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    • 3. 发明公开
    • 수산화리튬의 제조 방법 및 이를 이용한 탄산리튬의 제조 방법
    • 使用氢氧化锂的方法和使用其制造碳酸氢钠的方法
    • KR1020130113287A
    • 2013-10-15
    • KR1020120035742
    • 2012-04-05
    • 주식회사 포스코재단법인 포항산업과학연구원주식회사 엠플라이
    • 전웅김기영한기천송창호정소라이임창
    • C01D15/02C01D15/08B01J19/24
    • C01D15/08B01J4/002B01J19/18B01J2219/185B01J2219/1946C01D15/02
    • PURPOSE: A manufacturing method of the lithium hydroxide is provided to economically extract lithium with the high collection rate without evaporation and concentration process of the salty water for the long time by using phosphoric acid anion precipitant after extracting a lithium phosphate which has a low solubility from lithium which is dissolved in the salty water. CONSTITUTION: A manufacturing method of a lithium hydroxide comprises the following steps: lithium phosphate aqueous solution which includes the particle of lithium phosphate is prepared; a phosphoric acid anion precipitant is inserted in the lithium phosphate aqueous solution; a refractory phosphate compound is precipitated with the reaction of a cation of the phosphoric acid anion precipitant and an anion of the phosphoric acid of the lithium phosphate. The solubility of the refractory phosphate compound to the water is lower than the lithium phosphate. The cation of the phosphoric acid anion precipitant is calcium, strontium, barium, radium, beryllium, magnesium or a combination thereof. The phosphoric acid anion precipitant is the calcium hydroxide. The refractory phosphate compound is hydroxyapatite. The amount of added phosphoric acid anion precipitant is more than1 equivalent base on the content of the lithium phosphate aqueous solution inside lithium phosphate. [Reference numerals] (AA) Lithium concentration in solution (g/L); (BB) Example; (CC) Comparative example; (DD) Time (hr)
    • 目的:提供氢氧化锂的制造方法,在提取具有低溶解度的磷酸锂之后,通过使用磷酸阴离子沉淀剂,以高收集率经济地提取锂,而不用蒸发和浓缩过程中的咸水长时间 溶解在咸水中的锂。 构成:氢氧化锂的制造方法包括以下步骤:制备包含磷酸锂颗粒的磷酸锂水溶液; 将磷酸阴离子沉淀剂插入磷酸锂水溶液中; 通过磷酸阴离子沉淀剂的阳离子和磷酸锂的磷酸的阴离子的反应使难熔磷酸盐化合物沉淀。 难溶磷酸盐化合物对水的溶解度低于磷酸锂。 磷酸阴离子沉淀剂的阳离子是钙,锶,钡,镭,铍,镁或它们的组合。 磷酸阴离子沉淀剂是氢氧化钙。 耐火磷酸盐化合物是羟基磷灰石。 添加磷酸阴离子沉淀剂的量基于磷酸锂内磷酸锂水溶液的含量大于1当量。 (AA)溶液中的锂浓度(g / L); (BB)示例; (CC)比较例; (DD)时间(小时)
    • 4. 发明公开
    • 고순도 리튬 화합물의 제조 방법 및 이를 이용한 시스템
    • 超纯钛酸盐化合物的制备方法和使用该方法的系统
    • KR1020130081160A
    • 2013-07-16
    • KR1020120002185
    • 2012-01-06
    • 재단법인 포항산업과학연구원주식회사 포스코
    • 전웅김기영한기천이임창박운경장영석정기억송창호김대하
    • C01D15/00H01M10/052B01J19/26
    • C25B1/16C01B25/30C01D15/08C01P2006/80C25B13/02C25B13/08
    • PURPOSE: A method for preparing lithium compounds of high purity and a system using the method are provided to cost effectively prepare lithium compounds of high purity based on low energy by obtaining a lithium phosphate aqueous solution by dissolving lithium carbonate of low purity into a phosphoric acid, and electrolyzing the lithium phosphate aqueous solution. CONSTITUTION: A method for preparing lithium compounds of high purity includes the steps of: obtaining a lithium phosphate aqueous solution by dissolving lithium carbonate of 85% or less purity into a phosphoric acid; and obtaining lithium hydroxide by electrolyzing the lithium phosphate aqueous solution. The purity of the lithium compound is more than or equal to 99.5%. The step of obtaining a lithium phosphate aqueous solution includes the steps of: washing lithium carbonate of 85% or less purity with water; and obtaining a lithium phosphate aqueous solution by dissolving the washed lithium carbonate into a phosphoric acid. The electrolyzing step is performed under the current density of 0.01-0.075A/cm^2 and the electrolysis temperature of 15-25°C. The method further includes a step of forming lithium carbonate by generating a reaction between lithium hydroxide and a carbonation gas or a material containing carbonate. A system for preparing lithium compounds of high purity includes a dissolving unit and an electrolyzing unit.
