PROCESS FOR THE PREPARATION OF PRECIPITATED SILICAS, PRECIPITATED SILICAS AND THEIR USES, IN PARTICULAR FOR THE REINFORCEMENT OF POLYMERS
    2.
    发明申请
    PROCESS FOR THE PREPARATION OF PRECIPITATED SILICAS, PRECIPITATED SILICAS AND THEIR USES, IN PARTICULAR FOR THE REINFORCEMENT OF POLYMERS 审中-公开
    制备降解硅,沉淀硅和其用途的方法,特别是聚合物增强

    公开(公告)号:US20170051126A1

    公开(公告)日:2017-02-23

    申请号:US15118683

    申请日:2015-02-12

    申请人: RHODIA OPERATIONS

    IPC分类号: C08K3/36 C09C1/30 C01B33/187

    摘要: The invention relates to a process for the preparation of a novel precipitated silica, wherein: a silicate is reacted with an acidifying agent, so as to obtain a silica suspension; said silica suspension is filtered, so as to obtain a filter cake; said filter cake is subjected to a liquefaction operation, optionally in the presence of an aluminium compound; wherein at least one polycarboxylic acid is added to the filter cake, during or after the liquefaction operation. It also relates to a novel precipitated silica and to its uses.

    摘要翻译: 本发明涉及一种制备新型沉淀二氧化硅的方法,其中:将硅酸盐与酸化剂反应,得到二氧化硅悬浮液; 将所述二氧化硅悬浮液过滤,得到滤饼; 所述滤饼任选在铝化合物存在下进行液化操作; 其中在液化操作期间或之后,将至少一种多元羧酸加入到滤饼中。 它还涉及一种新型沉淀二氧化硅及其用途。

    NOVEL METHOD FOR PREPARING PRECIPITATED SILICAS CONTAINING ALUMINIUM
    4.
    发明申请
    NOVEL METHOD FOR PREPARING PRECIPITATED SILICAS CONTAINING ALUMINIUM 有权
    用于制备包含铝的预制硅的新方法

    公开(公告)号:US20130156674A1

    公开(公告)日:2013-06-20

    申请号:US13636995

    申请日:2011-03-25

    IPC分类号: C01B33/187

    CPC分类号: C01B33/187 C01B33/193

    摘要: A method for preparing precipitated silicas is described. A precipitation reaction between a silicate and an acidifying agent is also described, wherein a precipitated silica suspension is produced, and, subsequently, separation and drying of the suspension is conducted, in which, inter alia, one of the following three operations (a, b or c) is performed: (a) simultaneously adding a compound of aluminium and a basic agent, (b) simultaneously adding a silicate and a compound of aluminium, (c) simultaneously adding the acidifying agent, a silicate and a compound of aluminium.

    摘要翻译: 描述了制备沉淀二氧化硅的方法。 还描述了硅酸盐和酸化剂之间的沉淀反应,其中制备沉淀二氧化硅悬浮液,随后进行悬浮液的分离和干燥,其中尤其是以下三种操作之一(a, b或c):(a)同时加入铝和碱性试剂的化合物,(b)同时加入硅酸盐和铝化合物,(c)同​​时加入酸化剂,硅酸盐和铝化合物 。

    Method for manufacturing spherical silica from olivine
    6.
    发明授权
    Method for manufacturing spherical silica from olivine 失效
    从橄榄石制造球形二氧化硅的方法

    公开(公告)号:US5780005A

    公开(公告)日:1998-07-14

    申请号:US602772

    申请日:1996-03-04

    申请人: Svein Olerud

    发明人: Svein Olerud

    摘要: In a method for manufacturing silica a leaching of natural silicates is performed with hydrochloric acid or other mineral acids, draining, drying and possibly a grinding up of the residue of the product obtained. In order to obtain a spherical silica with a controlled particle size and surface characteristics a mineral olivine with the highest possible degree of purity is employed as the basic material. This raw material is reduced to a grain size between 0.05 and 5 mm. The particles are pretreated and washed for the removal of dust on the grain surfaces and heavy materials such as spinel and at least a part of the foliar and stem-like minerals such as serpentine, talc and pyroxene are removed. The olivine particles are then leached in a controlled leaching process where the acid concentration, leaching temperature and leaching time are controlled in order to achieve the desired primary particle size, specific surface and pore volume measured according to the BET method on the extracted silica. The particle agglomerate of spherical particles thus formed with a grain size between 30 and 70 nanometers are washed and dried in the conventional manner, whereupon the agglomerate is divided into the spherical particles.

    摘要翻译: PCT No.PCT / NO94 / 00145 Sec。 371日期:1996年3月4日 102(e)1996年3月4日PCT 1994年9月1日PCT PCT。 公开号WO95 / 07235 日期:1995年3月16日在二氧化硅的制造方法中,天然硅酸盐的浸出是用盐酸或其他无机酸进行的,排出,干燥和可能磨碎所得产品的残余物。 为了获得具有受控粒度和表面特性的球形二氧化硅,采用具有最高纯度的矿物橄榄石作为基础材料。 将该原料还原成0.05〜5mm的粒径。 颗粒被预处理并洗涤以去除颗粒表面上的灰尘,并且重要材料如尖晶石和至少一部分叶面和茎状矿物如蛇纹石,滑石和辉石被去除。 然后在受控浸出过程中浸出橄榄石颗粒,其中控制酸浓度,浸出温度和浸出时间,以获得根据提取的二氧化硅上的BET法测量的所需的一次粒径,比表面积和孔体积。 将由此形成的粒径在30和70纳米之间的球形颗粒的颗粒聚集体以常规方式洗涤和干燥,由此将附聚物分成球形颗粒。