Magnetic iron oxide pigments and a process for their preparation
    1.
    发明授权
    Magnetic iron oxide pigments and a process for their preparation 失效
    磁性氧化铁颜料及其制备方法

    公开(公告)号:US4933014A

    公开(公告)日:1990-06-12

    申请号:US90929

    申请日:1987-08-31

    IPC分类号: C01G49/00 G11B5/706 H01F1/11

    CPC分类号: G11B5/70647 Y10T428/2991

    摘要: Magnetic iron oxide pigments useful in magnetic signal recordings having a dependence of coercivity on temperature in the temperature range of from 76K to 298K of less than 0.13 kA/mK and having a coercivity on powder compressed to 0.9 g/cm.sup.3 of greater than 51 kA/m are prepared by coating a magnetic iron oxide core material having the composition FeO.sub.x where x is a number from 1.33 to 1.5 in a first step with a compound containing divalent and trivalent iron having a ratio of Fe(III): Fe(II) from 0.01 to less than 2, and then in a second step coating the pre-coated core with a second coating of a cobalt compound.

    摘要翻译: 磁性氧化铁颜料可用于具有小于0.13kA / mK的76K至298K的温度范围内矫顽力与温度相关的磁信号记录,并且具有压缩至0.9g / cm 3的粉末矫顽力大于51kA / m是通过在第一步中用含有Fe(III):Fe(II)的二价和三价铁的化合物涂覆具有组成FeO x的磁性氧化铁芯材料,其中x为1.33至1.5, 0.01至小于2,然后在第二步中用钴化合物的第二涂层涂覆预涂芯。

    Magnetic iron oxide pigments and a process for their preparation
    2.
    发明授权
    Magnetic iron oxide pigments and a process for their preparation 失效
    磁性氧化铁颜料及其制备方法

    公开(公告)号:US4923519A

    公开(公告)日:1990-05-08

    申请号:US91059

    申请日:1987-08-31

    IPC分类号: C01G49/00 G11B5/706 H01F1/11

    CPC分类号: G11B5/70647 Y10T428/2991

    摘要: Magnetic iron oxide pigments having a monomolecular coating of a cobalt compound useful in magnetic signal recordings having a dependence of coercivity on temperature in the temperature range of from 76 K to 298 K of less than 0.13 kA/mK and having a coercivity on powder compressed to 0.9 g/cm.sup.3 of greater than 51 kA/m are prepared applying a preliminary coating of Fe.sub.3 O.sub.4 or a bertholloid compound to a magnetic iron oxide core material having the composition FeO.sub.x where x is a number from 1.33 to 1.55 and then covering the preliminary coating with a cobalt compound.

    摘要翻译: 具有钴化合物的单分子涂层的磁性氧化铁颜料,其可用于在76K至298K的温度范围内的矫顽力与温度的相关性小于0.13kA / mK的磁信号记录,并且具有压缩至 制备大于51kA / m 3的0.9g / cm 3,其中将Fe 3 O 4或硼氢化合物的初步涂层施加到具有FeO x组成的磁性氧化铁芯材料,其中x为1.33至1.55的数值,然后用 钴化合物。

    Use of novel rotary tubular kiln
    3.
    发明授权
    Use of novel rotary tubular kiln 失效
    使用新型旋转管式窑

    公开(公告)号:US4629500A

    公开(公告)日:1986-12-16

    申请号:US637469

    申请日:1984-08-03

    摘要: In a rotary tubular kiln for carrying out gas-solids reactions, comprising an indirectly heated, rotatable reaction tube with inner baffles which is provided with charging and removing devices for solid and gas inlet and outlet lines, the improvement which comprises forming the baffles as a central tube which is sealed on both sides and runs along the total length of the kiln, and a spiral which is tightly connected to the central tube and also to the outer rotatable tube. Lifting blades are uniformly distributed along the inner periphery of the rotatable tube. The kiln is suitable for carrying out oxidation, reduction, chlorination, roasting, decomposition, catalytic, annealing and/or cooling processes, e.g. the conversion of hematite to magnetite or goethite to iron.

