PROCESSES FOR THE REMOVAL AND RECOVERY OF MINOR ELEMENTS IN WET-PROCESS PHOSPHORIC ACID
    2.
    发明申请
    PROCESSES FOR THE REMOVAL AND RECOVERY OF MINOR ELEMENTS IN WET-PROCESS PHOSPHORIC ACID 有权
    在湿法磷酸中去除和回收少量元素的方法

    公开(公告)号:US20150166343A1

    公开(公告)日:2015-06-18

    申请号:US14416264

    申请日:2013-07-21

    摘要: In alternative embodiments, the invention provides processes and methods for the recovery or the removal of the so-called “Minor Elements” consisting of iron, aluminum and magnesium (expressed as oxides), from wet-process phosphoric acid using a continuous ion exchange approach. In alternative embodiments, use of processes and methods of the invention allows for the reduction of these Minor Elements with minimal phosphate losses and dilution in order to produce a phosphoric acid that is suitable for the production of fertilizer products such as world-class diammonium phosphate (DAP), merchant-grade phosphoric acid, superphosphoric acid, and other phosphoric acid products. Further, use of the invention would allow the use of lower grade phosphate rock or ore, which would greatly expand the potential phosphate rock reserve base for phosphate mining activities, and allow for better overall utilization of resources from a given developed mine site.

    摘要翻译: 在替代实施方案中,本发明提供了使用连续离子交换法从湿法磷酸回收或除去由铁,铝和镁(以氧化物形式)组成的所谓“次要元素”的方法和方法 。 在替代实施方案中,使用本发明的方法和方法允许以最小的磷酸盐损失和稀释来还原这些次要元素,以便产生适合于生产肥料产品的磷酸,例如世界级磷酸氢二铵( DAP),商品级磷酸,超磷酸等磷酸产品。 此外,本发明的使用将允许使用较低等级的磷酸盐岩或矿石,这将大大扩大磷酸盐矿开采活动的潜在磷酸盐储备基础,并允许从给定的开发矿区更好地综合利用资源。

    Method and system of controlling sulfur oxides in flue gas from coal or oil-fired boilers
    6.
    发明授权
    Method and system of controlling sulfur oxides in flue gas from coal or oil-fired boilers 有权
    控制煤或燃油锅炉烟气中硫氧化物的方法和系统

    公开(公告)号:US07785552B2

    公开(公告)日:2010-08-31

    申请号:US11693934

    申请日:2007-03-30

    申请人: Leif A. V. Lindau

    发明人: Leif A. V. Lindau

    IPC分类号: B01D53/50 B01D53/81

    摘要: A method of removing SO3 from a flue gas of a boiler. The method includes the following steps: injecting chloride salts into a stream of the flue gas at a position located downstream of an air pre-heater—the position is selected so that the flue gas has a temperature at the position of substantially between 100° C. and 400° C.; reacting chloride salts with the SO3 to form a sulfate-containing reaction product; and collecting the sulfate-containing reaction product in a particulate collector downstream of the boiler. A purge stream from a wet flue gas desulfurization system may be used as a source of the chloride salts. Additional chlorides may be added to the purge stream as necessary.

    摘要翻译: 一种从锅炉烟道气中去除SO3的方法。 该方法包括以下步骤:在位于空气预热器下游的位置将氯化物盐注入烟气流中 - 选择该位置,使得烟道气体的温度基本在100℃ 和400℃。 使氯化物盐与SO3反应形成含硫酸盐的反应产物; 并在锅炉下游的微粒收集器中收集含硫酸盐的反应产物。 可以使用来自湿式烟道气脱硫系统的吹扫流作为氯化物盐的来源。 必要时可以向吹扫流中加入额外的氯化物。

    Methods for recovering at least one metallic element from ore
    8.
    发明申请
    Methods for recovering at least one metallic element from ore 有权
    从矿石中回收至少一种金属元素的方法

    公开(公告)号:US20040253157A1

    公开(公告)日:2004-12-16

    申请号:US10444930

    申请日:2003-05-23

    IPC分类号: C22B026/10

    摘要: A method for recovering at least one metallic element from ore or other material is described and includes reacting ore or other material with a salt capable of recovering the metallic element from the ore or other material to form a reaction product that includes the metallic element. The method also includes recovering the metallic element from the reaction product. To remove the metallic element from the reaction product, the method can involve crushing the reaction product to form a crushed material and dissolving the crushed material in a solvent to remove the precipitates, thereby leaving a sulfate solution containing the metallic element.

