Process for the production of rutile mixed-phase pigments
    2.
    发明授权
    Process for the production of rutile mixed-phase pigments 失效
    用于生产金红石混合相颜料的方法

    公开(公告)号:US4919726A

    公开(公告)日:1990-04-24

    申请号:US298382

    申请日:1989-01-18

    IPC分类号: C01G23/00 C09C1/36

    CPC分类号: C09C1/36 C01P2002/30

    摘要: A process for the production of rutile mixed-phase pigments comprising calcinating of a solid mixture of titanium dioxide or titanium oxide hydroxide with a dye-producing compound of a metal, in one or more directly heated, continuously operated rotary kilns, wherein in terms of material flow, air is introduced into the kiln atmosphere countercurrently to the direction of flow of the solids in the second half of the rotary kiln.

    摘要翻译: 一种用于生产金红石混合相颜料的方法,包括在一个或多个直接加热的连续操作的旋转窑中煅烧二氧化钛或氧化钛氢氧化物与金属的染料产生化合物的固体混合物,其中以 材料流动,空气与回转窑后半部分固体的流动方向逆流地引入窑气氛中。

    Process for the preparation of pigments containing Cr.sub.2 O.sub.3
    5.
    发明授权
    Process for the preparation of pigments containing Cr.sub.2 O.sub.3 失效
    制备含有CR2O3的颜料的方法

    公开(公告)号:US5167708A

    公开(公告)日:1992-12-01

    申请号:US856351

    申请日:1992-03-23

    摘要: A process for the preparation of chromate-free, Cr.sub.2 O.sub.3 -containing pigments having a spinel, haematite or corundum structure comprises blending pigment-forming raw materials corresponding to the Cr.sub.2 O.sub.3 -containing pigments with from 0.5 to 10% by weight of boric acid or phosphoric acid, calculated as B.sub.2 O.sub.3 or P.sub.2 O.sub.5, respectively, and then annealing the blend whereby the chromate-free, Cr.sub.2 O.sub.3 -containing pigment is obtained.

    摘要翻译: 用于制备具有尖晶石,赤铁矿或刚玉结构的不含铬酸盐的含Cr2O3的颜料的方法包括将对应于含Cr2O3的颜料的颜料形成原料与0.5至10重量%的硼酸或磷酸 ,分别计算为B2O3或P2O5,然后对共混物进行退火,由此得到含铬酸盐的含Cr2O3的颜料。