TREATING KAOLINITIC CLAYS
    71.
    发明公开
    TREATING KAOLINITIC CLAYS 审中-公开
    治疗高岭TONE

    公开(公告)号:EP1156991A1

    公开(公告)日:2001-11-28

    申请号:EP00907756.1

    申请日:2000-02-28

    IPC分类号: C04B33/04

    CPC分类号: C04B33/04 Y10S106/04

    摘要: A method of treating a kaolinitic clay which is intended for use as an ingredient in a ceramic composition which method comprises the steps of:(a) mixing with the kaolinitic clay from 0.1% to 15.0% by weight, based on the dry weight of the kaolinitic clay, of a smectite clay; and(b) subjecting a mass in a moist plastic state of the clay mixture formed in step (a) to mechanical working under conditions such that there is dissipated in the moist plastic mass at least 5 kJ of energy per kilogram of clay mixture on a dry weight basis.

    IMPROVED ORGANOCLAY COMPOSITIONS
    73.
    发明公开
    IMPROVED ORGANOCLAY COMPOSITIONS 失效
    有机粘土成分

    公开(公告)号:EP0848692A4

    公开(公告)日:1999-07-21

    申请号:EP96930734

    申请日:1996-09-06

    IPC分类号: C09K3/00 C04B33/04 C09D7/12

    CPC分类号: C04B33/04

    摘要: Organoclay compositions which comprise the reaction product of a smectite-type clay having an ion exchange capacity of at least 50 meq. wt. per 100 g. clay (active basis), and an alkoxylated quaternary ammonium compound having one or two alkoxylated chains containing 0-10 moles ethylene oxide and 3-15 moles of propylene or butylene oxide residues are useful thixotropic materials, especially for the preparation of aqueous systems.

    The treatment of mineral surfaces
    80.
    发明公开
    The treatment of mineral surfaces 失效
    Behandlung von mineralischenOberflächen。

    公开(公告)号:EP0453260A1

    公开(公告)日:1991-10-23

    申请号:EP91303419.5

    申请日:1991-04-17

    摘要: A treatment method for chemically removing discolouring transition metal oxide contaminants from the surfaces of mineral particles to improve their brightness is provided. The method involves the contacting of the mineral particles with a solution of sulphur dioxide in water whilst simultaneously activating the sulphur dioxide to a reducing sulphur containing species to reduce transition metals and render them soluble. Dissolution of the reduced transition metals is effected by utilising excess sulphur dioxide or by employing a mineral acid such as sulphuric acid in solution.

    摘要翻译: 提供了一种用于从矿物颗粒表面化学去除变色过渡金属氧化物污染物以提高其亮度的处理方法。 该方法包括使矿物颗粒与二氧化硫在水中的溶液接触,同时将二氧化硫活化成还原硫物质以减少过渡金属并使其变得可溶。 还原的过渡金属的溶解通过利用过量的二氧化硫或通过在溶液中使用无机酸如硫酸来实现。