Water treatment
    2.
    发明授权
    Water treatment 失效
    水处理

    公开(公告)号:US6051141A

    公开(公告)日:2000-04-18

    申请号:US018876

    申请日:1998-02-05

    CPC分类号: C02F1/281 C02F1/60

    摘要: A method of treating water containing silicon-containing impurities in a concentration of up to 10,000 parts per million by weight of the water, by contacting the water over a period of time with a particulate solid which entrains silicon-containing impurities in the water and subsequently separating the water from the particulate solid, wherein the particulate solid is a high alumina cement which is anhydrous when first contacted by the water.

    摘要翻译: 一种处理水含量高于万份重量百分比的含硅杂质的方法,通过使水在一段时间内与水中含有杂质的微粒固体接触,然后 将水与颗粒状固体分离,其中颗粒状固体是当首先与水接触时是无水的高铝水泥。

    Cementitious compositions and their uses
    3.
    发明授权
    Cementitious compositions and their uses 失效
    水泥组合物及其用途

    公开(公告)号:US5958131A

    公开(公告)日:1999-09-28

    申请号:US992887

    申请日:1997-12-18

    摘要: A composition suitable for adding to water to produce a water-resistant hydraulic solid which composition comprises components (a), (b) and (c) as follows:(a) calcium sulphate hemihydrate;(b) portland cement;(c) calcined clay having a pozzolanic activity;wherein the percentages by weight of components (a), (b) and (c) in the said composition are in the respective ranges:(a) from 20% to 98%;(b) from 1% to 50%;(c) from 1% to 30%;the percentages of components (a), (b) and (c) adding to 100% in the three component composition.

    摘要翻译: 一种适于添加到水中以生产耐水硬性固体的组合物,其组合物包含组分(a),(b)和(c)如下:(a)硫酸钙半水合物; (b)波特兰水泥; (c)具有火山灰活性的煅烧粘土; 其中所述组合物中组分(a),(b)和(c)的重量百分数在各自的范围内:(a)20%至98%; (b)1%至50%; (c)1%至30%; 组分(a),(b)和(c)在三组分组合物中加入100%的百分比。