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1. 发明授权

US4205046A Reactor for phosphoric acid production 失效
标题翻译：磷酸生产反应器
公开(公告)号：US4205046A
公开(公告)日：1980-05-27
申请号：US940147
申请日：1978-09-06
申请人： Neculai Popovici
发明人： Neculai Popovici
IPC分类号： B01J16/00 , B01J19/18 , C01B25/22 , F01C1/08 , F01C1/00
CPC分类号： B01J16/00 , B01J19/1862 , C01B25/2204 , B01J2219/00114 , B01J2219/00121
摘要： There is disclosed a reactor designed to produce phosphoric acid by wet process. The reaction vessel proper is a cylindrical body divided into two compartments by a sinusoidal wall. The first space formed inside by the cylindrical wall of the vessel and the sinusoidal one and by one curved segment joining them is semi-circular and serves as pre-mixer provided with a stirring device and a pocket to allow the fluid flowing down through the bottom to reach the reaction space overhead. The reaction vat has two compartments and provided with a series of stirring devices so located as to permit an efficient, intimate mixture of the reaction medium. The vat is integrally roofed by a tight cover with many orifices left in it fitted for connection sleeves, such as: supply, gas venting, sight holes, and manholes, etc. The reactor incorporates as an integral unit a space devoted to the pre-mixing of reactants and means to guide the reaction medium through the reaction vessel; in this way the retention time required for the reaction process and calcium sulphate crystallization is decreased.
摘要翻译：公开了一种设计用于通过湿法生产磷酸的反应器。反应容器本体是通过正弦壁分成两个隔室的圆柱体。由容器的圆柱形壁形成的第一空间和连接它们的正弦曲线和一个弯曲段形成的第一空间是半圆形的，并且用作预混合器，其设置有搅拌装置和袋，以使流体向下流过底部达到反应空间的开销。反应槽具有两个隔室并且设置有一系列搅拌装置，以便允许反应介质的有效且紧密的混合。大桶通过紧密的盖子整齐地顶盖，许多孔留在其中，用于连接套管，例如：供气，排气，观察孔和检修孔等。反应器作为一个整体单元组合，混合反应物和引导反应介质通过反应容器的装置; 以这种方式，反应过程和硫酸钙结晶所需的保留时间降低。

2. 发明授权

US4258007A Feed system for phosphoric acid production with decreased foaming 失效
标题翻译：磷酸生产的进料系统，起泡减少
公开(公告)号：US4258007A
公开(公告)日：1981-03-24
申请号：US866988
申请日：1978-01-05
申请人： F. Michael Gragg , Allen S. Adams
发明人： F. Michael Gragg , Allen S. Adams
IPC分类号： B01D19/02 , B01F1/00 , B01F13/02 , C01B25/22 , C01B25/223 , C01B25/226 , B01J19/18 , C01B25/222
CPC分类号： B01F1/00 , B01D19/02 , B01F1/0005 , B01F13/02 , C01B25/2204 , C01B25/223 , C01B25/226 , Y10T137/3003
摘要： A system for the preparation of phosphoric acid from phosphate rock and sulfuric acid, includes in combination a first reaction vessel containing a first slurry comprising calcium sulfate hemihydrate, monocalcium phosphate and phosphoric acid, a second reaction vessel containing a second slurry comprising calcium sulfate hemihydrate, circulation means including a draft tube disposed centrally in each of said vessels and an agitator positioned axially in each of said vessels within said draft tube, a first conduit interconnecting said first and second reaction vessels for conducting said first slurry from said first reaction vessel to said second reaction vessel, a second conduit interconnecting said vessels for conducting said second slurry from said second reaction vessel to said first reaction vessel, an inlet pipe for introducing phosphate rock and phosphoric acid to said first reaction vessel, and wherein a vent is connected to said inlet pipe to permit escape of gases and, thus, increasing the rate of flow of said phosphate rock and phosphoric acid to said first reaction vessel.
摘要翻译：用于从磷酸盐岩和硫酸制备磷酸的系统包括组合含有包含硫酸钙半水合物，磷酸一钙和磷酸的第一浆料的第一反应容器，含有包含硫酸钙半水合物的第二浆料的第二反应容器，循环装置，包括设置在每个所述容器中心的引流管和在所述引流管内的每个所述容器中轴向定位的搅拌器，将所述第一和第二反应容器互连的第一管道，用于将所述第一浆料从所述第一反应容器导入所述第一反应容器，第二反应容器，将所述容器相互连接的第二导管，用于将所述第二浆料从所述第二反应容器引导到所述第一反应容器，用于将磷酸盐岩和磷酸引入所述第一反应容器的入口管，其中，入口管允许气体逸出，因此，使所述磷酸盐岩和磷酸的流量增加到所述第一反应容器。

