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公开(公告)号：US4378252A
公开(公告)日：1983-03-29
申请号：US268291
申请日：1981-05-29
申请人： Peter Kiemle , Franz Hund , Ingo Pflugmacher , Wolfgang Rambold
发明人： Peter Kiemle , Franz Hund , Ingo Pflugmacher , Wolfgang Rambold
CPC分类号： C01G49/06 , B03C1/00 , C01B13/16 , C09C1/24 , C09C3/04 , C01P2006/60 , C01P2006/62 , C01P2006/65
摘要： A process for increasing the color purity of iron oxide pigment particles admixed with color-modifying impurities and obtained by the Penniman process or the aniline process, comprising introducing the particles into a magnetic field, and removing from the magnetic field two fractions of different magnetizability, the first fraction being iron oxide pigment particles of increased color purity and the second fraction being enriched in impurities.
摘要翻译： 一种用于提高与改色杂质混合并通过Penniman方法或苯胺方法获得的氧化铁颜料颗粒的颜色纯度的方法，包括将颗粒引入磁场，并从磁场中除去两种不同磁化性的部分， 第一部分是增加色纯度的氧化铁颜料颗粒，第二部分富含杂质。
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公开(公告)号：US4400432A
公开(公告)日：1983-08-23
申请号：US305577
申请日：1981-09-24
IPC分类号： G11B5/712 , C01G49/00 , C01G49/02 , C09D5/23 , C09D7/12 , C09D9/04 , G11B5/706 , H01F1/11 , B32B5/16 , B22F1/02 , G11B5/62
CPC分类号： G11B5/70657 , G11B5/70663 , G11B5/70668 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/261 , Y10T428/2991
摘要： In the preparation of highly orientatable needle-shaped ferrimagnetic iron oxide particles by the reduction and reoxidation of needle-shaped particles of hydrated oxide of iron which have been surface treated against sintering the improvement which comprises effecting the surface treatment by applying to the particles of hydrated oxide of iron one layer of oxygen-containing anions and a further layer of polyvalent cations, each layer weighing about 0.02 to 2% by weight of the particle. Advantageously, the polyvalent cation-containing layer is applied between two oxygen-containing anion layers, the oxygen-containing anions used are selected from the group consisting of silicate, phosphate, borate, vanadate, molybdate and tungstate, the polyvalent cations used are selected from the group consisting of aluminum, chromium, manganese, iron and gallium, each layer weighs about 0.1 to 1% of the weight of the particles and before the reduction and reoxidation the surface treated particles of hydrated oxide of iron are tempered at a temperature of about 600.degree. to 900.degree. C.
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公开(公告)号：US4090888A
公开(公告)日：1978-05-23
申请号：US674995
申请日：1976-04-08
CPC分类号： C09C1/24 , C01P2002/52
摘要： In a two-stage process for producing black iron oxide pigments wherein an iron salt solution is alkalized in a first stage to precipitate about 55 to 70% of the iron, the solution is oxidized to convert the precipitate to goethite, the solution is further alkalized in a second stage to precipitate the balance of the iron, the precipitated iron II hydroxide is allowed to react with goethite to form magnetite, the improvement which comprises effecting the second stage in the presence of an inorganic ionic compound of at least one metal selected from the group consisting of copper, nickel, aluminum, chromium, titanium, zirconium and vanadium in about 0.05 to 5% calculated as metal based on the weight of the final pigment. The resulting pigment is of high color intensity, narrow grain distribution range and pronounced magnetite structure.
