利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

4 条记录 (耗时 0.017 秒)

    Production of magnetic iron oxides
    3.
    发明授权
    Production of magnetic iron oxides 失效
    生产磁性氧化铁

    公开(公告)号：US4358431A

    公开(公告)日：1982-11-09

    申请号：US286134

    申请日：1981-07-23

    申请人： Horst Brunn ,  Peter Kiemle ,  Franz Hund ,  Heribert Bade

    发明人： Horst Brunn ,  Peter Kiemle ,  Franz Hund ,  Heribert Bade

    IPC分类号： C01G49/02 ,  C01G49/06 ,  G11B5/706 ,  H01F1/10 ,  H01F1/11 ,  C01G49/08

    CPC分类号： G11B5/70642 ,  C01G49/06 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/61 ,  C01P2006/42

    摘要： In the production of needle-shaped magnetic iron oxide pigments by treating iron with a nitro-aromatic in the presence of .alpha.-FeOOH nuclei to form .alpha.-FeOOH particles and an amino-aromatic, and thereafter dehydrating the .alpha.-FeOOH particles and reducing them, the improvement which comprises forming the .alpha.-FeOOH nuclei at about 0.degree. to 90.degree. C. in a suspension of metallic iron, an iron-(II)-salt and a nitro-aromatic by adding a basic precipitant in about 10 to 95% of the amount required for the complete precipitation of the iron in the iron-(II)-salt. Advantageously the metallic iron comprises cast iron, the nitro-aromatic comprises nitrobenzene, the amino-aromatic comprises aniline, the basic precipitant comprises at least one of ammonia and a basically reacting alkali metal, alkaline earth metal or ammonium salt, the nuclei formation is carried out at about 10.degree. to 60.degree. C., and the basic precipitant is added in about 20 to 80% of the amount required for the complete precipitation of the iron in the iron-(II)-salt, additional iron and nitrobenzene being added to the suspension of precipitated nuclei to form the .alpha.-FeOOH particles.

    摘要翻译： 在通过在α-FeO​​OH核的存在下用硝基芳族化合物处理铁以形成α-FeO​​OH颗粒和氨基芳族化合物来生产针状磁性氧化铁颜料，然后使α-FeO​​OH颗粒脱水并还原 包括在金属铁，铁 - （II） - 盐和硝基 - 芳族化合物的悬浮液中在约0至90℃下形成α-FeO​​OH核的改进，通过在约10至95 在铁 - （II） - 铁中完全沉淀铁所需的量的％。 有利地，金属铁包括铸铁，硝基芳族包括硝基苯，氨基 - 芳族包括苯胺，碱性沉淀剂包括氨和基本上反应的碱金属，碱土金属或铵盐中的至少一种，承载核形成 在约10℃至60℃下加入碱性沉淀剂，其中添加铁（II） - 铁中完全沉淀所需的量的约20至80％，添加额外的铁和硝基苯 到析出的核的悬浮液以形成α-FeO​​OH颗粒。

    Process for the production of iron oxide red pigments
    4.
    发明授权
    Process for the production of iron oxide red pigments 失效
    生产氧化铁红颜料的方法

    公开(公告)号：US4234348A

    公开(公告)日：1980-11-18

    申请号：US41466

    申请日：1979-05-22

    申请人： Horst Brunn ,  Heribert Bade ,  Franz Hund

    发明人： Horst Brunn ,  Heribert Bade ,  Franz Hund

    IPC分类号： C01G49/00 ,  C01G49/02 ,  C01G49/06 ,  C09C1/00 ,  C09C1/22 ,  C09C1/24

    CPC分类号： C01G49/02 ,  C09C1/24 ,  C01P2004/10 ,  C01P2004/62 ,  C01P2006/60

    摘要： In the production of an iron oxide red pigment by reducing nitrobenzene with metallic iron in the presence of an acidic iron (II) salt solution, separating off the iron oxide pigment obtained from the reaction medium by washing out, and calcining the pigment at a temperature in the range of about 600.degree. to 1100.degree. C., the improvement which comprises adding an aluminum salt solution over a period of about 5 to 360 minutes at a temperature of about 20.degree. to 100.degree. C. to the iron oxide suspension accumulating during reduction of the nitrobenzene, the suspension containing about 150 to 600 g of iron/l and a residual iron (II) chloride content of about 20 to 160 g/l expressed as iron, the initial pH-value of the iron oxide suspension of about 3 to 5 being adjusted over a period of about 5 to 180 minutes to a final pH-value of about 5.5 to 6.5.

    摘要翻译： 在酸性铁（II）盐溶液的存在下，用金属铁还原硝基苯来制造氧化铁红颜料，通过洗去分离从反应介质获得的氧化铁颜料，并在温度下煅烧颜料 在约600℃至1100℃的范围内，其改进包括在大约20℃至大约100℃的温度下在约5至360分钟的时间内向沉积的氧化铁悬浮液中加入铝盐溶液 还原硝基苯，悬浮液含有约150至600g的铁/ l和残留的氯化铁（II）含量为约20至160g / l，以铁表示，氧化铁悬浮液的初始pH值约为 在约5至180分钟的时间段内调节3至5至约5.5至6.5的最终pH值。