3. 发明授权

US4220630A Hemihydrate type process for phosphoric acid manufacture using additive to improve filterability 失效
标题翻译：使用添加剂的磷酸制造的半水合物型方法以改善过滤性
公开(公告)号：US4220630A
公开(公告)日：1980-09-02
申请号：US866963
申请日：1978-01-04
申请人： Fernando N. Ore'
发明人： Fernando N. Ore'
IPC分类号： C01B25/22 , C01B25/225 , C01B25/226 , C01F11/46
CPC分类号： C01B25/226 , C01B25/2204 , C01B25/225
摘要： When sulfate ions and a solution of monocalcium phosphate are reacted under conditions which result in the formation of a slurry comprising calcium sulfate hemihydrate and phosphoric acid of about 35% to about 55% P.sub.2 O.sub.5, filtration is improved when a sulfonic acid, a sulfonic acid salt, tall oil fatty acid or alkoxylated or esterified tall oil fatty acid and mixtures thereof is present in the slurry (preferably at 1-1000 ppm). Preferably a two vessel reaction system is used in which the reaction slurry undergoes intra- and inter- vessel circulation (preferably through a draft tube). The solution portion of the slurry in the first vessel (the "dissolver") is preferably maintained at a negative sulfate concentration (i.e. excess Ca.sup.+2) and the solution in the second vessel (the "crystallizer") is preferably maintained at a positive sulfate ion concentration, most preferably at a reduced pressure, (e.g. to provide evaporative cooling). Better filtration rates can thus be obtained due to the lower viscosity of the slurry and/or favorable shape, dominant size and size distribution of the hemihydrate crystals.
摘要翻译：当硫酸根离子和磷酸一氢钙的溶液在导致形成包含约35％至约55％的P 2 O 5的硫酸钙半水合物和磷酸的浆料的条件下反应时，当磺酸，磺酸盐，妥尔油脂肪酸或烷氧基化或酯化妥尔油脂肪酸及其混合物存在于浆料中（优选1-1000ppm）。优选地，使用二容器反应系统，其中反应浆料经受血管内和血管间循环（优选通过引流管）。第一容器（“溶解器”）中的浆液的溶液部分优选维持在负硫酸盐浓度（即过量的Ca + 2），并且第二容器中的溶液（“结晶器”）优选保持在正硫酸根离子浓度，最优选在减压下（例如提供蒸发冷却）。因此，由于浆料的粘度较低和/或有利的形状，半水合物晶体的主要尺寸和尺寸分布，因此可以获得更好的过滤速率。

