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1.发明公开公开(公告)号：US20240026494A1
公开(公告)日：2024-01-25
申请号：US18255166
申请日：2021-12-09
发明人： Suidang LI , Hudao YAN , Jia YU , Lili FAN , Fumin GUO , Junlin GAO , Weiqiang LYU , Yuyun WEI , Qiong LIU , Xiaokang KOU
摘要： A method for recovering lithium from a lithium precipitation mother liquor, the method using the following cycle steps including adsorption, displacement, desorption and transformation: a. mounting a lithium-sodium separation resin in a resin column, and adding the lithium precipitation mother liquor to the resin column for adsorption, wherein the adsorption rate can reach 90% or more; b. after adsorption, washing the resin with water, displacing the resin with a lithium-salt-containing solution to wash out residual sodium from the resin; c. after displacement, desorbing the resin by means of an acid solution to obtain a solution with a high lithium content and a low sodium content, which solution has passed desorption criteria; and d. after desorption, carrying out reverse transformation on the resin by means of a transformation solution in order to ensure that no bubbles appear and then reduce the adsorption effect during the adsorption process. During the cycle, the lithium in the lithium precipitation mother liquor is separated from the solution with a high lithium-to-sodium ratio to obtain the solution with the high lithium-to-sodium ratio.
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公开(公告)号：US10669233B2
公开(公告)日：2020-06-02
申请号：US16358659
申请日：2019-03-19
发明人： Xiaokang Kou , Risheng Wang , Gang Wang , Qiong Liu , Wanping Ren , Julien Boutet , Yuanbin Yang , Valentin Guidal
IPC分类号： C07C319/28 , C07C323/58 , A61K31/145 , B01J20/285 , B01D15/26 , B01D15/12 , B01D15/42
摘要： The present invention provides a process for purifying methionine. A methionine product having a purity of up to 99% or higher is obtained by separating methionine from a salt by-product through a process comprising adsorption and desorption using a macroporous adsorption resin, where the methionine content in the salt by-product is ≤0.03%. The yield of methionine extracted with the resin is up to 98% or higher. By using the process of the present invention, the existing production process is simplified, the quality of the methionine product is improved, and the production costs for methionine are reduced.
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公开(公告)号：US20230017362A1
公开(公告)日：2023-01-19
申请号：US17792624
申请日：2020-12-16
发明人： Jia YU , Fumin GUO , Suidang LI , Qiong LIU , Xiaokang KOU
IPC分类号： C22B26/12 , C01D15/00 , B01J39/04 , B01J39/18 , B01J47/02 , B01J49/60 , B01J49/53 , C22B3/42
摘要： Disclosed is a new continuous lithium-sodium separation method. A lithium-sodium separation mother solution, a first leacheate, a desorption solution, a second leacheate and a lithium-sodium separation adsorption tail solution respectively pass through a lithium-sodium separation mother solution feeding pipe (2), a first leacheate feeding pipe (3), a desorption solution feeding pipe (4), a second leacheate feeding pipe (5) and an adsorption tail solution top desorption solution feeding pipe (6) that are located above and below a rotary disc of a multi-way change-over valve system (1), respectively enter corresponding resin columns (7) by means of pore channels and channels in the multi-way change-over valve system (1), and then are discharged from an adsorption tail solution discharging pipe (8), a first leacheate discharging pipe (9), a qualified liquid discharging pipe (10), a second leacheate discharging pipe (11) and an adsorption tail solution top desorption solution discharging pipe (12), so as to complete the whole technological process, wherein the resin columns (7) are connected in series or in parallel by means of the channels located in the multi-way change-over valve system (1). The method is simple and easy to operate, the resin utilization rate is improved by 20% or more, the efficiency is improved by 40% or more, and the production cost can be reduced by 30-50%. The production reliability is improved, and all-year continuous operation can be realized.
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公开(公告)号：US10287244B2
公开(公告)日：2019-05-14
申请号：US15740792
申请日：2016-06-28
发明人： Xiaokang Kou , Risheng Wang , Gang Wang , Qiong Liu , Wanping Ren , Julien Boutet , Yuanbin Yang , Valentin Guidal
IPC分类号： C07C319/28 , C07C323/58 , B01D15/12 , B01D15/42 , B01J20/285
摘要： The present invention provides a process for purifying methionine. A methionine product having a purity of up to 99% or higher is obtained by separating methionine from a salt by-product through a process comprising adsorption and desorption using a macroporous adsorption resin, where the methionine content in the salt by-product is ≤0.03%. The yield of methionine extracted with the resin is up to 98% or higher. By using the process of the present invention, the existing production process is simplified, the quality of the methionine product is improved, and the production costs for methionine are reduced.