    • 目的:提供一种高纯度锂化合物的制备方法和使用该方法的体系,通过将低纯度的碳酸锂溶解在磷酸中而获得磷酸锂水溶液,以低能量成本有效地制备高纯度的锂化合物 ,并电解磷酸锂水溶液。 构成:制备高纯度锂化合物的方法包括以下步骤:通过将纯度为85%或更低的碳酸锂溶解在磷酸中来获得磷酸锂水溶液; 并通过电解磷酸锂水溶液获得氢氧化锂。 锂化合物的纯度大于等于99.5%。 获得磷酸锂水溶液的步骤包括以下步骤:用水洗涤纯度为85%或以下的碳酸锂; 并通过将洗涤的碳酸锂溶解在磷酸中而获得磷酸锂水溶液。 电解步骤在电流密度为0.01-0.075A / cm ^ 2,电解温度为15-25℃的条件下进行。 该方法还包括通过在氢氧化锂和碳酸化气体或含有碳酸盐的材料之间产生反应来形成碳酸锂的步骤。 用于制备高纯度锂化合物的系统包括溶解单元和电解单元。
    • 9. 发明授权
    • 염수로부터 염화 칼륨을 추출하는 방법
    • 从乙胺提取氯化钾的方法
    • KR101380405B1
    • 2014-04-10
    • KR1020120151293
    • 2012-12-21
    • 재단법인 포항산업과학연구원주식회사 포스코
    • 전웅김기영한기천정기억송창호박운경정소라장영석
    • C01D3/04C01D3/14C01D3/16
    • C01D3/06C01D3/14C01D3/16
    • The present invention relates to a method of extracting potassium chloride from salt water, which comprises the following steps: separating salt water into a solution containing monovalent ions and a solution containing divalent or more ions using a separation membrane with negative charge on the surface; evaporating the solution containing monovalent ions to obtain precipitates; inserting the precipitates into a solution saturated with sodium chloride and potassium chloride; inserting a surfactant into the solution saturated with sodium chloride and potassium chloride and containing the precipitates for changing the surface of the potassium chloride to have hydrophobicity; and collecting the potassium chloride with the hydrophobic surface using bubbles. [Reference numerals] (AA) Precipitates of salt water; (BB) Floating materials after flotation
    • 本发明涉及一种从盐水中提取氯化钾的方法,包括以下步骤:使用表面带负电荷的分离膜将盐水分离成含有一价离子的溶液和含有二价以上离子的溶液; 蒸发含有一价离子的溶液得到沉淀物; 将沉淀物插入饱和氯化钠和氯化钾的溶液中; 将表面活性剂插入用氯化钠和氯化钾饱和的溶液中,并含有用于改变氯化钾表面的沉淀物以具有疏水性; 并用气泡收集疏水表面的氯化钾。 (附图标记)(AA)盐水的沉淀物; (BB)浮选后的浮动材料