4. 发明授权

US4188366A Manufacture of phosphoric acid 失效
标题翻译：磷酸的制造
公开(公告)号：US4188366A
公开(公告)日：1980-02-12
申请号：US852613
申请日：1977-11-18
申请人： Samuel V. Houghtaling
发明人： Samuel V. Houghtaling
IPC分类号： B01J19/00 , C01B25/22 , C01F11/46
CPC分类号： B01J19/0013 , C01B25/2204 , B01J2219/00103 , B01J2219/00112 , Y02P20/129
摘要： A multi-compartment reaction system for the manufacture of phosphoric acid by the wet process having a recirculation slurry flash cooler. The removal of heat from the reaction system is accomplished by circulating reaction zone slurry through an elevated vacuum flash cooler under the combined effect of differential liquid levels maintained in the system, and the vacuum in the flash cooler. The amount of reaction zone slurry passed to the flash cooler is sufficiently large so that the temperature differential experienced by the slurry is low and crystallization of calcium sulfate from the slurry liquid occurs in a favorable manner. There is also a substantial reduction in the pumping requirements compared with conventional operations in which the slurry is pumped to an elevated flash cooler, even though the large amount of slurry is passed to the flash cooler in accordance with the invention. In the process of the invention, reaction slurry is withdrawn from a reactor compartment in which the liquid level is substantially higher than in the reactor compartment to which the slurry passes from the flash cooler. This differential in liquid levels and the effect of the vacuum in the flash cooler cause reaction slurry to flow through the flash cooler to remove heat of reaction without the necessity of pumping.
摘要翻译：用于通过湿法制造磷酸的多室反应系统具有再循环浆料闪蒸冷却器。通过在系统中保持的不同液位和闪光冷却器中的真空的联合效应使反应区浆液循环通过升高的真空闪蒸冷却器来实现从反应系统中除去热量。通过闪蒸冷却器的反应区浆料的量足够大，使得浆料所经历的温差很低，并且浆料液中硫酸钙的结晶以有利的方式发生。与传统的操作相比，即使将大量的浆料传送到根据本发明的闪蒸冷却器中的浆料被泵送到升高的闪蒸冷却器中，泵送要求也大大降低。在本发明的方法中，将反应浆料从反应器室中取出，其中液面高度高于浆料从闪蒸冷却器通过的反应器室。液体水平的差异以及闪光冷却器中真空的影响使得反应浆料流过闪蒸冷却器以除去反应热而不需要泵送。

5. 发明申请

US20180257938A1 METHOD FOR PRODUCING PHOSPHORIC ACID AND BY-PRODUCING ALPHA-HEMIHYDRATE GYPSUM BY WET-PROCESS 审中-公开
公开(公告)号：US20180257938A1
公开(公告)日：2018-09-13
申请号：US15760851
申请日：2016-08-26
申请人： KINGENTA ECOLOGICAL ENGINEERING GROUP CO., LTD. , KINGENTA NORSTERRA CHEMICAL CO., LTD.
发明人： Zhaoping Hu , Hongkun Chen , Hualong Yao , Yongxiu Liu , Chengzhi Li , Xixing Zhang
IPC分类号： C01B25/229 , C01B25/22 , C01F11/46
CPC分类号： C01B25/2295 , C01B25/2204 , C01F11/46 , C01F11/466
摘要： Provided is a method for producing phosphoric acid and at the same time obtaining alpha-hemihydrate gypsum including: adding a phosphate rock powder and a part of dilute sulfuric acid into an extraction tank, carrying out an extraction reaction on same, separating a clear liquid from the obtained mixed slurry, sending the clear liquid, as a finished product phosphoric acid, into an acid storeroom, and transferring a separated solid, together with the rest mixed slurry, into a crystal transformation tank; and adding sulfuric acid and a crystal transformation agent into the crystal transformation tank, carrying out a crystal transformation reaction for 1.5-7.5 h at 60° C.-130° C., and solid-liquid separating the obtained mixed acid slurry, wherein the solid can be dried into a gypsum powder, or may be not subjected to a drying step and made into gypsum products such as gypsum boards, gypsum building blocks and gypsum members by directly adding water.

6. 发明授权

US09745193B2 Method for removing iron in the manufacture of phosphoric acid 有权
公开(公告)号：US09745193B2
公开(公告)日：2017-08-29
申请号：US15096080
申请日：2016-04-11
申请人： Jacobs Engineering Group Inc.
发明人： Stephen W. Hilakos , Frank S. Hicks
IPC分类号： C01B25/223 , C01B25/232 , C01B25/222 , C01B25/22 , C25B3/04 , C01G49/10 , C01F11/46
CPC分类号： C01B25/232 , C01B25/2204 , C01B25/222 , C01B25/223 , C01F11/46 , C01G49/10 , C25B3/04
摘要： In the manufacture of phosphoric acid from ore, the typical ore comprises minerals containing phosphorus and calcium along with varied amounts of other elements. Certain ores have substantial iron content which needs to be removed in order to produce quality phosphoric acid product. An improved method and associated chemical processing plant are disclosed for removing this iron. The method involves both reducing and adding oxalic acid to wet process phosphoric acid produced using an otherwise conventional manufacturing process. Iron oxalate precipitate is created which can then conveniently be separated therefrom.

