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1.发明授权Preparation of monocalcium phosphate and/or phosphoric acid from phosphate rock 失效从磷酸盐岩中制备磷酸一钙和/或磷酸
公开(公告)号：US4435370A
公开(公告)日：1984-03-06
申请号：US306856
申请日：1981-09-29
CPC分类号： C01B25/30 , C01B25/225 , C01B25/328 , C01F11/22 , C05B7/00
摘要： Monocalcium phosphate, phosphoric acid and/or potassium phosphate, calcium fluoride and gypsum are produced in a process involving acidulation of phosphate rock with phosphoric acid, and wherein monocalcium phosphate dissolved in phosphoric acid is formed during acidulation. In important features, insolubles and impurities are removed and a portion of the monocalcium phosphate may be separated and recovered. Alkali metal ion is added to the solution to form alkali metal fluosilicate, such as K.sub.2 SiF.sub.6, is separated and hydrolyzed with calcium ion to form CaF.sub.2 and the solution is recycled as RH.sub.2 PO.sub.4 /H.sub.3 PO.sub.4 for further reaction with fluorides, where R is alkali metal. A portion of the MCP/H.sub.3 PO.sub.4 solution and/or crystallized monocalcium phosphate can then be reacted with potassium sulfate, potassium bisulfate, or mixtures thereof, to form KH.sub.2 PO.sub.4 or KH.sub.2 PO.sub.4 /H.sub.3 PO.sub.4 solutions, and gypsum or with H.sub.2 SO.sub.4 to produce phosphoric acid. The remaining monocalcium phosphate/phosphoric acid solution can be reacted with sulfuric acid to produce phosphoric acid product and the recycle phosphoric acid required in the phosphate rock acidulation step.
摘要翻译： 磷酸磷酸钙，磷酸和/或磷酸钾，氟化钙和石膏是在磷酸盐酸化磷酸盐岩的过程中生产的，其中在酸化过程中形成溶解在磷酸中的磷酸一钙。 在重要特征中，去除了不溶物和杂质，并且可以分离和回收一部分磷酸一钙。 将碱金属离子加入到溶液中以形成碱金属氟硅酸盐如K 2 SiF 6，用钙离子分离并水解形成CaF 2，并将溶液作为RH 2 PO 4 / H 3 PO 4再循环，以进一步与氟化物反应，其中R为碱金属。 然后可以将一部分MCP / H 3 PO 4溶液和/或结晶的一磷酸钙与硫酸钾，硫酸氢钾或其混合物反应，以形成KH 2 PO 4或KH 2 PO 4 / H 3 PO 4溶液，石膏或与H 2 SO 4反应生成磷酸。 剩余的磷酸一磷酸盐/磷酸溶液可以与硫酸反应生成磷酸产物和磷酸盐酸化步骤中需要的再循环磷酸。
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公开(公告)号：US4479923A
公开(公告)日：1984-10-30
申请号：US511386
申请日：1983-07-06
IPC分类号： C01B25/225 , C01B25/32 , C01B25/16 , C01B15/16 , C01B25/26
CPC分类号： C01B25/225 , C01B25/322
摘要： Phosphate rock, including low grade phosphate ore, is treated to recover phosphoric acid and other valuable products by a series of steps including contacting phosphate ore with a weak phosphoric acid to form a suspension of at least a portion of the slimes contained in the ore so that the slimes can be separated from the ore, and separating the slimes to provide a deslimed phosphate ore. Deslimed phosphate rock is solubilized with phosphoric acid to convert at least a portion of the calcium contained in the rock and form a solution of monocalcium phosphate and phosphoric acid. After removal of solids, this solution can be treated with sulfuric acid in a gypsum crystallizer to form gypsum and the phosphoric acid product wherein filterable gypsum crystals are obtained by maintaining a total SO.sub.3 content of 1.5-4 wt. % in a first crystallizer and neutralizing the SO.sub.3 in a second crystallizer. In other aspects of the invention, at least a portion of the phosphoric acid produced may be recycled to convert additional ore and the slime suspension may be treated to recover the weak acid recovered from the suspension. Further, wash water from the gypsum filter may be recycled to the desliming stage, the filtrate from the deslimer may be cycled to the acidulation reactor and monocalcium phosphate may be recovered as a separate product from phosphoric acid and connected to other useful products.
