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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：US4284173A
公开(公告)日：1981-08-18
申请号：US93750
申请日：1979-11-13
申请人： Paul C. Patterson
发明人： Paul C. Patterson
CPC分类号： E04H5/06 , F01M11/04 , F01M11/0458 , Y10T137/3802 , Y10T137/6633
摘要： A motor vehicle lubricating facility for enabling a workman to perform lubricating functions on an automobile rapidly and efficiently with a minimum of waste time and effort. The facility comprises a building structure with a basement floor and a ground floor supported on columns above the basement floor. In the ground floor are a plurality of rectangular longitudinal openings in parallel relation, each adapted to be straddled by an automobile driven over the ground floor through door openings at the front and back of the building structure. Adjustably supported at a selected one of several heights on the columns between the ground and basement floor and substantially coinciding in area with each of the openings in the ground floor, is a "catwalk" or grilled metal platform, on which a workman may stand to perform lubricating functions with respect to parts of the automobile accessible only from beneath the automobile. The I-beams supporting the ground floor at each side of the openings in the ground floor provide tracks on which runs a mobile dolly of the type carrying a power jack as fully disclosed and claimed in my copending application concurrently filed herewith. A mobile tank operating on the same tracks as the dolly, is provided into which oil may be drained directly from the crank case, differential or transmission of an automobile. A metered hose line is provided by which oil or other lubricants supplied therethrough to the work area is automatically measured. A work shelf is suspended from the columns at one side of the catwalk for holding tools and the like used by the workman.
摘要翻译： 一种汽车润滑设备，能够使工人能够以最少的浪费时间和精力快速高效地在汽车上执行润滑功能。 该设施包括一个建筑结构，地下室地板和底层支撑在地下室底部的立柱上。 在底层是平行关系的多个矩形纵向开口，每个矩形纵向开口适合于被建筑物结构的前部和后部的门开口驱动在地面上的汽车。 可调节地支撑在地面和地下室地板之间的立柱上的几个高度中选定的一个高度，并且与底层中的每个开口基本上重合的区域是“走道”或烤金属平台，工人可以在其上站立 执行相对于只能从汽车下方进入的汽车部件的润滑功能。 在底层的开口的每一侧支撑地面的I型梁提供轨道，在其上运行携带电力千斤顶的类型的移动台车，在我们同时提交的共同未决申请中被完全公开和要求保护。 设置在与小车相同的轨道上操作的移动罐，油可以直接从曲轴箱，差速器或变速器排出。 提供了一种定量的软管管线，通过该管线自动测量从其中提供的工作区域的油或其他润滑剂。 工作架从工作台一侧的立柱悬挂，用于保持工人使用的工具等。
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公开(公告)号：US4268492A
公开(公告)日：1981-05-19
申请号：US64182
申请日：1979-08-06
摘要： Alkali metal fluosilicate is used as an intermediate reactant in a process for the production of hydrochloric acid and an alkali metal sulfate from sulfuric acid and an alkali metal chloride. The process includes the reaction of alkali metal fluosilicate with sulfuric acid to produce alkali metal sulfate and H.sub.2 SiF.sub.6, the latter being reacted with alkali metal chloride to produce HCl and alkali metal fluosilicate. The resulting hydrochloric acid may be converted to anhydrous hydrogen chloride. A continuous process for the production of hydrochloric acid and of alkali metal sulfate such as potassium sulfate from an alkali metal fluosilicate material is also disclosed.
摘要翻译： 在从硫酸和碱金属氯化物制备盐酸和碱金属硫酸盐的方法中使用碱金属氟硅酸盐作为中间体反应物。 该方法包括碱金属氟硅酸盐与硫酸反应生成碱金属硫酸盐和H 2 SiF 6，后者与碱金属氯化物反应产生HCl和碱金属氟硅酸盐。 所得盐酸可以转化为无水氯化氢。 还公开了从碱金属氟硅酸盐材料生产盐酸和碱金属硫酸盐如硫酸钾的连续方法。
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公开(公告)号：US3936392A
公开(公告)日：1976-02-03
申请号：US434204
申请日：1974-01-17
CPC分类号： C05B7/00
摘要： Potassium bisulfate is prevented from caking by treatment with finely ground phosphate rock.