7. 发明授权

US4363786A Apparatus for reacting a particulate solid and a liquid 失效
标题翻译：用于使颗粒状固体和液体反应的装置
公开(公告)号：US4363786A
公开(公告)日：1982-12-14
申请号：US189426
申请日：1980-09-22
申请人： Allen S. Adams , Michael B. Caesar
发明人： Allen S. Adams , Michael B. Caesar
IPC分类号： B01D19/02 , B01F1/00 , B01F7/00 , B01F13/02 , B01F15/00 , B01J16/00 , B01J19/18 , C01B25/22 , C01B25/223 , C01B25/226 , B01F3/12 , B01J8/10 , B01J19/26
CPC分类号： B01J19/1875 , B01D19/02 , B01F1/0005 , B01F1/0011 , B01F1/0038 , B01F13/0294 , B01J16/00 , C01B25/2204 , C01B25/223 , C01B25/226 , B01F15/00902 , B01F2003/0028 , B01F7/00341
摘要： An apparatus useful for the preparation of phosphoric acid from phosphate rock and a strong acid, comprises a closed vessel, a draft tube, means connected to the inner walls of said vessel amd mounting said draft tube in a vertical position within said vessel, an agitator positioned within said draft tube, a shaft for said agitator mounted axially of said vessel and extending into said draft tube, an inlet conduit to said vessel for introducing a feed slurry (e.g. phosphate rock and strong acid) into said vessel, said inlet conduit preferably having a lower end portion terminating within said draft tube and wherein, said draft tube has an outwardly flared lower skirt portion terminating in the bottom portion of said vessel, and preferably including a vent pipe connected to said inlet conduit to reduce foaming generated by the reaction in said vessel and to prevent blockage of said inlet conduit, and including means for applying air, under pressure, to the bottom of said reactor and/or under the bottom of said lower skirt portion, to prevent settling of undissolved solids.
摘要翻译：用于从磷酸盐岩和强酸制备磷酸的装置包括封闭容器，引流管，连接到所述容器的内壁的装置，所述装置将所述引流管安装在所述容器内的垂直位置，搅拌器定位在所述引流管内，用于所述搅拌器的轴安装在所述容器的轴向并延伸到所述引流管中，所述容器的入口管道用于将进料浆料（例如磷酸盐岩和强酸）引入所述容器中，所述入口导管优选其具有终止于所述引流管内的下端部分，并且其中，所述引流管具有终止于所述容器的底部的向外扩张的下裙部，并且优选地包括连接到所述入口导管的通气管，以减少由反应产生的起泡并且包括用于在压力下将空气施加到所述反应器的底部的装置和/或在所述下裙部的底部下方，以防止未溶解的固体沉降。

8. 发明授权

US4242308A Controllable reaction medium single reactor for phosphoric acid production 失效
标题翻译：磷酸生产的可控反应介质单反应器
公开(公告)号：US4242308A
公开(公告)日：1980-12-30
申请号：US957949
申请日：1978-11-06
申请人： Neculai Popovici , Mihail Dochia , Mihai Dumitrescu , Iosif Spirea , Iacob Samoil
发明人： Neculai Popovici , Mihail Dochia , Mihai Dumitrescu , Iosif Spirea , Iacob Samoil
IPC分类号： B01J16/00 , B01J19/18 , C01B25/22 , B01F7/16 , B01J1/20 , B01J8/10
CPC分类号： C01B25/2204 , B01J16/00 , B01J19/1862 , B01J2219/00114 , B01J2219/00153
摘要： Apparatus for the continuous production of phosphoric acid from phosphate-containing rock and sulfuric acid, consisting of a reaction tank with a cylindrical side wall and a planar horizontal bottom and cover, wherein the improvement comprises a rigid vertical internal S-shaped baffle with one end smoothly merging into the said cylindrical side wall of the reaction tank and the other end freely projecting into the tank so as to permit of free circulation and flow of the reaction mixture from one side of the baffle to the other but dividing the reaction tank into two distinct zones.
摘要翻译：用于从含磷酸盐岩和硫酸连续生产磷酸的装置，其由具有圆柱形侧壁和平面水平底部和盖子的反应罐组成，其中改进包括具有一端的刚性垂直内部S形挡板平稳地融入反应罐的所述圆柱形侧壁，另一端自由地突出到罐中，以允许反应混合物从挡板的一侧自由循环和流动到另一侧，但将反应罐分成两部分不同的区域。