    摘要翻译: 描述了一种从矿石或其他材料中回收至少一种金属元素的方法,包括使矿石或其他材料与能够从矿石或其他材料回收金属元素的盐反应形成包含金属元素的反应产物。 该方法还包括从反应产物中回收金属元素。 为了从反应产物中除去金属元素,该方法可以包括粉碎反应产物以形成破碎的材料,并将破碎的材料溶解在溶剂中以除去沉淀物,从而留下含有金属元素的硫酸盐溶液。

    Process for the production of hydrochloric acid and neutralized sulfates
    9.
    发明授权
    Process for the production of hydrochloric acid and neutralized sulfates 失效
    生产盐酸和中和硫酸盐的方法

    公开(公告)号:US06676917B2

    公开(公告)日:2004-01-13

    申请号:US09788140

    申请日:2001-02-16

    IPC分类号: C01B701

    摘要: A process for the production of hydrochloric acid and neutralized sulfates comprising: reacting sulfuric acid with an alkaline metal chloride in order to obtain a liquor containing hydrochloric acid, an acid alkaline metal sulfate and an excess of sulfuric acid; separating the hydrochloric acid from the liquor containing the hydrochloric acid, the acid alkaline metal sulfate and the excess of sulfuric acid; neutralizing the acid alkaline metal sulfate and the excess sulfuric acid by adding to the remaining liquor after the separation of the hydrochloric acid a neutralizing agent to obtain a neutralized mass; cooling the neutralized mass to crystallize the neutralized alkaline metal sulfate and obtain neutralized alkaline metal sulfate crystals; and separating the neutralized alkaline metal sulfate crystals from the liquor.

    摘要翻译: 一种生产盐酸和中和硫酸盐的方法,包括:使硫酸与碱金属氯化物反应,以获得含有盐酸,酸性碱金属硫酸盐和过量硫酸的液体; 从含有盐酸,酸性碱金属硫酸盐和过量的硫酸的液体中分离盐酸; 在分离盐酸中和剂后向其余液体中和酸碱金属硫酸盐和过量硫酸,得到中和物质; 冷却中和的物质以使中和的碱金属硫酸盐结晶,得到中和的碱金属硫酸盐晶体; 并从该液体中分离中和的碱金属硫酸盐晶体。

    Process for manufacturing potassium nitrate fertilizer and other metal nitrates
    10.
    发明授权
    Process for manufacturing potassium nitrate fertilizer and other metal nitrates 失效
    制造硝酸钾肥及其他金属硝酸盐的工艺

    公开(公告)号:US06475457B2

    公开(公告)日:2002-11-05

    申请号:US10000412

    申请日:2001-11-02

    IPC分类号: C01B2148

    摘要: A process for producing potassium nitrate and other metal nitrates from the chlorides, sulfates, oxides of these metals. The process uses nitrogen dioxide as a true fluidizing medium in shallow beds of the aforementioned solids at moderately elevated temperatures in a continuous counter current process to convert the metal chlorides, sulfates, and oxides, into metal nitrates and effluent gas and water vapor. The process may be carried out in a series of true fluidized beds arranged in a vertical configuration so that the solids flow downward due to the fluidized process and the nitrogen dioxide gas flows counter currently in an upward direction producing pure metal nitrates at the bottom and nitrosyl chloride gas and/or water vapor at the top.

    摘要翻译: 从这些金属的氯化物,硫酸盐,氧化物中生产硝酸钾和其它金属硝酸盐的方法。 该方法在连续逆流过程中,在适度升高的温度下,使用二氧化氮作为上述固体的浅层中的真正流化介质,将金属氯化物,硫酸盐和氧化物转化为金属硝酸盐和废气和水蒸气。 该方法可以在一系列以垂直构造布置的真实流化床中进行,使得由于流化过程和二氧化氮气体向下流动,固体向下流动,向上流动,在底部产生纯金属硝酸盐,亚硝酰基 氯化物气体和/或水蒸气在顶部。