摘要翻译： 在生产黑铁氧化物颜料的两阶段方法中，其中铁盐溶液在第一阶段碱化以沉淀约55至70％的铁，溶液被氧化以将沉淀物转化成针铁矿，将溶液进一步碱化 在第二阶段中，为了沉淀铁的平衡，使析出的铁II氢氧化物与针铁矿反应形成磁铁矿，其改进包括在选自以下的至少一种金属的无机离子化合物存在下进行第二阶段 约0.05〜5％的铜，镍，铝，铬，钛，锆和钒组成的组以金属计，基于最终颜料的重量计算。 所得颜料具有高颜色强度，窄粒度分布范围和明显的磁铁矿结构。
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4.发明授权Magnetic pigments with improved orientability and a process for their production 失效具有改善定向性的磁性颜料及其生产方法
公开(公告)号：US4014710A
公开(公告)日：1977-03-29
申请号：US489665
申请日：1974-07-18
IPC分类号： C01G49/00 , C01G49/02 , C09C1/00 , C09C1/22 , C09C1/24 , C09C3/12 , C09D5/23 , C09D7/12 , G11B5/706 , H01F1/11
CPC分类号： G11B5/70673 , C01G49/02 , C09C1/24 , G11B5/70657 , G11B5/70663 , G11B5/70668 , C01P2002/50 , C01P2002/82 , C01P2004/10 , C01P2006/42
摘要： An acicular, magnetic iron oxide pigment containing about 0.05 to 5% by weight of an organo silicon compound is produced by treating iron oxide hydroxide seeds either dry or in suspension with an organo silicon compound. Preferred organo silicon compounds comprise polymethylphenylsiloxane, polydimethylsiloxane and polydiphenylsiloxane. Trivalent metal ions may subsequently be deposited. The resulting pigments show only minimal losses of coercive force during processing into magnetic tapes.
摘要翻译： 通过用有机硅化合物处理干燥或悬浮的铁氧化物氢氧化物种子，制造含有约0.05至5重量％的有机硅化合物的针状磁性氧化铁颜料。 优选的有机硅化合物包括聚甲基苯基硅氧烷，聚二甲基硅氧烷和聚二苯基硅氧烷。 随后可以沉积三价金属离子。 所得到的颜料在加工成磁带期间仅表现出最小的矫顽力损失。
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公开(公告)号：US4355006A
公开(公告)日：1982-10-19
申请号：US181551
申请日：1980-08-27
CPC分类号： C22B34/32 , Y02P10/234
摘要： A process for the oxidative dissociation of chrome-containing ores comprising agglomerating a mixture of a chrome-containing ore, an alkaline substance and a moist solid residue from a preceding operation as a leaning agent, dissociating the agglomerate and then leaching to form a solution of chromate and a solid residue, and separating said solution from said solid residue still wet with said solution. Advantageously the alkaline substance comprises sodium hydroxide or sodium carbonate, the still wet residue is added in such a quantity that the agglomerates obtained have a moisture content of between about 10 and 15% by weight, and at least about 70% by weight of the agglomerates have a diameter from about 0.1 to 3 mm.
摘要翻译： 含铬矿石的氧化解离的方法，包括将来自前述操作的含铬矿石，碱性物质和湿固体残余物的混合物作为倾斜剂凝聚，解离附聚物，然后浸出以形成溶液 铬酸盐和固体残余物，并将所述溶液与仍然被所述溶液润湿的所述固体残余物分离。 有利地，碱性物质包括氢氧化钠或碳酸钠，仍然湿的残余物的添加量使得所获得的附聚物具有约10至15重量％的水分含量和至少约70重量％的附聚物 具有约0.1至3mm的直径。
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公开(公告)号：US4323596A
公开(公告)日：1982-04-06
申请号：US21870
申请日：1979-03-19
IPC分类号： G11B5/712 , C01G49/00 , C01G49/02 , C09D5/23 , C09D7/12 , C09D9/04 , G11B5/706 , H01F1/11 , B22F1/02 , G11B5/62
CPC分类号： G11B5/70657 , G11B5/70663 , G11B5/70668 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/261 , Y10T428/2991
摘要： In the preparation of highly orientatable needle-shaped ferrimagnetic iron oxide particles by the reduction and reoxidation of needle-shaped particles of hydrated oxide of iron which have been surface treated against sintering the improvement which comprises effecting the surface treatment by applying to the particles of hydrated oxide of iron one layer of oxygen-containing anions and a further layer of polyvalent cations, each layer weighing about 0.02 to 2% by weight of the particle. Advantageously, the polyvalent cation-containing layer is applied between two oxygen-containing anion layers, the oxygen-containing anions used are selected from the group consisting of silicate, phosphate, borate, vanadate, molybdate and tungstate, the polyvalent cations used are selected from the group consisting of aluminum, chromium, manganese, iron and gallium, each layer weighs about 0.1 to 1% of the weight of the particles and before the reduction and reoxidation the surface treated particles of hydrated oxide of iron are tempered at a temperature of about 600.degree. to 900.degree. C.
