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公开(公告)号：US4464352A
公开(公告)日：1984-08-07
申请号：US448489
申请日：1982-12-10
申请人： Horst Autzen , Herbert Motz , Peter Rudolf , Wilhelm Sarnecki , Werner Steck , Guenter Vaeth
发明人： Horst Autzen , Herbert Motz , Peter Rudolf , Wilhelm Sarnecki , Werner Steck , Guenter Vaeth
CPC分类号： C01G49/06 , G11B5/70642 , G11B5/70652 , G11B5/70663 , C01P2004/10 , C01P2006/12 , C01P2006/42
摘要： A process for the manufacture of acicular ferrimagnetic iron oxide by converting acicular iron(III) oxide hydroxide at from 300.degree. to 650.degree. C., by treatment with an organic compound which decomposes in this temperature range in the presence of iron oxide, the iron(III) oxide hydroxide used for the reaction being a lepidocrocite which has been heat-treated at from 300.degree. to 700.degree. C.
摘要翻译： 通过用在氧化铁存在下在该温度范围内分解的有机化合物处理，将300至650℃的针状氧化铁（III）氢氧化物转化成针状亚铁磁性氧化铁的方法， 用于该反应的氧化氢氧化物（III）是在300〜700℃下进行热处理的氯铁矿石。
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公开(公告)号：US4221776A
公开(公告)日：1980-09-09
申请号：US6528
申请日：1979-01-25
申请人： Horst Autzen , Helmut Jakusch , Eberhard Koester , Werner Loeser , Peter Rudolf , Wilhelm Sarnecki , Werner Steck
发明人： Horst Autzen , Helmut Jakusch , Eberhard Koester , Werner Loeser , Peter Rudolf , Wilhelm Sarnecki , Werner Steck
CPC分类号： C01G49/06 , G11B5/70642 , G11B5/70647 , G11B5/70652 , G11B5/70684 , G11B5/70694 , C01P2004/10 , C01P2006/12 , C01P2006/42
摘要： A process for the manufacture of acicular ferrimagnetic iron oxide by reducing heat-treated acicular iron(III) oxide hydroxide with an organic compound which decomposes in the presence of iron oxide at from 450.degree. to 650.degree. C., followed by at least partial oxidation with an oxygen-containing gas at from 200.degree. to 500.degree. C., wherein the iron(III) oxide hydroxide employed is heat-treated at from 450.degree. to 700.degree. C. and has a surface area, measured by the BET method, of from 10 to 23 m.sup.2 /g.
摘要翻译： 一种通过用450℃至650℃在氧化铁存在下分解有机化合物的热处理的针状铁（III）氢氧化物还原热处理的针状铁磁性氧化铁的方法，然后至少部分氧化 与含氧气体在200-500℃下反应，其中使用的氧化铁（III）氢氧化物在450-700℃下进行热处理，并且通过BET法测量的表面积， 为10至23m2 / g。
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公开(公告)号：US4295879A
公开(公告)日：1981-10-20
申请号：US174240
申请日：1980-07-31
摘要： A process for the manufacture of acicular ferromagnetic iron particles by reducing an iron(III) oxide which carries a shape-stabilizing surface coating and has been produced by heating acicular iron(III) oxide hydroxide at 250.degree.-390.degree. C. in an atmosphere containing water vapor at a partial pressure of not less than 30 mbar, with hydrogen at 275.degree.-425.degree. C.
摘要翻译： 通过还原带有形状稳定表面涂层的氧化铁（III）制造针状铁磁性铁颗粒的方法，并通过在大气中在250-390℃加热针状铁（III）氢氧化物而制备 在不低于30毫巴的分压下，在275-425℃的氢气中含有水蒸气。
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公开(公告)号：US4367214A
公开(公告)日：1983-01-04
申请号：US174105
申请日：1980-07-31
CPC分类号： G11B5/70684 , C01G49/02 , C01G49/06 , C01P2004/10 , C01P2006/12 , C01P2006/42
摘要： A process for the manufacture of acicular ferrimagnetic iron oxide by heating iron(III) oxide or iron(III) oxide hydroxide at 220.degree.-460.degree. C. under a water vapor partial pressure of not less than 30 mbar, reducing the resulting product to magnetite by means of hydrogen and/or CO and/or an organic compound which can decompose in the presence of iron oxide, and then oxidizing the magnetite with an oxygen-containing gas to give acicular ferrimagnetic iron oxide of the formula FeO.sub.X, where X is from 1.33 to 1.50.