摘要翻译： 通过用精细研磨的磷酸盐岩石处理硫酸氢钾防止结块。
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公开(公告)号：USD289376S
公开(公告)日：1987-04-21
申请号：US673428
申请日：1984-11-20
申请人： Frank T. Nemits
设计人： Frank T. Nemits
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7.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：US4328196A
公开(公告)日：1982-05-04
申请号：US190850
申请日：1980-09-25
CPC分类号： C01D5/00 , C01B25/301 , C01B33/186 , C01D9/00 , C01F11/22 , C01P2006/80
摘要： Alkali metal-containing salt products selected from the group consisting of alkali metal dihydrogen phosphate, alkali metal sulfate, alkali metal nitrate, and mixtures thereof, together with alkaline earth metal fluoride, are produced from alkali metal fluosilicate by the steps of:(a) reacting alkali metal fluosilicate with alkaline earth metal ion in an aqueous solution to form alkali metal hydroxide and solid alkaline earth metal fluoride with SiO.sub.2 ;(b) separating the solid alkaline earth metal fluoride and SiO.sub.2 and recovering as useful products;(c) reacting the remaining alkali metal hydroxide solution with a mineral acid selected from the group consisting of phosphoric acid, sulfuric acid, nitric acid, and mixtures thereof, at a temperature in the range of about 30.degree.-100.degree. C. until the reaction is complete; and(d) recovering the alkali metal-containing product.Also provided by this invention is a continuous system for conducting this reaction whereby mother liquors may be recycled and the acid reused in the process, and wherein mineral acid is recovered from which anhydrous HCl can be produced.
摘要翻译： 由碱金属氟硅酸盐由碱金属氟硅酸盐制备选自碱金属磷酸二氢盐，碱金属硫酸盐，碱金属硝酸盐及其混合物的碱金属盐产物，其步骤为：（a） 使碱金属氟硅酸盐与碱土金属离子在水溶液中反应，形成碱金属氢氧化物和固体碱土金属氟化物与SiO2; （b）分离固体碱土金属氟化物和SiO 2并作为有用产物回收; （c）将剩余的碱金属氢氧化物溶液与选自磷酸，硫酸，硝酸及其混合物的无机酸在约30℃-100℃的温度下反应，直到 反应完成 和（d）回收含碱金属的产物。 本发明还提供了一种用于进行该反应的连续系统，由此母液可以再循环并且酸在该方法中重复使用，并且其中回收无机酸可从其中产生无水HCl。
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公开(公告)号：US4303610A
公开(公告)日：1981-12-01
申请号：US150710
申请日：1980-05-19
摘要： A test kit for field analysis of plant tissue magnesium and calcium contains a cork borer for sampling plant tissue, a grinder for particulating the plant tissue sample, and a funnel holder that is capable of being attached to the test kit container. Furthermore, the test kit contains a syringe that is attached to the exit end of a filtration funnel, with the attachment being through the intermediacy of a tube. Attachment of the syringe to the filtration funnel enables vacuum filtration to be carried out in the field.
摘要翻译： 用于植物组织镁和钙的现场分析的测试包含有用于取样植物组织的软木钻孔机，用于使植物组织样品微粒化的研磨机和能够连接到测试试剂盒容器的漏斗保持器。 此外，测试试剂盒包含连接到过滤漏斗的出口端的注射器，附件通过管的中间体。 将注射器连接到过滤漏斗使得能够在现场进行真空过滤。
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公开(公告)号：US4158558A
公开(公告)日：1979-06-19
申请号：US890949
申请日：1978-03-28
CPC分类号： C05B13/06 , H01F41/10 , H01R4/2491 , H01R4/26 , H01R4/4818 , Y10T29/4919 , Y10T29/53239
摘要： A process for the production of a potassium polyphosphate liquid fertilizer in which potassium chloride is reacted with phosphoric acid or polyphosphoric acid in a specific molar ratio, steam, air or other inert gas being blown through the reaction mixture to facilitate removal of hydrochloric acid. The reaction product is dissolved in water or a weak solution, of a liquid ferilizer, the pH adjusted and the resulting solution or slurry is suitable for direct use as a solution fertilizer.
摘要翻译： 一种生产多磷酸钾液体肥料的方法，其中氯化钾与特定摩尔比的磷酸或多磷酸反应，蒸汽，空气或其它惰性气体通过反应混合物吹入以便于除去盐酸。 将反应产物溶解在液体发酵剂的水或弱溶液中，调节pH，所得溶液或浆液适于直接用作溶液肥料。
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