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公开(公告)号：EP3712113A1
公开(公告)日：2020-09-23
申请号：EP19863980.9
申请日：2019-05-16
发明人： DAI, Yihua , CAI, Rongfu , BAN, Wenjun , YANG, Chunhui , WANG, Xingjong , LI, Yunfeng , LI, Yali , ZHENG, Chuanyong , MENG, Qiang , JIANG, Hongjun
IPC分类号： C01D15/08
摘要： The invention discloses a method and a system for preparing battery grade and high purity grade lithium hydroxide and lithium carbonate from high-impurity lithium sources. The method comprises steps for preparation of a refined lithium salt solution, preparation of battery grade lithium hydroxide, preparation of high purity grade lithium hydroxide, preparation of high purity grade lithium carbonate and preparation of battery grade lithium carbonate. The system comprises a refined lithium salt solution preparation subsystem, a battery grade lithium hydroxide preparation subsystem, a high purity grade lithium hydroxide preparation subsystem, a high purity grade lithium carbonate preparation subsystem and a battery grade lithium carbonate preparation subsystem arranged in turn according to production sequence. To treat the high-impurity lithium sources varying in lithium contents, impurity categories and impurity contents, the invention proposes differentiated combinations of physical and chemical treatment methods to adapt to quality variations of the high-impurity lithium sources and meet quality requirements for production of the battery grade and high purity grade lithium hydroxide and lithium carbonate products. Compared with the existing production processes and technologies, the method of the invention is widely adaptable, most of by-products are recyclable, and the process is economical and environmentally friendly.
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2.发明公开
公开(公告)号：EP4306667A1
公开(公告)日：2024-01-17
申请号：EP22891861.1
申请日：2022-11-02
发明人： YANG, Jinfeng , MENG, Qiang , BAN, Wenjun , CAI, Rongfu , DAI, Yihua
摘要： The present invention relates to a preparation method for a high-adsorption-capacity granular titanium-based lithium ion sieve adsorbent. The method includes the following steps: step 1, preparing titanium-based lithium ion sieve precursor powder; step 2, preparing high-adsorption-capacity granular titanium-based lithium ion sieve adsorbent: 1) pretreatment of precursor powder; 2) preparing a composite adhesive; 3) doping, blending and homogenizing; 4) molding and granulating; and 5) eluting and replacing. The granular adsorbent prepared according to the present invention has relatively high porosity, shows good suspension property when being used for extracting lithium from salt lake brine or simulated brine, and is high in adsorption-desorption rate and high in lithium extraction activity; the lithium ion selectivity and the elution rate can reach 95% or above; the granular adsorbent is stable in structure, low in solution loss and long in cycle service life; the molding and granulating process of the granular adsorbent is simple and easy to control, and industrialization is easy to realize.
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公开(公告)号：EP4019468A1
公开(公告)日：2022-06-29
申请号：EP22156885.0
申请日：2019-05-16
发明人： DAI, Yihua , CAI, Rongfu , BAN, Wenjun , YANG, Chunhui , WANG, Xinglong , LI, Yunfeng , LI, Yali , ZHENG, Chuanyong , MENG, Qiang , JIANG, Hongjun
IPC分类号： C01D15/08 , C01D1/30 , C01D1/32 , C01D1/38 , C01D15/02 , B01D61/02 , B01D61/44 , B01D61/50 , B01D61/58
摘要： The invention discloses a method and a system for preparing battery grade and high purity grade lithium hydroxide and lithium carbonate from high-impurity lithium sources. The method comprises steps for preparation of a refined lithium salt solution, preparation of battery grade lithium hydroxide, preparation of high purity grade lithium hydroxide, preparation of high purity grade lithium carbonate and preparation of battery grade lithium carbonate. The system comprises a refined lithium salt solution preparation subsystem, a battery grade lithium hydroxide preparation subsystem, a high purity grade lithium hydroxide preparation subsystem, a high purity grade lithium carbonate preparation subsystem and a battery grade lithium carbonate preparation subsystem arranged in turn according to production sequence. To treat the high-impurity lithium sources varying in lithium contents, impurity categories and impurity contents, the invention proposes differentiated combinations of physical and chemical treatment methods to adapt to quality variations of the high-impurity lithium sources and meet quality requirements for production of the battery grade and high purity grade lithium hydroxide and lithium carbonate products. Compared with the existing production processes and technologies, the method of the invention is widely adaptable, most of by-products are recyclable, and the process is economical and environmentally friendly.
