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公开(公告)号：US11634337B2
公开(公告)日：2023-04-25
申请号：US16992202
申请日：2020-08-13
摘要： A process for the chemical conversion of contaminated magnesium hydroxide to high purity solutions of magnesium bicarbonate include steps of providing an impure reagent including at least 40% and less than 95% by total weight of total metals of magnesium in a form of solid magnesium hydroxide and at least 10% by weight of total metals of calcium carbonate, combining the impure reagent containing the solid magnesium hydroxide with carbonic acid in water, thereby generating magnesium bicarbonate and water and then filtering out solid calcium carbonate leaving a solution of magnesium bicarbonate in water having a by weight ratio of Mg/(Mg+Ca) in the solution of greater than 95%. Heating and/or drying the magnesium bicarbonate solution produces correspondingly high purity magnesium carbonate.
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公开(公告)号：US09834659B2
公开(公告)日：2017-12-05
申请号：US14779235
申请日：2013-08-12
发明人： Seiji Matsui
CPC分类号： C08K3/22 , C01F5/02 , C01F5/08 , C01F5/14 , C01F5/20 , C01F5/22 , C01P2004/03 , C01P2004/51 , C01P2004/61 , C01P2004/62 , C01P2006/12 , C01P2006/62 , C08K9/04 , C08K2003/222 , C08K2201/003 , C08K2201/006 , C09C1/028
摘要： Provided are magnesium oxide particles which are good in dispersibility in a resin or rubber, can function sufficiently as an acid acceptor or scorch retarder, and do not lower, even after combined with a resin or rubber, material properties thereof; a resin composition; a rubber composition; and a shaped body. The magnesium oxide particles satisfying the following (A) to (C): (A) an average particle size is 5 μm or less; (B) a BET specific surface area is 20 m2/g or more and 200 m2/g or less; and (C) a screen residue by a sieve opening of 45 μm is 0.1% by weight or less.
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公开(公告)号：US20170029284A1
公开(公告)日：2017-02-02
申请号：US15303208
申请日：2015-04-10
发明人： Michael PRIESTNALL
CPC分类号： C01F5/22 , B01D53/62 , B01D53/80 , B01D2251/304 , B01D2251/402 , B01D2251/404 , B01D2251/604 , B01D2257/504 , B01D2258/0283 , B01D2259/126 , C01F5/24 , C01F11/12 , C01F11/18 , C01P2002/72 , C01P2002/88 , Y02C10/04 , Y02P20/152
摘要： A method for activation of magnesium silicate minerals by conversion to magnesium hydroxide for sequestration of carbon dioxide (CO2) is provided. The method includes heating a dry solid-solid mixture of an alkaline earth Silicate-based material with an alkali metal compound at a temperature below 300 C to form a solid product predominantly comprising a mixture of magnesium hydroxide and alkali metal silicate, wherein the Silicate-based material comprises a naturally occurring Olivine, Serpentine mineral and alkali metal silicate. The method includes a subsequent dissolution of the solid product in aqueous solution to form an alkaline aqueous liquid slurry, comprising solid and aqueous phase products and the reaction of the solid phase thus formed with Carbon Dioxide (CO2), producing a metal Carbonate. The method provides a process that has shown significant cost and energy efficiencies for producing magnesium hydroxide and CO2 sequestration via mineral carbonation.
