公开(公告)号：US20170355609A1

公开(公告)日：2017-12-14

申请号：US15527050

申请日：2015-11-18

申请人： ALLIANCE MAGNÉSIUM

发明人： Joël FOURNIER ,  Laury GAUTHIER

IPC分类号： C01F5/12 ,  C22B3/44 ,  C22B3/22 ,  C01G53/00 ,  C22B3/10 ,  C22B26/22

CPC分类号： C01F5/12 ,  C01B7/035 ,  C01B17/50 ,  C01B17/74 ,  C01B33/12 ,  C01F5/30 ,  C01F5/40 ,  C01G49/02 ,  C01G53/003 ,  C01G53/04 ,  C22B3/10 ,  C22B3/22 ,  C22B3/44 ,  C22B26/22 ,  C25C3/04 ,  Y02P10/234

摘要： The present description relates to a process for extracting magnesium compounds from magnesium-bearing ores comprising leaching serpentine tailing with dilute HCl to dissolve the magnesium and other elements like iron and nickel. The resudial silica is removed and the rich solution is further neutralized to eliminate impurities and recover nickel. Magnesium chloride is transformed in magnesium sulfate and hydrochloric acid by reaction with sulfuric acid. The magnesium sulfate can be further decomposed in magnesium oxyde and sulphur dioxyde by calcination. The sulphur gas can further be converted into sulfuric acid.

公开(公告)号：US20180111835A1

公开(公告)日：2018-04-26

申请号：US15571290

申请日：2016-05-05

申请人： ALLIANCE MAGNÉSIUM

发明人： Joël FOURNIER ,  Laury GAUTHIER

IPC分类号： C01B33/12 ,  C22B3/10 ,  C22B3/22 ,  C01F5/00

摘要： It is provided a process of producing amorphous silica from a raw material, such as serpentine, containing silica comprising the steps of mixing the raw material with a hydrochloric acid solution; leaching the raw material obtaining a slurry comprising a liquid fraction and a solid fraction containing silica and minerals; separating the liquid fraction and the solid fraction; removing the minerals from the solid fraction by magnetic separation producing a purified solid silica; drying the purified solid silica; and heating the purified solid silica to remove hydroxyl groups from the silica surface and reducing specific surface area of the resulting amorphous silica.

公开(公告)号：US20170368500A1

公开(公告)日：2017-12-28

申请号：US15533785

申请日：2015-12-10

申请人： ALLIANCE MAGNÉSIUM

发明人： Joël FOURNIER ,  Laury GAUTHIER

IPC分类号： B01D53/26 ,  B01D53/68 ,  C22B26/22 ,  C25C3/04 ,  B01D5/00 ,  B01D53/14 ,  C22B3/10

CPC分类号： B01D53/261 ,  B01D5/0015 ,  B01D53/1456 ,  B01D53/26 ,  B01D53/68 ,  B01D2252/103 ,  B01D2256/26 ,  B01D2257/2045 ,  B01D2257/80 ,  C22B3/10 ,  C22B26/22 ,  C25C3/04 ,  C25C7/06

摘要： The present description relates to a process for producing magnesium metal from dihydrate magnesium chloride comprising the steps of dehydrating MgCI2.2H2O with anhydrous hydrochloric acid (HCI) to obtain anhydrous magnesium chloride in an inert environment, releasing the mixture of hydrous HCI and protection gas; and electrolyzing the anhydrous magnesium chloride in an electrolytic cell fed with hydrogen gas under free oxygen atmosphere content, wherein magnesium metal and anhydrous hydrogen chloride are produced, wherein a part of the hydrous HCI is passed through a scrubbing unit to obtain a hydrochloric acid solution, the other part of the hydrochloric chloride gas is dehydrated by contact with a desiccant agent in a drying unit to produce anhydrous HCI, and wherein the anhydrous HCI produced by at least one of the electrolytic cell and the drying unit is reused to dehydrate the of MgCI2.2H2O.

公开(公告)号：US20170159190A1

公开(公告)日：2017-06-08

申请号：US15325843

申请日：2015-07-17

申请人： ALLIANCE MAGNÉSIUM

发明人： Joël FOURNIER ,  Laury GAUTHIER

IPC分类号： C25C1/02 ,  C22B3/00 ,  C21B15/00 ,  C22B3/44 ,  C22B3/22 ,  C22B26/22 ,  C22B3/10

CPC分类号： C25C1/02 ,  C01F5/30 ,  C01F5/32 ,  C01F11/462 ,  C01G53/003 ,  C01G53/04 ,  C21B15/00 ,  C22B3/10 ,  C22B3/22 ,  C22B3/44 ,  C22B23/0423 ,  C22B23/0469 ,  C22B26/22 ,  C25C3/04 ,  C25C7/025 ,  Y02P10/138 ,  Y02P10/234

摘要： The present description relates to a process for producing magnesium metal from magnesium-bearing ores using serpentine. The process described herein consists generally in a mineral preparation and classification followed by leaching with dilute hydrochloric acid. The slurry is filtered and the non-leached portion, containing amorphous silica is recovered. The residual solution is neutralized and purified by chemical precipitation with non activated and activated serpentine. The nickel is also recovered by precipitation at higher pH. A final neutralisation and purification step of magnesium chloride solution by precipitation allows eliminating any traces of residual impurities. The purified magnesium chloride solution is evaporated until saturation and the MgCl2.6H2O is recovered by crystallization in an acid media. The salt is dehydrated and subsequent electrolysis of anhydrous magnesium chloride produces pure magnesium metal and hydrochloric acid.

公开(公告)号：US20150345038A1

公开(公告)日：2015-12-03

申请号：US14438979

申请日：2014-02-14

申请人： ALLIANCE MAGNÉSIUM

发明人： Joël FOURNIER

IPC分类号： C25C7/02 ,  C25C1/02 ,  C25C7/06

CPC分类号： C25C7/02 ,  C25B1/26 ,  C25C1/02 ,  C25C3/04 ,  C25C3/06 ,  C25C7/025 ,  C25C7/06

摘要： The present description relates to an anode arrangement for use in an electrolysis production of metals comprising an anode having a hollow body comprising a cavity, the body having at least one gas outlet connected in flow communication with the cavity. A gas inlet is connected in fluid flow communication with the cavity of the anode, the gas inlet being connectable to a source of hydrogen gas for feeding hydrogen gas into the cavity of the anode. The anode arrangement also comprises an electrical connector and a hydrogen chloride (HCl) recuperator surrounding at least a portion of the anode for recovering HCl gas released through the at least one gas outlet at an outer surface of the anode during electrolysis.

摘要翻译： 本说明书涉及用于电解生产金属的阳极装置，其包括具有中空体的阳极，所述中空体包括空腔，该主体具有与空腔流动连通地连接的至少一个气体出口。 气体入口与阳极的空腔流体连通地连接，气体入口可连接到氢气源，用于将氢气进入阳极的空腔。 阳极布置还包括电连接器和围绕阳极的至少一部分的氯化氢（HCl）换热器，用于回收在电解期间在阳极的外表面处通过至少一个气体出口释放的HCl气体。