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    Precipitated silicas
    2.
    发明授权
    Precipitated silicas 失效
    沉淀二氧化硅

    公开(公告)号：US5846506A

    公开(公告)日：1998-12-08

    申请号：US891448

    申请日：1997-07-10

    申请人： Heinz Esch ,  Udo Gorl ,  Robert Kuhlmann ,  Ralf Rausch

    发明人： Heinz Esch ,  Udo Gorl ,  Robert Kuhlmann ,  Ralf Rausch

    IPC分类号： C01B33/193 ,  C01B33/142

    CPC分类号： C01B33/193 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/19

    摘要： A precipitated silica with the following physicochemical properties: ______________________________________ BET surface area 35 to 350 m.sup.2 /g BET/CTAB surface area ratio 0.8 to 1.1 Pore volume, PV 1.6 to 3.4 ml/g Silanol group density (V2 = 6 to 20 ml NaOH consumption) Average aggregate size 250 to 1500 nm CTAB surface area 30 to 350 m.sup.2 /g DBP value 150 to 300 ml/100 g V.sub.2 /V.sub.1 by Hg porosimetry 0.19 to 0.46 DBP/CTAB 1.2 to 2.4. ______________________________________ is produced by reacting alkali silicate with mineral acids at temperatures of 60.degree. to 95.degree. C. while maintaining a pH of 7.5 to 10.5 and continuously stirring, continuing the reaction to a solids concentration in the precipitation suspension of 90 to 120 g/l, adjusting the pH value to a value of less than or equal to 5, filtering out, washing, drying and optionally grinding or granulating the precipitated silica. The precipitated silica is used as a filler in vulcanizable rubber compounds and vulcanizates.

    摘要翻译： 具有以下物理化学性质的沉淀二氧化硅：BET表面积35至350m 2 / g-BET / CTAB表面积比0.8至1.1-孔体积，PV 1.6至3.4ml / g - 硅烷醇密度（V2 = 6至20 ml - NaOH消耗） - 平均骨料大小250至1500nm - CTAB表面积30至350m 2 / g - DBP值150至300ml / 100g -V2 / V1通过Hg孔隙率法0.19至0.46-DBP / CTAB 1.2至2.4 。 - 通过使碱性硅酸盐与无机酸在60℃至95℃的温度下反应，同时保持pH为7.5至10.5并连续搅拌，将反应持续至90至120g / l的沉淀悬浮液中的固体浓度 ，将pH值调节至小于或等于5的值，过滤，洗涤，干燥和任选研磨或造粒沉淀二氧化硅。 沉淀二氧化硅用作可硫化橡胶化合物和硫化橡胶中的填料。

    Silica sol
    6.
    发明授权
    Silica sol 有权

    公开(公告)号：US09771271B2

    公开(公告)日：2017-09-26

    申请号：US14910330

    申请日：2014-08-20

    申请人： Akzo Nobel Chemicals International B.V.

    发明人： Erik Sanne ,  Freddie Hansson

    IPC分类号： D21H21/10 ,  C01B33/143 ,  C01B33/141 ,  C01B33/142 ,  C01B33/145 ,  D21H17/37 ,  D21H17/68 ,  D21H19/40 ,  C01B33/14

    CPC分类号： C01B33/143 ,  C01B33/14 ,  C01B33/141 ,  C01B33/142 ,  C01B33/145 ,  D21H17/375 ,  D21H17/68 ,  D21H19/40 ,  D21H21/10

    摘要： The present invention relates to a silica sol having a pH above about 10, molar ratio of SiO2:M2O, in which M is alkali metal, of from about 6:1 to about 16:1, concentration of soluble silica above about 3000 mg SiO2/l, and S-value of from about 18 to about 40%. The invention further relates to a process for producing a silica sol which comprises acidifying an aqueous alkali metal silicate solution to a pH of from 1 to 4 to form an acid sol, alkalizing the acid sol by addition of aqueous alkali metal silicate solution to obtain an intermediate sol and interrupt the addition of aqueous alkali metal silicate solution when the intermediate sol has reached a pH of from about 5 to about 8, stirring the intermediate sol for a time period of from about 10 to about 6000 seconds without addition of aqueous alkali metal silicate solution, alkalizing the intermediate sol by addition of aqueous alkali metal silicate solution to obtain a silica sol having a pH above about 10 and molar ratio of SiO2:M2O, in which M is alkali metal, of from about 6:1 to about 16:1, and optionally adding an aluminum compound to the acid sol, intermediate sol or silica sol. The invention further relates to a silica sol obtainable by the process of the invention. The invention further relates to the use of the silica sol as a flocculating agent, in water purification and in producing paper and board. The invention further relates to a process for producing paper and board which comprises: (i) providing an aqueous suspension comprising cellulosic fibers; (ii) adding to the suspension one or more drainage and retention aids comprising the silica sol; and (iii) dewatering the obtained suspension to provide a sheet or web of paper or board.

