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21.发明授权
公开(公告)号：US5013365A
公开(公告)日：1991-05-07
申请号：US497923
申请日：1990-03-23
IPC分类号： C09C1/24
CPC分类号： C09C1/24 , C01P2006/60
摘要： A process is disclosed for preparing iron oxide black pigments obtained by the nitrobenzene reduction process, wherein the iron oxide black is heated to 400.degree.-800.degree. C. in a slightly oxidizing atmosphere with optional milling. The pigments are useful for coloring plastics, coatings and building materials.
摘要翻译： 公开了用于制备通过硝基苯还原方法获得的氧化铁黑色颜料的方法，其中在稍微氧化的气氛中，氧化铁黑被加热至400-800℃，任选研磨。 颜料可用于着色塑料，涂料和建筑材料。
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22.发明授权Iron oxide black pigment granules, processes for their preparation and their use 失效氧化铁黑色颜料颗粒，其制备方法及其用途
公开(公告)号：US5002609A
公开(公告)日：1991-03-26
申请号：US498970
申请日：1990-03-26
CPC分类号： C09C1/24 , C04B18/02 , C01P2004/61 , C04B2103/54
摘要： A process is disclosed for preparing dispersant-free iron oxide pigment granules by spraying or atomizing an iron oxide black pigment suspension and heating the resulting granules at a temperature of 400.degree.-800.degree. C. The granules are useful for coloring building materials such as concrete.
摘要翻译： 公开了通过喷雾或雾化氧化铁黑色颜料悬浮液并在400-800℃的温度下加热得到的颗粒来制备无分散剂的氧化铁颜料颗粒的方法。该颗粒可用于着色建筑材料如混凝土 。
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公开(公告)号：US4631090A
公开(公告)日：1986-12-23
申请号：US740090
申请日：1985-05-31
申请人： Rolf Naumann , Lutz Leitner , Jakob Rademachers , Gunter Buxbaum
发明人： Rolf Naumann , Lutz Leitner , Jakob Rademachers , Gunter Buxbaum
IPC分类号： B22F9/22 , C09D5/23 , C09D7/12 , C22C38/00 , G11B5/708 , G11B5/712 , G11B5/84 , G11B5/842 , H01F1/06 , C04B14/00 , C01G49/08 , C04B35/26
摘要： A magnetic pigment consisting essentially of iron, having an X-ray crystallite size with the 110 reflex of from 14 to 22 nm, a coercive force from 55 to 88 kA/m and a switching field distribution of the oriented pigment particles of less than 0.55 is produced by precipitating an iron (II)-salt with a super-stoichiometric quantity of an aqueous alkali metal carbonate solution and oxidizing it to produce .alpha.-FeOOH, .gamma.-Fe.sub.2 O.sub.3, Fe.sub.3 O.sub.4 or betholoid iron oxides, subsequently reducing it to the metal, and providing the iron oxides or oxide hydroxides with an inorganic protection from sintering at the latest during reduction.
摘要翻译： 一种主要由铁组成的磁性颜料，具有X射线微晶尺寸，其反射率为14至22nm，矫顽力为55至88kA / m，取向颜料颗粒的切换场分布小于0.55 通过用超化学计量的碱金属碳酸盐水溶液沉淀铁（II） - 盐，并将其氧化以产生α-FeOOH，γ-Fe 2 O 3，Fe 3 O 4或氧化铝铁氧化物，随后将其还原成金属， 并且在还原期间最终提供具有无机保护的氧化铁或氧化物氢氧化物以免烧结。
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24.发明授权
公开(公告)号：US4631089A
公开(公告)日：1986-12-23
申请号：US668970
申请日：1984-11-07
CPC分类号： C09C1/24 , C01G49/08 , C01P2004/62 , C01P2006/12 , C01P2006/60 , C01P2006/63 , C01P2006/64 , C01P2006/80
摘要： Highly pure and highly color intensive black anisometric magnetite iron oxide pigment having an FeO content of from 26 to 29% by weight and manganese content of less than 0.1% by weight, said pigment further having a specific BET surface area of from 5 to 15 square meters per gram and being needle shaped particles with an average needle diameter of 0.1 to 0.2 .mu.m and an average needle length of from 0.6 to 0.8 .mu.m are produced by producing .alpha.-FeOOH particles by alkali precipitation of an iron salt solution with a nuclear formation stage oxidation and a pigment growth stage oxidation followed by reduction and passivation.
摘要翻译： FeO含量为26〜29重量％，锰含量小于0.1重量％的高纯度，高色泽的黑色不等厚度的磁铁矿氧化铁颜料，所述颜料的比BET比表面积为5〜15平方 米，每克，平均针径为0.1〜0.2μm，平均针针长度为0.6〜0.8μm的针状粒子，通过用铁盐溶液碱沉淀生成α-FeOOH粒子，产生核 形成阶段氧化和颜料生长阶段氧化，然后还原和钝化。
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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：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：US3983221A
公开(公告)日：1976-09-28
申请号：US563761
申请日：1975-03-31
IPC分类号： C01F7/66
CPC分类号： C01F7/66
摘要： A process for the production of basic aluminum nitrate solutions by reacting metallic aluminum with nitric acid, comprising establishing a body of metallic aluminum, supplying additional aluminum to said body, supplying to said body countercurrent to the supply of the additional aluminum nitric acid of a concentration of about 5 to 30% by weight having basic aluminum nitrate dissolved therein and a pH of about 1 to 4, maintaining said body at a temperature of from about 30.degree.C up to the boiling point of the nitric acid, whereby the aluminum reacts with the nitric acid, and removing solution containing reaction product adjacent the point of supply of the additional aluminum and remote from the point of supply of the nitric acid.
摘要翻译： 一种通过使金属铝与硝酸反应生产碱式硝酸铝溶液的方法，包括建立金属铝体，向所述体内供应额外的铝，向所述体供给与浓度为的另外的硝酸的供应逆流 约5至30重量％，其中溶解有碱式硝酸铝，pH为约1至4，将所述体维持在约30℃至硝酸的沸点，由此铝与 硝酸，除去含有反应产物的溶液，邻近附加铝的供应点，远离硝酸的供给点。
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