摘要翻译： 提供了一种通过转化为氢氧化镁来螯合二氧化碳（CO2）来活化硅酸镁矿物的方法。 该方法包括在低于300℃的温度下加热碱土金属硅酸盐材料的干固体混合物与碱金属化合物，以形成主要包含氢氧化镁和碱金属硅酸盐的混合物的固体产物，其中硅酸盐 - 基质材料包括天然存在的橄榄石，蛇纹石矿物和碱金属硅酸盐。 该方法包括随后将固体产物溶解在水溶液中以形成碱性水性液体浆料，其包含固相和水相产物以及由此形成的固相与二氧化碳（CO 2）的反应，产生金属碳酸盐。 该方法提供了通过矿物碳酸化生产氢氧化镁和二氧化碳封存显示出显着的成本和能量效率的方法。
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4.发明申请公开(公告)号：US20130040799A1
公开(公告)日：2013-02-14
申请号：US13413259
申请日：2012-03-06
申请人： Marcus Georg Schrems , Anna Katharina Dürr , Günther Huber , Jesus Enrique Zerpa Unda , Katrin Freitag , Michael Karcher , Axel Salden
发明人： Marcus Georg Schrems , Anna Katharina Dürr , Günther Huber , Jesus Enrique Zerpa Unda , Katrin Freitag , Michael Karcher , Axel Salden
CPC分类号： C01F5/22 , C01F5/20 , C01F5/24 , C04B35/04 , C04B35/62675 , C04B2235/3206 , C04B2235/3217 , C04B2235/725 , C04B2235/94
摘要： A process for preparing magnesium compounds by precipitation, in which an aqueous solution or suspension of a magnesium compound is mixed with a precipitant and the corresponding magnesium compound is precipitated wherein the aqueous solution or suspension of a magnesium compound is obtained by reaction of an organomagnesium compound with an aldehyde or a ketone or another electrophile and subsequent aqueous workup of the reaction mixture at a pH of at most 10 or from a magnesium salt with a maximum calcium content and/or potassium content of 200 ppm, based on the magnesium salt used.
摘要翻译： 通过沉淀制备镁化合物的方法，其中将镁化合物的水溶液或悬浮液与沉淀剂混合，并且沉淀出相应的镁化合物，其中镁化合物的水溶液或悬浮液通过有机镁化合物 与醛或酮或另外的亲电子试剂反应，随后在pH最高为10的情况下反应混合物的水处理，或以所使用的镁盐为最高钙含量和/或钾含量为200ppm的镁盐。
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公开(公告)号：US07553462B2
公开(公告)日：2009-06-30
申请号：US11820182
申请日：2007-06-18
申请人： Claus Feldmann , Sascha Ahlert , Jörg-Heino Sachse , Ingo Stahl
发明人： Claus Feldmann , Sascha Ahlert , Jörg-Heino Sachse , Ingo Stahl
CPC分类号： C01F5/14 , B82Y30/00 , C01F5/08 , C01F5/22 , C01P2004/32 , C01P2004/50 , C01P2004/52 , C01P2004/62 , C01P2004/64 , Y10S977/811
摘要： A method for the production of Mg(OH)2 nanoparticles, by means of polyol-mediated synthesis, from an Mg precursor as well as a base. The particles produced with this method have a diameter between 10 nm to 300 nm, have a mono-disperse particle distribution, and are present in non-agglomerated form. They can be converted to MgO particles by means of calcination.
摘要翻译： 一种通过多元醇介导的合成从Mg前体以及碱生产Mg（OH）2纳米颗粒的方法。 用该方法生产的颗粒具有10nm至300nm的直径，具有单分散颗粒分布，并且以非聚集形式存在。 它们可以通过煅烧转化为MgO颗粒。
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公开(公告)号：US20080181844A1
公开(公告)日：2008-07-31
申请号：US11820182
申请日：2007-06-18
申请人： Claus Feldmann , Sascha Ahlert , Jorg-Heino Sachse , Ingo Stahl
发明人： Claus Feldmann , Sascha Ahlert , Jorg-Heino Sachse , Ingo Stahl
CPC分类号： C01F5/14 , B82Y30/00 , C01F5/08 , C01F5/22 , C01P2004/32 , C01P2004/50 , C01P2004/52 , C01P2004/62 , C01P2004/64 , Y10S977/811
摘要： A method for the production of Mg(OH)2 nanoparticles, by means of polyol-mediated synthesis, from an Mg precursor as well as a base. The particles produced with this method have a diameter between 10 nm to 300 nm, have a mono-disperse particle distribution, and are present in non-agglomerated form. They can be converted to MgO particles by means of calcination.