    Layered nanoparticles
    7.
    发明授权
    Layered nanoparticles 有权
    层状纳米粒子

    公开(公告)号：US09295654B2

    公开(公告)日：2016-03-29

    申请号：US14477525

    申请日：2014-09-04

    申请人： AUSTRALIAN NUCLEAR SCIENCE & TECHNOLOGY ORGANISATION

    发明人： Christophe Jean Alexandre Barbe ,  Linggen Kong

    IPC分类号： A61K9/14 ,  A61K9/16 ,  A61K9/50 ,  A61K9/00 ,  A61K9/51 ,  A61K47/02 ,  C01B33/142 ,  C01B33/149 ,  A61K49/00 ,  A61K51/12

    CPC分类号： A61K9/5115 ,  A61K9/5192 ,  A61K47/02 ,  A61K49/0093 ,  A61K51/1244 ,  C01B33/142 ,  C01B33/149 ,  Y10T428/2991

    摘要： The invention provides a process for forming a layered nanoparticle, comprising providing a suspension comprising a core particle in a first liquid, adding a second liquid to the suspension, and adding a reagent, or a precursor for the reagent, to the suspension. The second liquid is immiscible with the first liquid. If the reagent is added to the suspension, the reagent reacts to form a layer on the core particle to form the layered nanoparticle. If a precursor for the reagent is added to the suspension, the precursor is converted to the reagent, and the reagent reacts to form a layer on the core particle to form the layered nanoparticle.

    摘要翻译： 本发明提供一种形成层状纳米颗粒的方法，包括提供在第一液体中包含核心颗粒的悬浮液，向悬浮液中加入第二液体，并向试剂中加入试剂或试剂前体。 第二液体与第一液体不混溶。 如果将试剂加入到悬浮液中，则试剂在核心颗粒上反应形成层，形成层状纳米颗粒。 如果将试剂的前体加入悬浮液中，则将前体转化为试剂，并且试剂在核心颗粒上反应形成层以形成层状纳米颗粒。

    Silica Sol
    10.
    发明申请
    Silica Sol 审中-公开

    公开(公告)号：US20170355606A1

    公开(公告)日：2017-12-14

    申请号：US15688355

    申请日：2017-08-28

    申请人： Erik Sanne ,  Freddie Hansson

    发明人： Erik Sanne ,  Freddie Hansson

    IPC分类号： C01B33/143 ,  C01B33/141 ,  C01B33/145 ,  C01B33/142 ,  D21H19/40 ,  D21H21/10 ,  D21H17/37 ,  D21H17/68 ,  C01B33/14

    CPC分类号： C01B33/143 ,  C01B33/14 ,  C01B33/141 ,  C01B33/142 ,  C01B33/145 ,  D21H17/375 ,  D21H17/68 ,  D21H19/40 ,  D21H21/10

    摘要： The present invention relates to a silica sol having a pH above about 10, molar ratio of Si02:M20, in which M is alkali metal, of from about 6:1 to about 16:1, concentration of soluble silica above about 3000 mg Si02/l, and S-value of from about 18 to about 40%. The invention further relates to a process for producing a silica sol which comprises acidifying an aqueous alkali metal silicate solution to a pH of from 1 to 4 to form an acid sol, alkalizing the acid sol by addition of aqueous alkali metal silicate solution to obtain an intermediate sol and interrupt the addition of aqueous alkali metal silicate solution when the intermediate sol has reached a pH of from about 5 to about 8, stirring the intermediate sol for a time period of from about 10 to about 6000 seconds without addition of aqueous alkali metal silicate solution, alkalizing the intermediate sol by addition of aqueous alkali metal silicate solution to obtain a silica sol having a pH above about 10 and molar ratio of Si02:M20, in which M is alkali metal, of from about 6:1 to about 16:1, and optionally adding an aluminum compound to the acid sol, intermediate sol or silica sol. The invention further relates to a silica sol obtainable by the process of the invention. The invention further relates to the use of the silica sol as a flocculating agent, in water purification and in producing paper and board. The invention further relates to a process for producing paper and board which comprises: (i) providing an aqueous suspension comprising cellulosic fibers; (ii) adding to the suspension one or more drainage and retention aids comprising the silica sol; and (iii) dewatering the obtained suspension to provide a sheet or web of paper or board.