-
公开(公告)号：US4448761A
公开(公告)日：1984-05-15
申请号：US435369
申请日：1982-10-20
申请人： Wilhelm Sarnecki , Jenoe Kovacs , Werner Loeser , Peter Rudolf , Guenter Vaeth
发明人： Wilhelm Sarnecki , Jenoe Kovacs , Werner Loeser , Peter Rudolf , Guenter Vaeth
CPC分类号： G11B5/70694 , C01G49/06 , C01G49/08 , C01P2004/10 , C01P2006/42
摘要： Acicular ferrimagnetic iron oxides are prepared by a process in which iron (III) oxide hydroxide consisting essentially of lepidocrocite is reduced at from 350.degree. to 600.degree. C. by means of an organic compound which is a synthetic polymer with a molecular weight of from 3,000 to 40,000 to give magnetite, which, if desired, is subsequently partially or completely oxidized with an oxygen-containing gas at from 200.degree. to 450.degree. C.
摘要翻译： 针状亚铁磁性氧化铁通过以下方法制备：其中主要由氯铁矿石组成的氧化铁（III）氢氧化物在350至600℃下还原，其中有机化合物是分子量为3,000的合成聚合物 至40,000，以得到磁铁矿，如果需要，其随后在200-450℃下用含氧气体部分或完全氧化。
-
2.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：US4439231A
公开(公告)日：1984-03-27
申请号：US518000
申请日：1983-07-28
申请人： Werner Steck , Peter Rudolf , Wilhelm Sarnecki , Werner Loeser , Jenoe Kovacs , Helmut Jakusch
发明人： Werner Steck , Peter Rudolf , Wilhelm Sarnecki , Werner Loeser , Jenoe Kovacs , Helmut Jakusch
摘要： Acicular ferromagnetic metal particles consisting essentially of iron are prepared by a process wherein acicular iron(III) oxide hydroxide provided with a shape-stabilizing surface coating, or iron(III) oxide obtained therefrom by dehydration, is reduced by means of a decomposable organic compound and hydrogen.
摘要翻译： 基本上由铁组成的针状铁磁金属颗粒是通过一种方法制备的，其中通过脱水从其中获得的具有形状稳定表面涂层或氧化铁（III）的氧化铬针状氧化物（III）通过可分解的有机化合物 和氢气。
-
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。
-
公开(公告)号：US4497723A
公开(公告)日：1985-02-05
申请号：US508168
申请日：1983-06-27
申请人： Manfred Ohlinger , Guenter Vaeth , Peter Rudolf , Wilhelm Sarnecki , Helmut Jakusch , Eberhard Koester , Milena Melzer
发明人： Manfred Ohlinger , Guenter Vaeth , Peter Rudolf , Wilhelm Sarnecki , Helmut Jakusch , Eberhard Koester , Milena Melzer
CPC分类号： B82Y30/00 , C01G49/06 , G11B5/70694 , C01P2002/60 , C01P2004/10 , C01P2004/64 , C01P2006/12 , C01P2006/42
摘要： A process for the preparation of acicular ferrimagnetic iron oxides by reducing gamma-iron(III) oxide hydroxide to magnetite, at from 280.degree. to 620.degree. C., by means of an organic compound which is decomposable at this temperature in the presence of iron oxide, and, optionally, a stream of reducing gas, and, if desired, then oxidizing the magnetite with oxygen-containing gases, at from 150.degree. to 450.degree. C., to acicular ferrimagnetic iron oxide of the formula FeO.sub.x, where x is from above 1.33 to 1.50, wherein the organic compound used for the reduction is a non-polar glycerol ester of a fatty acid which is introduced into the aqueous reaction suspension during the preparation of the gamma-iron(III) oxide hydroxide.
摘要翻译： 一种制备针状亚铁磁性氧化铁的方法，该方法是通过在这种温度下在铁存在下可分解的有机化合物将280℃至620℃的氧化氢氧化物还原成磁铁矿 氧化物和任选的还原气体流，并且如果需要，然后用含氧气体在150℃至450℃下将磁铁矿氧化成式FeO x的针状亚铁磁性氧化铁，其中x为 从1.33到1.50，其中用于还原的有机化合物是在制备γ-铁（III）氧化物氢氧化物期间引入到水性反应悬浮液中的非极性甘油酯脂肪酸酯。
-
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。
-
公开(公告)号：US4344791A
公开(公告)日：1982-08-17
申请号：US174267
申请日：1980-07-31
摘要： A process for the manufacture of acicular ferromagnetic iron particles by heating a goethite, provided with a shape-stabilizing surface coating, at 250.degree.-450.degree. C. in an atmosphere containing water vapor at a partial pressure of not less than 30 mbar, to give alpha-iron(III) oxide, and reducing this material with hydrogen at 275.degree.-425.degree. C., and the use of the iron particles thus obtained as magnetic material in the production of magnetic recording media.
