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1. 发明公开

US20240051837A1 METHOD FOR THE PRODUCTION OF LITHIUM HYDROXIDE (LIOH) DIRECTLY FROM LITHIUM CHLORIDE (LICI), WITHOUT THE NEED FOR AN INTERMEDIATE PRODUCTION OF LITHIUM CARBONATE OR SIMILAR 审中-公开
公开(公告)号：US20240051837A1
公开(公告)日：2024-02-15
申请号：US18270791
申请日：2021-01-05
申请人： SOCIEDAD QUIMICA Y MINERA DE CHILE S.A.
发明人： Gabriel MERUANE , Pablo MELIPILLAN
IPC分类号： C01D15/02 , C01D1/30 , C01D1/20 , B01D9/00
CPC分类号： C01D15/02 , C01D1/30 , C01D1/20 , B01D9/004 , B01D2009/0086 , C01P2006/40
摘要： The present invention is directed to a method for the production of lithium hydroxide (LiOH) directly from lithium chloride (LiCl), without the need for an intermediate production of lithium carbonate or similar. Specifically, the invention teaches a method for producing lithium hydroxide directly from lithium chloride, wherein LiCl is converted to LiOH from a brine, the LiOH is then crystallised to obtain crude lithium hydroxide monohydrate (crude LiOH·H2O) and then undergoes a second crystallization to produce pure LiOH·H2O. Finally, it is dried and packaged.

2. 发明授权

US08282690B2 Process for the preparation of solar salt having high purity and whiteness 有权
标题翻译：制备高纯度和白度的太阳能盐的方法
公开(公告)号：US08282690B2
公开(公告)日：2012-10-09
申请号：US11992533
申请日：2005-12-09
申请人： Indrajit Mukhopadhyay , Pushpito Kumar Ghosh , Puthoor Mohandas Vadakke , Abdulhamid Usmanbhai Hamidani , Venkata Rama Krishna Sarma Susarla , Rahul Jasvantrai Sanghavi
发明人： Indrajit Mukhopadhyay , Pushpito Kumar Ghosh , Puthoor Mohandas Vadakke , Abdulhamid Usmanbhai Hamidani , Venkata Rama Krishna Sarma Susarla , Rahul Jasvantrai Sanghavi
IPC分类号： C01D1/30
CPC分类号： C01D3/14 , B01D9/0031 , B01D9/004 , B01D9/005 , C02F1/14 , Y02A20/212 , Y02W10/37
摘要： The process of the invention deals with significant improvements in salt purity and whiteness brought about through treatment of brine with alum prior to charging into crystallizers for solar salt production. The improvements realized are partly on account of elimination of suspended impurities like gypsum and clayey matter in the brine, which may otherwise be carried along with the brine in the crystallizer and finally end up in the salt, and partly due to the improved crystal size and morphology that minimizes embedded impurities in the salt. Rain washing of the heaped salt has resulted in a salt with greatly reduced calcium and sulphate impurity levels hitherto not achieved in solar salt production. Alum treatment by the process of the invention requires no additional time or infrastructure and the cost of the treatment works out to
摘要翻译：本发明的方法通过处理盐水与明矾之间的盐纯度和白度显着提高，然后将其装入用于太阳能盐生产的结晶器中。实现的改进部分是由于在盐水中消除了诸如石膏和粘土质的悬浮杂质，否则这些杂质可能与结晶器中的盐水一起携带，最终最终在盐中，部分是由于改进的晶体尺寸和最小化盐中嵌入杂质的形态。堆积的盐的清洗已经产生了盐，大大降低了太阳能盐生产中迄今未达到的钙和硫酸盐杂质水平。通过本发明的方法进行的公民治疗不需要额外的时间或基础设施，并且处理成本达到每吨盐3美分。该过程可以在任何太阳能盐工程中实施。