摘要翻译： 包括低品位磷矿石在内的磷酸盐岩通过一系列步骤处理磷酸和其他有价值的产品，包括使磷矿与弱磷酸接触，形成矿石中至少一部分泥浆的悬浮液 泥浆可以与矿石分离，并分离泥浆以提供去矿磷酸盐矿石。 用磷酸溶解去离子磷酸盐岩以转化岩石中所含的钙的至少一部分，形成磷酸一钙和磷酸的溶液。 去除固体后，该溶液可以在石膏结晶器中用硫酸处理以形成石膏和磷酸产物，其中通过保持总SO 3含量为1.5-4wt。获得可过滤的石膏晶体。 在第一结晶器中的％，并在第二结晶器中中和SO 3。 在本发明的其它方面，所生产的磷酸的至少一部分可以再循环以转化另外的矿石，并且可以处理粘泥悬浮液以回收从悬浮液中回收的弱酸。 此外，来自石膏过滤器的洗涤水可以再循环到脱盐阶段，来自去淤泥的滤液可以循环到酸化反应器，并且磷酸一钙可作为与磷酸分离的产物回收并连接到其它有用的产物。
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公开(公告)号：US4393032A
公开(公告)日：1983-07-12
申请号：US338999
申请日：1982-01-12
IPC分类号： C01B25/225 , C01B25/32 , C01B25/16 , C01B15/16 , C01B25/26
CPC分类号： C01B25/322 , C01B25/225
摘要： Phosphate rock, including low grade phosphate ore, is treated to recover phosphoric acid and other valuable products by a series of steps including contacting phosphate ore with a weak phosphoric acid to form a suspension of at least a portion of the slimes contained in the ore so that the slimes can be separated from the ore, and separating the slimes to provide a deslimed phosphate ore. Deslimed phosphate rock is solubilized with phosphoric acid to convert at least a portion of the calcium contained in the rock and form a solution of monocalcium phosphate and phosphoric acid. After removal of solids, this solution can be treated with sulfuric acid in a gypsum crystallizer to form gypsum and the phosphoric acid product wherein filterable gypsum crystals are obtained by maintaining a total SO.sub.3 content of 1.5-4 wt. % in a first crystallizer and neutralizing the SO.sub.3 in a second crystallizer. In other aspects of the invention, at least a portion of the phosphoric acid produced may be recycled to convert additional ore and the slime suspension may be treated to recover the weak acid recovered from the suspension. Further, wash water from the gypsum filter may be recycled to the desliming stage, the filtrate from the deslimer may be cycled to the acidulation reactor and monocalcium phosphate may be recovered as a separate product from phosphoric acid and connected to other useful products.
摘要翻译： 包括低品位磷矿石在内的磷酸盐岩通过一系列步骤处理磷酸和其他有价值的产品，包括使磷矿与弱磷酸接触，形成矿石中至少一部分泥浆的悬浮液 泥浆可以与矿石分离，并分离泥浆以提供去矿磷酸盐矿石。 用磷酸溶解去离子磷酸盐岩以转化岩石中所含的钙的至少一部分，形成磷酸一钙和磷酸的溶液。 去除固体后，该溶液可以在石膏结晶器中用硫酸处理以形成石膏和磷酸产物，其中通过保持总SO 3含量为1.5-4wt。获得可过滤的石膏晶体。 在第一结晶器中的％，并在第二结晶器中中和SO 3。 在本发明的其它方面，所生产的磷酸的至少一部分可以再循环以转化另外的矿石，并且可以处理粘泥悬浮液以回收从悬浮液中回收的弱酸。 此外，来自石膏过滤器的洗涤水可以再循环到脱盐阶段，来自去淤泥的滤液可以循环到酸化反应器，并且磷酸一钙可作为与磷酸分离的产物回收并连接到其它有用的产物。
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公开(公告)号：US4393030A
公开(公告)日：1983-07-12
申请号：US338998
申请日：1982-01-12
摘要： Phosphate is upgraded to remove slimes therefrom by a process which comprises the steps of:(a) contacting the phosphate ore with a phosphoric acid solution having a concentration of about 1 to 20 weight percent in a desliming unit for a sufficient time to form a suspension containing the slimes and the calcium and phosphate components;(b) passing said suspension through a solids separator to separate deslimed phosphate ore from the slime suspension and recovering the deslimed phosphate ore;(c) removing the slime suspension to a separator to separate the slime solids from the filtrate liquids; and(d) recycling the filtrate liquids to the desliming unit to provide at least a portion of the phosphoric acid solution.
