Heat-stable iron oxide black pigments, processes for their production
and their use
    3.
    发明授权
    Heat-stable iron oxide black pigments, processes for their production and their use 失效
    热稳定的氧化铁黑色颜料及其生产工艺及其使用

    公开(公告)号:US5055136A

    公开(公告)日:1991-10-08

    申请号:US365839

    申请日:1989-06-14

    IPC分类号: C01G49/08 C04B14/30 C09C1/24

    摘要: A heat-stable iron oxide black pigment resistant to hydrothermal treatment in air at temperatures above 180.degree. C. and which has a specific BET surface of 0.5 to 5 m.sup.2 /g is useful as a coloring agent for building materials, paints, cements, bricks and so forth and is prepared by reacting an aqueous solution of FeOOH, iron (II) salts and alkalis at elevated temperature and precipitating iron oxide from the solution with Na.sub.2 CO.sub.3 at temperatures in the range from 80.degree. C. to the boiling point of the solution.

    摘要翻译: 在180℃以上的空气中耐热水处理的耐热稳定的氧化铁黑色颜料,其比表面积为0.5〜5m 2 / g,可用作建筑材料,油漆,水泥,砖的着色剂 等等,并通过使FeOOH,铁(II)盐和碱的水溶液在升高的温度下反应并用Na 2 CO 3从溶液中沉淀氧化铁,在80℃至该溶液的沸点 。

    Process for the preparation of bright, color-pure iron oxide red pigments
    7.
    发明授权
    Process for the preparation of bright, color-pure iron oxide red pigments 失效
    制备明亮,纯色的氧化铁红色颜料的方法

    公开(公告)号:US4753680A

    公开(公告)日:1988-06-28

    申请号:US813377

    申请日:1985-12-26

    摘要: A bright, color-pure iron oxide red pigment is produced by an improved process by precipitation of iron(II) salts in aqueous solution with an alkaline precipitating agent, oxidation at temperatures of from 20.degree. C. to 100.degree. C. and annealing of the resulting precipitation products under air to form iron oxide red pigments, wherein the improvement comprises before adding the alkaline precipitating agent, the iron(III) content of the aqueous solution is adjusted to 1 to 15 mol %, based on the total iron content of the iron salt solution.

    摘要翻译: 通过改进的方法通过用碱性沉淀剂在水溶液中沉淀铁(II)盐,在20℃至100℃的温度下进行氧化,并且将 所得沉淀产物在空气下形成氧化铁红色颜料,其中改进包括在加入碱性沉淀剂之前,将水溶液的铁(III)含量调节至1至15mol%,基于总铁含量 铁盐溶液。