摘要翻译： 在通过还原和再氧化已经对烧结进行表面处理的铁的水合氧化物的针状颗粒的还原和再氧化制备高度取向的针状亚铁磁性氧化铁颗粒时，其改进包括通过施加到水合物的颗粒进行表面处理 铁氧化物一层含氧阴离子和另一层多价阳离子，每层重量为颗粒重量的约0.02至2重量％。 有利地，将多价阳离子层施加在两个含氧阴离子层之间，所用的含氧阴离子选自硅酸盐，磷酸盐，硼酸盐，钒酸盐，钼酸盐和钨酸盐，所使用的多价阳离子选自 由铝，铬，锰，铁和镓组成的组，各层重量为颗粒重量的约0.1至1％，在还原和再氧化之前，表面处理的铁水合氧化物颗粒在约 600〜900℃
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公开(公告)号：US4235861A
公开(公告)日：1980-11-25
申请号：US011345
申请日：1979-02-12
摘要： In the production of iron oxide pigments and substantially iron-free sodium sulphate from iron sulphate by passing an oxygen-containing gas through an alkalized iron sulphate-containing solution at a temperature of about 40.degree. to 100.degree. C., and separating iron oxide pigment formed from the solids-free sodium sulphate-containing solution, the improvement of which comprises crystallizing out part of the sodium sulphate from the solids-free solution in a first crystallization step, separating the crystals from the sodium sulphate-containing mother liquor, dividing the mother liquor into first and second portions, dissolving solid iron sulphate hydrate in the first portion, adding to the second portion sodium hydroxide thereby to crystallize additional sodium sulphate, separating the additional crystals of sodium sulphate from the rest of the mother liquor, and using the rest of the mother liquor containing sodium sulphate and sodium hydroxide to alkalize further iron sulphate solution in the precipitation of further iron oxide pigment.
摘要翻译： 在通过含氧气体通过含碱硫酸铁的溶液在约40℃至100℃的温度下生产氧化铁颜料和基本上不含硫的硫酸钠，并分离氧化铁颜料 由不含固体的含硫酸钠溶液形成，其改进包括在第一结晶步骤中从无固体溶液中结晶部分硫酸钠，从含硫酸钠的母液中分离晶体，将 将母液分成第一和第二部分，将固体硫酸铁水合物溶解在第一部分中，向第二部分加入氢氧化钠，从而使另外的硫酸钠结晶，将另外的硫酸钠晶体与其余的母液分离，并使用 剩余的含有硫酸钠和氢氧化钠的母液将另外的硫酸铁溶液碱化 n进一步氧化铁颜料沉淀。
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公开(公告)号：US4140539A
公开(公告)日：1979-02-20
申请号：US817079
申请日：1977-07-18
申请人： Franz Hund , Gunter Buxbaum , Lutz Leitner , Ingo Pflugmacher
发明人： Franz Hund , Gunter Buxbaum , Lutz Leitner , Ingo Pflugmacher
CPC分类号： C09C1/24 , G11B5/70647 , G11B5/70652 , G11B5/70673 , C01P2002/30 , C01P2006/42
摘要： An acicular to prismatic ferrimagnetic iron oxide pigment with a porosity of less than about 10% by volume, and optionally containing up to about 15% by weight of other metal oxides such as Zn or especially Co, are produced by heating a suspension of iron(III)oxide hydroxide in an autoclave to a temperature above about 100.degree. C in the presence of at least one mono-, di- or tri-saccharide, at least one alkali metal or alkaline earth metal hydroxide or carbonate and excess water, and washing, filtering and drying the resulting pigments.
摘要翻译： 通过加热铁的悬浮液（以下）制备孔隙率小于约10体积％的针状至棱柱型亚铁磁性氧化铁颜料，并且任选地含有至多约15重量％的其它金属氧化物如Zn或特别是Co， III）氧化物氢氧化物在高于约100℃的温度下，在至少一种一糖，二糖或三糖，至少一种碱金属或碱土金属氢氧化物或碳酸盐和过量的水的存在下进行，并洗涤 ，过滤并干燥所得颜料。
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