摘要翻译： 通过多元醇介导的合成从Mg前体以及碱生产Mg（OH）2 N 2纳米颗粒的方法。 用该方法生产的颗粒具有10nm至300nm的直径，具有单分散颗粒分布，并且以非聚集形式存在。 它们可以通过煅烧转化为MgO颗粒。
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公开(公告)号：US07179438B2
公开(公告)日：2007-02-20
申请号：US11324620
申请日：2006-01-03
申请人： Dennis K. Jones
发明人： Dennis K. Jones
CPC分类号： B01D53/501
摘要： The present invention provides methods and apparatus for treating flue gas containing sulfur dioxide using a scrubber, and more particularly relates to recovering gypsum and magnesium hydroxide products from the scrubber blowdown. The gypsum and magnesium hydroxide products are created using two separate precipitation reactions. Gypsum is crystallized when magnesium sulfate reacts with calcium chloride. Magnesium hydroxide is precipitated when magnesium chloride from the gypsum crystallization process reacts with calcium hydroxide. The process produces a high quality gypsum with a controllable pH and particle size distribution, as well as high quality magnesium hydroxide.
摘要翻译： 本发明提供了使用洗涤器处理含二氧化硫的烟道气的方法和装置，更具体地说，涉及从洗涤器排污回收石膏和氢氧化镁产物。 使用两个独立的沉淀反应产生石膏和氢氧化镁产物。 当硫酸镁与氯化钙反应时，石膏结晶。 当来自石膏结晶过程的氯化镁与氢氧化钙反应时，氢氧化镁沉淀。 该方法生产具有可控pH和粒度分布的高品质石膏，以及高品质的氢氧化镁。
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8.发明申请公开(公告)号：US20050220697A1
公开(公告)日：2005-10-06
申请号：US10814779
申请日：2004-03-30
申请人： Rajinder Vohra , Pushpito Ghosh , Ashokkumar Kasundra , Himanshu Joshi , Rohit Dave , Maheshkumar Gandhi , Kaushik Langalia , Koushik Halder , Sohan Daga , Ramjibhai Rathod , Hasina Deraiya , Purashottambhai Jadav , Vadakke Mohandas , Abdulhamid Hamidani
发明人： Rajinder Vohra , Pushpito Ghosh , Ashokkumar Kasundra , Himanshu Joshi , Rohit Dave , Maheshkumar Gandhi , Kaushik Langalia , Koushik Halder , Sohan Daga , Ramjibhai Rathod , Hasina Deraiya , Purashottambhai Jadav , Vadakke Mohandas , Abdulhamid Hamidani
CPC分类号： C01D3/14 , C01D3/06 , C01F5/22 , C01F5/30 , C01F11/46 , C01P2006/80 , C22B7/006 , C22B26/10 , Y02P10/234 , Y02P20/125
摘要： The present invention relates to recovery of industrial grade potassium chloride and low sodium edible salt from bittern as part of an integrated process. The process comprises, mixing low sulphate concentrated feed bittern (a by-product of salt industry) of density 31.5 to 32.5° Be (sp.gr. 1.277-1.289) with high density end bittern of density 36.5 to 37.5° Be′ (sp.gr. 1.336-1.35), thereby producing low sodium carnallite, from which industrial grade potassium chloride is produced. The resultant bittern is evaporated in forced evaporation system, thereby producing crude carnallite, from which low sodium salt that would be beneficial to persons suffering from hypertension is produced. When sulphate-rich bittern is used, such bittern is desulphated with CaCl2 that is generated from carnallite decomposed liquor through reaction with lime, and wherein low B2O3-containing Mg(OH)2 is a by-product. The entire content of potassium in feed bittern is recovered in the process of the invention.
