and methods for preparing same
    10.
    发明申请
    Compositions comprising fine sedimentary kaolin and methods for preparing same 有权
    包含细沉淀高岭土的组合物及其制备方法

    公开(公告)号：US20060249051A1

    公开(公告)日：2006-11-09

    申请号：US11349213

    申请日：2006-02-08

    申请人： Robert Pruett ,  Paula Alves

    发明人： Robert Pruett ,  Paula Alves

    IPC分类号： C04B33/00 ,  C04B14/04

    CPC分类号： C04B33/04 ,  C01P2002/04 ,  C01P2004/03 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/60 ,  C01P2006/80 ,  C04B2235/5445 ,  C09C1/42

    摘要： Disclosed herein are kaolin compositions, such as beneficiated fine sedimentary kaolin compositions. The beneficiated fine sedimentary kaolins may be obtained from the upper bed of the Rio Capim Kaolin deposit. The compositions may have at least one property chosen from a low iron content and low Hinckley crystallinity index, such as Fe2O3 in an amount less than about 0.8% by weight relative to the total weight of the solids content and wherein the Hinckley crystallinity index of the kaolin is less than about 0.5. Also disclosed are products obtained therefrom, such as paint and paper coating compositions.

    摘要翻译： 本文公开了高岭土组合物，例如精选的沉淀高岭土组合物。 精选的沉积高岭土可以从里约Capim高岭土矿床的上层获得。 组合物可以具有选自低铁含量和低Hinckley结晶度指数的至少一种性质，例如小于约0.8重量％的Fe 2 O 3 O 3 相对于固体含量的总重量，其中高岭土的欣克利结晶度指数小于约0.5。 还公开了由其获得的产品，例如油漆和纸涂料组合物。