9. 发明授权

US4196172A Hemihydrate type phosphoric acid process 失效
标题翻译：半水合磷酸工艺
公开(公告)号：US4196172A
公开(公告)日：1980-04-01
申请号：US865557
申请日：1977-12-29
申请人： Fernando N. Ore , John D. Ellis , James H. Moore
发明人： Fernando N. Ore , John D. Ellis , James H. Moore
IPC分类号： B01J19/00 , C01B25/22 , C01B25/226 , C01F11/46
CPC分类号： C01B25/2204 , B01J19/002 , C01B25/226 , C01F11/46
摘要： Phosphate rock and sulfuric acid are reacted under conditions which result in the formation of calcium sulfate hemihydrate and phosphoric acid of about 35% to about 55% P.sub.2 O.sub.5. A two vessel reaction system is used in which the reaction slurry undergoes intra- and inter- vessel circulation (preferably through a draft tube). The solution portion of the slurry in the first vessel (the "dissolver") is preferably maintained at a negative sulfate concentration (i.e. excess Ca.sup.+2) and the solution in the second vessel (the "crystallizer") is preferably maintained at a positive sulfate ion concentration. Also preferred is that the second vessel be maintained at a reduced pressure, (e.g. to provide evaporation cooling). Better filtration rates can thus be obtained due to the favorable shape, dominant size and size distribution of the hemihydrate crystals. Most preferred is that a crystal modifier (e.g. a sulfonic acid, a sulfonic acid salt, tall oil fatty acids or alkoxylated or esterified tall oil fatty acids) be present in the crystallizer. Surprisingly, the sulfuric acid used in the process can be less (e.g., 0.5-10%) than the stoichiometric amount to convert the calcium in the feed phosphate rock to calcium sulphate.
摘要翻译：磷酸盐岩和硫酸在导致形成约35％至约55％的P 2 O 5的硫酸钙半水合物和磷酸的条件下反应。使用二反应体系，其中反应浆料经受血管内和血管间循环（优选通过引流管）。第一容器（“溶解器”）中的浆液的溶液部分优选维持在负硫酸盐浓度（即过量的Ca + 2），并且第二容器中的溶液（“结晶器”）优选保持在正硫酸根离子浓度。还优选的是将第二容器保持在减压下（例如提供蒸发冷却）。因此，由于半水合物晶体的形状，主要尺寸和尺寸分布均可获得更好的过滤速率。最优选的是在结晶器中存在结晶改性剂（例如磺酸，磺酸盐，妥尔油脂肪酸或烷氧基化或酯化的妥尔油脂肪酸）。令人惊奇的是，该方法中使用的硫酸可以比用于将进料磷酸盐岩中的钙转化为硫酸钙的化学计算量少（例如0.5-10％）。

10. 发明授权

US3522004A Process and apparatus for producing phosphoric acid from phosphate rock 失效
公开(公告)号：US3522004A
公开(公告)日：1970-07-28
申请号：US3522004D
申请日：1966-04-19
申请人： PULLMAN INC
发明人： LOPKER EDWIN B
IPC分类号： C01B25/222 , C01B25/22 , C01B25/225 , C01F11/46
CPC分类号： C01B25/225 , C01B25/2204 , Y02P20/582

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