3. 发明授权

US6113657A Purification of caustic soda 失效
标题翻译：苛性钠的净化
公开(公告)号：US6113657A
公开(公告)日：2000-09-05
申请号：US41691
申请日：1998-03-13
申请人： Dieter Schlafer , Michael Mauss , Matthias Rauls , Dieter Baumann
发明人： Dieter Schlafer , Michael Mauss , Matthias Rauls , Dieter Baumann
IPC分类号： C01D1/30
CPC分类号： C01D1/30
摘要： In a process for preparing crystalline NaOH.3.5H.sub.2 O, NaOH.3.5H.sub.2 O is allowed to crystallize from an aqueous sodium hydroxide solution which contains sodium chloride and is saturated in respect of NaOH.3.5H.sub.2 O and the crystals formed are separated from the solution using a mechanical solid/liquid separation apparatus, wherein the solid/liquid separation is carried out under conditions under which the crystalline NaOH.3.5H.sub.2 O is freed sufficiently of residual solution adhering to the surface for the sodium chloride content of the crystalline NaOH.3.5H.sub.2 O obtained to be less than 100 mg per kg. The crystalline NaOH.3.5H.sub.2 O is subjected to an additional purification step, which may include the at least superficial melting or the at least superficial dissolution of the crystals, in combination with a solid/liquid separation step. The additional purification step. The additional purification step comprises washing the crystalline NaOH.3.5H.sub.2 O separated off.
摘要翻译：在制备结晶NaOH.3.5H2O的方法中，使NaOH.3.5H2O从含有氯化钠的氢氧化钠水溶液中结晶，并且在NaOH.3.5H 2 O下饱和，并将形成的晶体与溶液分离，使用机械固/液分离装置，其中固/液分离在结晶NaOH.3.5H2O充分释放残留溶液附着在表面上的条件下进行，得到的结晶NaOH.3.5H2O的氯化钠含量为小于100mg / kg。结晶NaOH.3.5H2O经受另外的纯化步骤，其可以包括与固/液分离步骤组合的晶体的至少表面熔融或至少表面溶解。额外的净化步骤。另外的纯化步骤包括洗涤析出的结晶NaOH.3.5H2O。

4. 发明授权

US6026656A Crystallization by evaporation and vapor condensation 失效
标题翻译：通过蒸发和蒸气冷凝结晶
公开(公告)号：US6026656A
公开(公告)日：2000-02-22
申请号：US69155
申请日：1998-04-29
申请人： Bernd Eck , Jorg Heilek
发明人： Bernd Eck , Jorg Heilek
IPC分类号： B01D9/02 , B01D9/00 , C01D1/30 , C07C29/78 , C07C31/20 , C07C51/43 , C07C53/08 , B01D9/04
CPC分类号： B01D9/0018
摘要： In a process for crystallizing material to be isolated, fluid is vaporized from a melt or a solution comprising the material to be isolated and the fluid and the vaporized fluid is condensed or absorbed in a liquid material to form a liquid mixture, wherein the fluid components to be condensed/absorbed have partial pressures over the liquid mixture which are smaller than the partial pressures of these components over the crystallizing solution/melt and the freezing point of the liquid mixture is lower than the condensation/absorption temperature in the liquid mixture.
摘要翻译：在用于使要分离的材料结晶的过程中，流体从熔体或包含待分离材料的溶液蒸发，并且流体和蒸发的流体被冷凝或吸收在液体材料中以形成液体混合物，其中流体组分被冷凝/吸收的液体混合物的分压小于这些组分超过结晶溶液/熔体的分压，并且液体混合物的凝固点低于液体混合物中的冷凝/吸收温度。