摘要翻译： 一种制备针状铁磁性铁颗粒的方法，该方法是在250°-450℃，在含有不少于30毫巴分压的水蒸汽的气氛中加热具有形状稳定表面涂层的针铁矿，至 得到氧化铁（III），并在275°-425℃下用氢气还原这种材料，并且使用由此获得的铁颗粒作为磁性材料制造磁记录介质。
-
公开(公告)号：US4213959A
公开(公告)日：1980-07-22
申请号：US930513
申请日：1978-08-03
申请人： Rudolf Brodt , Helmut Jakusch , Eberhard Koester , Werner Loeser , Manfred Ohlinger , Wilhelm Sarnecki , Werner Steck
发明人： Rudolf Brodt , Helmut Jakusch , Eberhard Koester , Werner Loeser , Manfred Ohlinger , Wilhelm Sarnecki , Werner Steck
CPC分类号： G11B5/70663 , C01G49/06 , G11B5/62 , G11B5/70647 , G11B5/70652 , C01P2004/10 , C01P2004/54 , C01P2004/61 , C01P2004/62 , C01P2006/42
摘要： A process for the manufacture of acicular ferrimagnetic iron oxide by dehydrating acicular iron(III) oxide hydroxides to give acicular iron(III) oxides, then reducing these iron(III) oxides at from 300.degree. to 650.degree. C. by means of an organic compound which decomposes in this temperature range, and oxidizing the reduced product with an oxygen-containing gas at from 200.degree. to 500.degree. C., wherein the acicular iron(III) oxide hydroxides employed consist of a mixture of goethite and lepidocrocite, containing at least 60% of the latter, and the dehydration is carried out at from 250.degree. to 700.degree. C.
摘要翻译： 通过将针状铁（III）氧化物氢氧化物脱水制成针状亚铁磁性氧化铁，得到针状氧化铁（III），然后通过有机物在300℃至650℃还原这些氧化铁（III） 化合物，其在该温度范围内分解，并在200℃至500℃下用含氧气体氧化还原产物，其中所用的针状（III）氧化物氢氧化物由针铁矿和氯铁矿混合物组成， 最少为60％，脱水为250〜700℃。
-
公开(公告)号：US4259368A
公开(公告)日：1981-03-31
申请号：US138307
申请日：1980-04-08
申请人： Peter Rudolf , Werner Steck , Wilhelm Sarnecki , Christof Jaeckh
发明人： Peter Rudolf , Werner Steck , Wilhelm Sarnecki , Christof Jaeckh
CPC分类号： G11B5/70689 , G11B5/70657
摘要： A process for the manufacture of acicular magnetic iron oxides which consist of a core of gamma-iron(III) oxide and a shell of a magnetite modified with zinc(II) ions and/or manganese(II) ions and which contain, based on the total modified gamma-iron(III) oxide, from 0.1 to 20 percent by weight of iron(II) ions, from 0.1 to 10 percent by weight of zinc(II) ions and/or from 0.1 to 10 percent by weight of manganese(II) ions.
摘要翻译： 一种用于制造针状磁性氧化铁的方法，其由氧化铁（III）的核心和用锌（II）离子和/或锰（II）离子改性的磁铁矿的壳组成，其基于 氧化改性总氧化物，0.1〜20重量％的铁（II）离子，0.1〜10重量％的锌（II）离子和/或0.1〜10重量％的锰 （II）离子。
-
9.发明授权Ferromagnetic metal particles, consisting essentially of iron and carrying a surface coating, and their production 失效铁磁性金属颗粒，主要由铁组成，并带有表面涂层，以及它们的生产
公开(公告)号：US4360377A
公开(公告)日：1982-11-23
申请号：US278663
申请日：1981-06-29
申请人： Werner Steck , Hermann Roller , Wilhelm Sarnecki , Werner Balz
发明人： Werner Steck , Hermann Roller , Wilhelm Sarnecki , Werner Balz
CPC分类号： B22F9/24 , B22F1/02 , H01F1/061 , H01F1/09 , Y10T428/12181
摘要： Ferromagnetic metal particles, consisting essentially of iron and comprising a core, containing not less than 85% by weight of metallic iron, and an iron oxide plus chromium oxide surface layer surrounding this core, which layer additionally contains one or more elements selected from the group comprising zinc, phosphorus in the form of phosphate, aluminum, calcium, strontium, barium, cadmium, lead, cobalt and nickel in a total amount of not more than 9.5% by weight, based on the total amount of the metal particles, and a process for the production of such particles.
摘要翻译： 基本上由铁组成的铁磁性金属颗粒，其包含不少于85重量％的金属铁的芯，以及围绕该芯的氧化铁加上氧化铬表面层，该层另外含有选自以下的一种或多种元素 基于金属颗粒的总量，含有总计不超过9.5重量％的磷酸盐，铝，钙，锶，钡，镉，铅，钴和镍形式的锌，磷， 生产这种颗粒的方法。
-
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。
-
-
-
-
-
-
-
-
-
搜索结果
12 条记录 (耗时 0.02 秒)
