Process for preparing a magnetic talcous composition, and magnetic talcous composition
    208.
    发明授权
    Process for preparing a magnetic talcous composition, and magnetic talcous composition 有权
    磁性滑石组合物的制备方法和磁性滑石组合物

    公开(公告)号:US09570217B2

    公开(公告)日:2017-02-14

    申请号:US14367690

    申请日:2012-12-21

    Abstract: A process for preparing a magnetic talcous composition including mineral particles, referred to as magnetic talcous particles, having a non-zero magnetic susceptibility, in which, during an oxidative contacting step, talcous particles chosen from the group formed from 2:1 lamellar silicates having a zero electric charge are brought into contact with particles including at least one magnetic iron oxide chosen from the group formed from magnetite and maghemite, the magnetic particles having a mean equivalent diameter of between 1 nm and 50 nm. A magnetic talcous composition including mineral particles, referred to as magnetic talcous particles, having a non-zero magnetic susceptibility, at least 20% by weight of talcous particles and at least 0.5% by weight of magnetic particles is also described.

    Abstract translation: 一种制备磁性滑石组合物的方法,该组合物包括被称为磁性滑石颗粒的矿物颗粒,具有非零磁化率,其中在氧化接触步骤期间,选自2:1层状硅酸盐形成的基团中的滑石颗粒具有 使零电荷与包括从由磁铁矿和磁赤铁矿形成的组中选择的至少一种磁性氧化铁的颗粒接触,磁性颗粒的平均当量直径在1nm和50nm之间。 还描述了包括具有非零磁化率的磁性滑石粉,至少20重量%的滑石粉和至少0.5重量%的磁性颗粒的矿物颗粒的磁性滑石组合物。

Patent Agency Ranking