5. 发明授权

US3852044A Recovery of substantially potassium-free hydrated magnesium chloride from contaminated aqueous solutions 失效
标题翻译：从污染水溶液中回收大量无钾水合氯化镁
公开(公告)号：US3852044A
公开(公告)日：1974-12-03
申请号：US87630669
申请日：1969-11-13
申请人： GREAT SALT LAKE MINERALS
发明人： NEITZEL U , FLINT H , LUKES J
IPC分类号： C01F5/30 , B01D9/02 , C01D1/30 , C01F5/26
CPC分类号： C01F5/30 , C01P2006/80
摘要： Aqueous solutions containing magnesium chloride as the major dissolved salt but contaminated with sulfate, potassium and sodium to the extent that magnesium chloride produced by evaporating the solution is unacceptably contaminated with potassium, sodium, and sulfate impurities are concentrated to at least near magnesium chloride hexahydrate saturation and are then cooled sufficiently to reduce the potassium concentration to below about 1 mole and the sodium concentration to below about 1 1/2 moles per 1000 moles water. The thus-concentrated solutions are then treated to the extent necessary to reduce the concentration of sulfate to below about 4 moles per 1000 moles water. The remaining brine is evaporated to obtain substantially pure, hydrated magnesium chloride, usually bischofite, containing no more than a few parts per million of potassium impurity. The process is particularly adapted to the production of substantially pure bischofite from brines of the type occuring in the Great Salt Lake of Utah.
摘要翻译：含有氯化镁作为主要溶解盐但被硫酸盐，钾和钠污染的水溶液，使得通过蒸发溶液产生的氯化镁被不可接受地被钾，钠和硫酸盐杂质污染的程度被浓缩至至少接近氯化镁六水合物饱和度然后充分冷却以将钾浓度降低至低于约1摩尔，并将钠浓度降低至低于每1000摩尔水约11/2摩尔。然后将如此浓缩的溶液处理至必需的程度，以将硫酸盐浓度降低至每1000摩尔水低于约4摩尔。将剩余的盐水蒸发以获得基本上纯的，水合的氯化镁，通常是二水合镁，其含有不超过百万分之几的钾杂质。该方法特别适用于从位于犹他州大盐湖的盐水生产基本上纯的双草铁矿。

6. 发明授权

US3728086A Method of preparing ammonium perchlorate crystals of controlled size 失效
标题翻译：制备控制尺寸的高氯酸铵晶体的方法
公开(公告)号：US3728086A
公开(公告)日：1973-04-17
申请号：US3728086D
申请日：1969-04-17
申请人： US NAVY
发明人： ADICOFF A
IPC分类号： C01B11/18 , C01D1/30
CPC分类号： C01B11/185
摘要： A METHOD FOR PREPARING UNIFORM WELL-DEFINED AMMONIUM PERCHLORATE CRYSTALS OF CONTROLLED SIZE WHICH COMPRISES DISSOLVING AMMONIUM PERCHLORATE IN AN ORGANIC SOLVENT AND THEN PRECIPITATING IN A MIXTURE OF AN ORGANIC SOLVENT AND NON-SOLVENT FOR AMMONIUM PERCHLORATE. THE RATIO OF SOLVENT TO NON-SOLVENT IN THE PERECIPITATING SOLUTION DETERMINES THE SIZE OF THE RESULTING CRYSTALS.

7. 发明授权

US3477829A Sodium hydroxide monohydrate crystallization process 失效
标题翻译：氢氧化钠水溶液结晶过程
公开(公告)号：US3477829A
公开(公告)日：1969-11-11
申请号：US3477829D
申请日：1966-02-25
申请人： CHICAGO BRIDGE & IRON CO
发明人： DOCKENDORFF JAY D , CHIRICO ANTHONY N , SANFILIPPO BRUCE P
IPC分类号： C01D1/30
CPC分类号： C01D1/30

8. 发明授权

US3441386A Leaching potassium salts from mixtures in the presence of soluble ferric,chromic and aluminum salts 失效
标题翻译：在可溶性铬，铬和铝的存在下从混合物中浸出的钾盐
公开(公告)号：US3441386A
公开(公告)日：1969-04-29
申请号：US3441386D
申请日：1966-09-29
申请人： MONTEDISON SPA
发明人： VERONICA GIACINTO
IPC分类号： C01D3/16 , C01D1/30
CPC分类号： C01D3/16

9. 发明授权

US2112813A Process of eliminating iron and other impurities from caustic soda 失效
标题翻译：从苛性钠中除去铁和其他杂质的工艺
公开(公告)号：US2112813A
公开(公告)日：1938-03-29
申请号：US71473734
申请日：1934-03-08
申请人： WESTVACO CHLORINE PRODUCTS COR
发明人： DOMINGO LOPEZ
IPC分类号： C01D1/30
CPC分类号： C01D1/30 , Y10S159/34

10. 发明授权

US2040717A Process of purifying concentrated caustic soda solutions 失效
公开(公告)号：US2040717A
公开(公告)日：1936-05-12
申请号：US71178334
申请日：1934-02-17
申请人： PENNSYLVANIA SALT MFG CO
发明人： EARL SWEETLAND , VANDER COOK RAYMON E
IPC分类号： C01D1/30
CPC分类号： C01D1/30

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