摘要翻译： 磷酸盐被提升以通过一种方法从其中除去泥浆，其方法包括以下步骤：（a）在脱泥单元中使磷酸盐矿石与浓度为约1至20重量％的磷酸溶液接触足够的时间以形成悬浮液 含有泥土和钙和磷酸盐成分; （b）使所述悬浮液通过固体分离器，以将沉淀的磷酸盐矿石与粘泥悬浮液分离，并回收脱矿磷酸盐矿石; （c）将粘泥悬浮液除去到分离器以将泥状固体与滤液液体分离; 和（d）将滤液循环到脱浆单元以提供至少一部分磷酸溶液。
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公开(公告)号：US4302255A
公开(公告)日：1981-11-24
申请号：US116863
申请日：1980-01-30
摘要： A novel sulfur-based adduct formed by reacting sulfur with a diene-containing by-product hydrocarbon mixture available from petrochemical operations and/or from coal processing. The adduct is a reaction product of sulfur and each of the dienes contained in the by-product mixture. Also disclosed is a road surface composition containing this adduct as an asphalt extender or as a replacement for asphalt, and there are also disclosed other compositions containing this adduct such as sulfur cements, sulfur concretes, coatings, foams, structural materials and insulators.
摘要翻译： 通过使硫与含石油化学操作和/或来自煤加工的二烯烃副产物烃混合物反应而形成的新的硫基加合物。 加合物是副产物混合物中所含的硫与二烯的反应产物。 还公开了含有作为沥青增量剂的该加合物或作为沥青的替代物的路面组合物，并且还公开了含有该加合物的其它组合物，例如硫磺水泥，硫磺混凝土，涂料，泡沫，结构材料和绝缘体。
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公开(公告)号：US4450069A
公开(公告)日：1984-05-22
申请号：US300450
申请日：1981-09-08
摘要： There is disclosed a method for upgrading of hydrocarbon mixtures, so as to reduce their content of gum precursors such as diolefins and pseudo-diolefins, and provide a resulting product mixture suitable for mild hydrogenation, for use as a motor fuel or as a feed stock to an extraction unit. The process comprises obtaining a hydrocarbon mixture containing about 60-90 wt. % of aromatic components, about 3-40 wt. % of dienes and pseudodienes, and monoolefins, and up to about 6 wt. % of relatively unreactive organic compounds, reacting this mixture with elemental sulfur in the approximate weight ratio of about 5-95 wt. % of the hydrocarbon mixture with about 95-5 wt. % of elemental sulfur, the reaction being carried out at a temperature in the range of 100.degree.-150.degree. C. for about 10 minutes to 24 hours with good mixing, removing the unreacted materials by distillation and separating a sulfur-hydrocarbon reaction product to provide the upgraded hydrocarbon mixture.
摘要翻译： 公开了一种用于升级烃混合物的方法，以便降低它们的胶体前体如二烯烃和假二烯烃的含量，并提供适用于轻度氢化的所得产物混合物，用作马达燃料或作为原料 到提取单元。 该方法包括获得含有约60-90wt。 ％的芳族组分，约3-40wt。 ％的二烯和假二烯，和单烯烃，以及最多约6wt。 ％的相对不反应的有机化合物，使该混合物与元素硫以约5-95wt。 ％的烃混合物具有约95-5wt。 ％的元素硫，反应在100-150℃的温度下进行约10分钟至24小时，混合均匀，通过蒸馏除去未反应的物质，并将硫烃反应产物分离成 提供升级的碳氢化合物混合物。
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公开(公告)号：US4387167A
公开(公告)日：1983-06-07
申请号：US296176
申请日：1981-08-25
摘要： A novel sulfur-based adduct formed by reacting sulfur with a diene-containing by-product hydrocarbon mixture available from petrochemical operations and/or from coal processing. The adduct is a reaction product of sulfur and each of the dienes contained in the by-product mixture. Also disclosed is a road surface composition containing this adduct as an asphalt extender or as a replacement for asphalt, and there are also disclosed other compositions containing this adduct such as sulfur cements, sulfur concretes, coatings, foams, structural materials and insulators.
摘要翻译： 通过使硫与含石油化学操作和/或来自煤加工的二烯烃副产物烃混合物反应而形成的新的硫基加合物。 加合物是副产物混合物中所含的硫与二烯的反应产物。 还公开了含有作为沥青增量剂的该加合物或作为沥青的替代物的路面组合物，并且还公开了含有该加合物的其它组合物，例如硫磺水泥，硫磺混凝土，涂料，泡沫，结构材料和绝缘体。
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