摘要翻译： 一种制备针状亚铁磁性氧化铁的方法，该方法是在220°-460℃下，在不少于30毫巴的水蒸气分压下加热氧化铁（III）或氧化铁（III）氢氧化物， 通过氢和/或CO和/或可在氧化铁存在下分解的有机化合物的磁铁矿，然后用含氧气体氧化磁铁矿，得到式FeOX的针状亚铁磁性氧化铁，其中X为 从1.33到1.50。
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5.发明授权
公开(公告)号：US4362708A
公开(公告)日：1982-12-07
申请号：US320014
申请日：1981-11-10
申请人： Manfred Ohlinger , Hans Reichert , Guenter Vaeth , Friedrich R. Faulhaber , Horst Autzen , Peter Rudolf , Joachim Werther
发明人： Manfred Ohlinger , Hans Reichert , Guenter Vaeth , Friedrich R. Faulhaber , Horst Autzen , Peter Rudolf , Joachim Werther
CPC分类号： G11B5/70663 , C01G49/06 , C01P2004/10 , C01P2006/12 , C01P2006/42
摘要： A process for the preparation of acicular gamma-iron(III) oxide of high coercive force by reducing acicular iron(III) oxide hydroxide, as it is being passed continuously through a furnace having two or more heating zones at from 190.degree. to 700.degree. C., by means of a gas mixture which is produced by passing a stream of inert gas, heated to above 250.degree. C., through an organic substance also heated to above 250.degree. C. in a vessel, and, on introduction into the furnace, is first brought into contact with the .alpha.-iron(III) oxide formed from the iron(III) oxide hydroxide by elimination of water in the first heating zone of the furnace at from 190.degree. to 250.degree. C., the .alpha.-iron(III) oxide thereby being converted to magnetite which is subsequently oxidized with an oxygen-containing gas at from 150.degree. to 400.degree. C., to give gamma-iron(III) oxide.
摘要翻译： 一种通过还原针状氧化铁（III）氢氧化物制备高矫顽力的针状γ-铁（III）氧化物的方法，因为它连续通过具有两个或多个加热区的炉子在190℃至700℃ 通过将加热至高于250℃的惰性气体流通过容器中也被加热至高于250℃的有机物质，并通过引入到 炉子首先通过在190℃至250℃的炉的第一加热区中消除水而与由氧化铁（III）氧化物形成的α-铁（III）氧化物接触， 氧化铁（III），从而转化为磁铁矿，随后在150-400℃下用含氧气体氧化，得到氧化三氯化铁（III）。
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6.发明授权Preparation of acicular ferromagnetic metal particles consisting essentially of iron 失效制备基本上由铁组成的针状铁磁性金属颗粒
公开(公告)号：US4378240A
公开(公告)日：1983-03-29
申请号：US268108
申请日：1981-05-28
申请人： Hansjoerg Siegle , Hans H. Reich , Horst Autzen , Werner Steck , Werner Loeser , Eckhard Hetzel , Manfred Ohlinger
发明人： Hansjoerg Siegle , Hans H. Reich , Horst Autzen , Werner Steck , Werner Loeser , Eckhard Hetzel , Manfred Ohlinger
摘要： A process for the preparation of acicular ferromagnetic metal particles, consisting essentially of iron, by reducing acicular iron oxides and/or iron oxide hydroxides, which are either pure or are modified with conventional foreign metal ions, by means of a gaseous reducing agent in a fluidized bed furnace in which a stirrer is provided immediately above the fluidizing grid.
摘要翻译： 一种用于制备基本上由铁组成的针状铁磁金属颗粒的方法，通过还原针状铁氧化物和/或氧化铁氢氧化物，它们是纯的或用常规外来金属离子改性的，通过在 流化床炉，其中在流化栅格的正上方设置有搅拌器。
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