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公开(公告)号：EP4349474A8
公开(公告)日：2024-07-10
申请号：EP22936041.7
申请日：2022-11-23
发明人： YANG, Jinfeng , GAO, Feng , CHEN, Haitao , BAN, Wenjun , CAI, Rongfu , DAI, Yihua
摘要： The present invention relates to a preparation method for a functional material for extracting lithium from an aluminum salt. The method includes the following steps: step 1, preparation of an aluminum salt functional material precursor slurry: mixing polyaluminum, a lithium source and water in proportion, adding an additive, performing ultrasonic stirring to obtain a mixed salt solution, adding an alkali liquor or a basic salt solution into the mixed salt solution at a certain flow rate, adjusting the pH value, and then performing constant-temperature stirring reaction to obtain a lithium-intercalated aluminum salt functional precursor slurry; and step 2, preparing a functional material for extracting lithium from an aluminum salt, namely performing solid-liquid separation, washing and drying on the precursor slurry obtained in the step 1 to obtain the functional material for extracting lithium from an aluminum salt. According to the present invention, cheap polyaluminum is adopted as an aluminum source, and the water solubility is good; the functional material for extracting lithium from an aluminum salt is synthesized with alkali in one step, with high reaction rate, short process and low cos. According to the method, the functional material for extracting lithium from an aluminum salt with high specific surface area, high porosity and high lithium adsorption capacity can be prepared by virtue of strengthening of a freeze-drying technology, and the method can be well used for extracting lithium from high-impurity salt lake brine, with high lithium extraction speed, high selectivity, and potential application value.
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5.发明公开
公开(公告)号：EP4342579A1
公开(公告)日：2024-03-27
申请号：EP22941870.2
申请日：2022-11-23
发明人： YANG, Jinfeng , GAO, Feng , DENG, Longfei , BAN, Wenjun , CAI, Rongfu , DAI, Yihua
摘要： The present invention relates to a preparation method for a high-adsorption-capacity granular aluminum salt lithium extraction adsorbent. The method includes the following steps: step 1, preparation of lithium-intercalated aluminum salt precursor slurry: uniformly mixing an aluminum source, a lithium source and water, and then adding alkali liquor to adjust the pH value so as to obtain the wet lithium-intercalated aluminum salt precursor; step 2, integrated granulation: 1) preparing a VC composite adhesive; 2) blending and homogenizing; 3) granulating; and step 3, drying and activating: drying, washing and activating the granulated adsorbent to obtain the granular aluminum salt lithium extraction adsorbent. The environment-friendly aluminum salt lithium extraction adsorbent prepared by the method has the advantages of high porosity, high lithium adsorption capacity, high lithium extraction rate, long cycle service life and the like, is effectively used for lithium extraction of salt lakes with high magnesium-lithium ratio and low lithium grade, including lithium chloride type salt lakes, lithium sulfate type salt lakes and salt lakes combining the two types; and good adsorption activity and selectivity are shown. The preparation method is short in technological process, simple to operate, green and clean, and has good industrial application value.
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公开(公告)号：EP4321246A1
公开(公告)日：2024-02-14
申请号：EP22891858.7
申请日：2022-11-02
发明人： MENG, Qiang , DAI, Yihua , ZHANG, Lei , YANG, Jinfeng , BAN, Wenjun , CAI, Rongfu
摘要： The present invention relates to a preparation method for a titanium-based lithium ion exchanger. The method includes the following steps: step 1, preparation of lithium metatitanate precursor, namely, uniformly mixing titanium source, lithium source and water in proportion by ball milling, adding an adjuvant, and allowing reaction by ultrasonic heating and stirring, so as to obtain the lithium metatitanate precursor powder; step 2, preparation of lithium metatitanate powder, including spray drying and microwave calcination with the lithium metatitanate precursor to obtain the lithium metatitanate powder; and step 3, elution and replacement, namely, leaching out Li with an eluent to obtain lithium ion exchanger. The preparation method is a solid-liquid phase contact reaction, the ratio of raw materials is easy to be accurately controlled. The synthesis reaction is strengthened by ultrasound, so as to accelerate the reaction, and the energy consumption is effectively reduced by microwave calcination. Titanium is controlled at a relatively excessive proportion, so as to prepare the lithium metatitanate powder with high porosity and good filterability. The prepared lithium ion exchanger has good lithium extraction performance and low solution loss of titanium, which satisfy the requirements for practical use.
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公开(公告)号：EP4349474A1
公开(公告)日：2024-04-10
申请号：EP22936041.7
申请日：2022-11-23
发明人： YANG, Jinfeng , GAO, Feng , CHEN, Haitao , BAN, Wenjun , CAI, Rongfu , DAI, Yihua
摘要： The present invention relates to a preparation method for a functional material for extracting lithium from an aluminum salt. The method includes the following steps: step 1, preparation of an aluminum salt functional material precursor slurry: mixing polyaluminum, a lithium source and water in proportion, adding an additive, performing ultrasonic stirring to obtain a mixed salt solution, adding an alkali liquor or a basic salt solution into the mixed salt solution at a certain flow rate, adjusting the pH value, and then performing constant-temperature stirring reaction to obtain a lithium-intercalated aluminum salt functional precursor slurry; and step 2, preparing a functional material for extracting lithium from an aluminum salt, namely performing solid-liquid separation, washing and drying on the precursor slurry obtained in the step 1 to obtain the functional material for extracting lithium from an aluminum salt. According to the present invention, cheap polyaluminum is adopted as an aluminum source, and the water solubility is good; the functional material for extracting lithium from an aluminum salt is synthesized with alkali in one step, with high reaction rate, short process and low cos. According to the method, the functional material for extracting lithium from an aluminum salt with high specific surface area, high porosity and high lithium adsorption capacity can be prepared by virtue of strengthening of a freeze-drying technology, and the method can be well used for extracting lithium from high-impurity salt lake brine, with high lithium extraction speed, high selectivity, and potential application value.
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