摘要翻译： 本发明涉及工业级氯化钾和低钠食用盐的回收，作为一体化工艺的一部分。 该方法包括将密度为31.5至32.5°Be（sp.gr.1.277-1.289）的低浓度硫酸盐浓缩饲料卤水（盐工业的副产物）与密度为36.5至37.5°的高密度末端盐水混合。 ，1.336-1.35），由此生产低钠光卤石，产生工业级氯化钾。 由此产生的卤水在强制蒸发系统中蒸发，从而产生粗制光卤石，由此可产生对高血压患者有益的低钠盐。 当使用富含硫酸盐的卤水时，通过与石灰反应由光卤石分解的液体产生的CaCl 2 2将这种卤水脱硫，并且其中低B 2 O 2 含3％Mg（OH）2的化合物是副产物。 在本发明的方法中回收进料卤水中钾的全部含量。
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公开(公告)号：US6110379A
公开(公告)日：2000-08-29
申请号：US984564
申请日：1997-12-03
CPC分类号： C02F9/00 , C01F11/46 , C01F5/22 , C02F1/461 , C02F1/488 , C02F1/5236 , C02F1/5281 , C02F1/529 , C02F1/66 , C01P2004/61 , C02F1/441 , C02F1/48 , C02F11/02 , C02F2101/101 , C02F2101/20 , C02F2103/023 , C02F2103/10 , C02F2201/46135 , C02F2209/06 , Y10S210/912
摘要： An apparatus and method for removing contaminating metal ions and sulfate ions from acidic aqueous solution such as waste mine water which features passing the solution between pairs of electrodes, each pair of electrodes impressed with a voltage selected according to specific ion species and then adding chemical agents to raise the pH and form precipitates of the metal and sulfate ions. A magnetic field is applied during at least the first mixing step. The precipitate is then separated from the water with settling and filtering steps. The clarified solution is treated by reverse osmosis to concentrate the ammonium.
摘要翻译： 从酸性水溶液如废矿水中去除污染金属离子和硫酸根离子的装置和方法，其特征在于使溶液在电极对之间通过，每对电极印有根据特定离子种类选择的电压，然后加入化学试剂 以提高pH并形成金属和硫酸根离子的析出物。 在至少第一混合步骤期间施加磁场。 然后用沉淀和过滤步骤将沉淀物与水分离。 澄清的溶液通过反渗透处理以浓缩铵。
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公开(公告)号：US5385671A
公开(公告)日：1995-01-31
申请号：US145901
申请日：1993-10-29
CPC分类号： B01D61/145 , B01D61/142 , C01D5/16 , C01F5/22 , C01P2006/22
摘要： A method for the separation of magnesium hydroxide from a mixture of particulate magnesium hydroxide and dissolved sodium sulphate in water and for the washing and thickening of the magnesium hydroxide, includes the steps of pumping the mixture from a holding tank 14 through an ultrafiltration module comprising two banks 16, 18 of tubular membranes to which is applied a back pressure so that the dissolved sodium sulphate passes through the membrane pores positioned substantially at right angles to the direction of flow as a permeate; adding water to the holding tank 14 at a rate substantially equal to the permeate flow rate until the sulphate concentration in the magnesium hydroxide is less than a desired level; and then discontinuing the water addition thus allowing the magnesium hydroxide to thicken until a desired viscosity is reached.
摘要翻译： 从氢氧化镁和溶解的硫酸钠在水中的混合物中分离出氢氧化镁和用于氢氧化镁的洗涤和增稠的方法包括以下步骤：将混合物从储存槽14泵送通过超滤模块 管状膜片18,18向其施加背压，使得溶解的硫酸钠通过基本上与流动方向垂直的膜孔，作为渗透物; 以基本上等于渗透流量的速率向储存槽14中加入水，直到氢氧化镁中的硫酸盐浓度小于期望水平; 然后停止加水，从而使氢氧化镁变稠，直至达到所需的粘度。
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