    摘要翻译: 在用于进行气体 - 固体反应的旋转管式窑中,包括具有内部挡板的间接加热的可旋转的反应管,其具有用于固体和气体入口和出口管线的装料和除油装置,其改进包括将挡板形成为 两侧密封并沿窑总长度延伸的中心管,以及与中心管以及外部可旋转管紧密连接的螺旋。 提升叶片沿着可旋转管的内周均匀分布。 窑炉适用于进行氧化,还原,氯化,焙烧,分解,催化,退火和/或冷却过程。 赤铁矿转变为磁铁矿或针铁矿转铁。

    Indirectly heated rotary tubular kiln
    9.
    发明授权
    Indirectly heated rotary tubular kiln 失效
    间接加热旋转管式窑

    公开(公告)号:US4781580A

    公开(公告)日:1988-11-01

    申请号:US51191

    申请日:1987-05-14

    摘要: In a rotary tubular kiln for carrying out gas-solids reactions, comprising an indirectly heated, rotatable reaction tube with inner baffles which is provided with charging and removing devices for solid and gas inlet and outlet lines, the improvement which comprises forming the baffles as a central tube which is sealed on both sides and runs along the total length of the kiln, and a spiral which is tightly connected to the central tube and also to the outer rotatable tube. Lifting blades are uniformly distributed along the inner periphery of the rotatable tube. The kiln is suitable for carrying out oxidation, reduction, chlorination, roasting, decomposition, catalytic, annealling and/or cooling processes, e.g. the conversion of hematite to magnetite or goethite to iron.

    摘要翻译: 在用于进行气体 - 固体反应的旋转管式窑中,包括具有内部挡板的间接加热的可旋转的反应管,其具有用于固体和气体入口和出口管线的装料和除油装置,其改进包括将挡板形成为 两侧密封并沿窑总长度延伸的中心管,以及与中心管以及外部可旋转管紧密连接的螺旋。 提升叶片沿着可旋转管的内周均匀分布。 窑炉适用于进行氧化,还原,氯化,焙烧,分解,催化,退火和/或冷却过程。 赤铁矿转变为磁铁矿或针铁矿转铁。

    Readily dispersible TiO.sub.2 pigment
    10.
    发明授权
    Readily dispersible TiO.sub.2 pigment 失效
    易分散的TiO2颜料

    公开(公告)号:US4344799A

    公开(公告)日:1982-08-17

    申请号:US203010

    申请日:1980-11-03

    IPC分类号: C09C1/36 C09C1/32 C09C3/00

    CPC分类号: C09C1/3692 C01P2004/84

    摘要: An inorganically after-treated TiO.sub.2 pigment with a coating of hydrophobicizing and hydrophilicizing organic substances, which pigment comprises more than about 95% by weight of TiO.sub.2, shows a loss on annealing of less than about 0.8% (after subtraction of the carbon content) and has a grindometer value smaller than about 30, corresponding to a value of more than about 5.6 on the Hegman scale, is produced by micronizing a mixture of an inorganically after-treated TiO.sub.2 pigment, an untreated TiO.sub.2 pigment and hydrophobicizing and hydrophilicizing organic substances, the after-treated pigment being employed in about 1 to 40% by weight of total TiO.sub.2 pigment and the hydrophobicing and hydrophilicizing substances being employed in about 0.3 to 5% by weight of TiO.sub.2 pigment. The pigments are readily dispersible which simplifies their use in pigmenting lacquers, plastics and paper.

    摘要翻译: 具有疏水化和亲水化有机物质的无机后处理的TiO 2颜料,该颜料包含大于约95重量%的TiO 2,退火时损失小于约0.8%(减去碳含量之后)和 通过将无机后处理的TiO 2颜料,未处理的TiO 2颜料和疏水化和亲水化的有机物质的混合物微粉化,产生小于约30的磨盘值,对应于Hegman规模的值大于约5.6, 后处理颜料用于总TiO 2颜料的约1至40重量%,并且疏水和亲水化物质用于约0.3至5重量%的TiO 2颜料。 颜料容易分散,这简化了它们在着色漆,塑料和纸张中的应用。