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公开(公告)号：US20240218483A1
公开(公告)日：2024-07-04
申请号：US18556060
申请日：2022-08-09
发明人： Suidang LI , Xiaokang KOU , Fumin GUO , Jia YU , Wenjin GAO , Lili FAN , Kaile CHU , Weina BIAN , Yao WANG , Peng XIANG , Qiong LIU
摘要： The present application discloses a lithium extraction method for an alkaline solution, in which a lithium adsorption material is used in an alkaline environment. Lithium ions in the alkaline solution are adsorbed, the lithium adsorption material is replaced with an alkaline high-lithium low-impurity solution, and then an acid solution is used for desorption, so that a high-lithium salt solution having higher lithium content can be obtained. Lithium concentration can reach 5 g/L or more, and the high-lithium salt solution can enter a bipolar membrane system for electrolysis, thereby preparing an alkaline high-lithium low-impurity solution and an acid solution for replacement and desorption of the lithium adsorption material. In the method provided by the present application, lithium in an alkaline solution is adsorbed by resin, and the lithium is preliminarily separated from sodium and potassium. Then, the sodium and the potassium are gradually removed from the resin according to the difference of the retention characteristics of the lithium, the sodium and the potassium on the resin, so that the function of lithium purification is achieved, and lithium concentration is ensured.
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公开(公告)号：US20230312859A1
公开(公告)日：2023-10-05
申请号：US18043786
申请日：2021-02-24
发明人： Chaoyang WANG , Cheng ZHANG , Dan WU , Weijie ZHAO , Yanjun LI , Qiong LIU , Xiaokang KOU
IPC分类号： C08J9/28 , C08F222/34 , C08F2/18
CPC分类号： C08J9/28 , C08F222/34 , C08F2/18 , C08J2201/026 , C08J2205/042 , C08J2325/12
摘要： A porous resin used to solid phase synthesis and a preparation method therefor, specifically being a porous resin having functional groups being an amino group or a hydroxyl group and a preparation method therefor. Using an olefin compound containing two cyano groups as a modified monomer, using a high internal phase emulsion as a pore-foaming agent, and performing suspension polymerization to prepare the porous resin. And then functionalizing the porous resin to obtain the porous resin having functional groups being an amino group or a hydroxyl group. Different from the existing preparation method, the modified monomer can make the distribution of the functional groups more uniform, and make the swelling degrees of the porous resin in different solvents close. The high internal phase emulsion pore-foaming agent can make the pore size distribution of the carrier narrower. The porous resin can be used as a solid phase synthesis carrier to prepare an oligonucleotide, and the use of the carrier is beneficial for improving the yield and purity of the oligonucleotide.
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公开(公告)号：US20230038402A1
公开(公告)日：2023-02-09
申请号：US17790668
申请日：2020-12-16
发明人： Li ZHANG , Yanjun LI , Qiong LIU , Xiaokang KOU
IPC分类号： C02F1/28 , B01J20/26 , C08F112/36 , C08F112/08 , C08J3/24 , C08J9/28
摘要： The present invention relates to an adsorbent resin for removing perfluorinated pollutants from a body of water, a preparation therefor and the use thereof. The objective is to solve the problem of traditional adsorbent materials, such as active carbon materials, having a poor effect in terms of removing perfluorooctanoic acid from water, being non-renewable, etc. In the present method, styrene and divinylbenzene are used as framework materials, a suitable pore-forming agent and a suitable dispersant are selected in order to prepare a macroporous resin with a moderate pore size, and an alkylation reaction is carried out at a low hindrance with p-xylylene dichloride (XDC) being used as a post-crosslinking agent, whereby a rigid benzene ring structure is introduced into the resin by means of post-crosslinking, thereby further increasing the hydrophobicity of the resin and increasing the crosslinking degree thereof; in addition, the micropore structure is adjusted in order to obtain an adsorbent resin with a narrow particle size distribution, a uniform pore size and a high specific surface area. The size of micropores in the resin is close to the molecular size of perfluorooctanoates in water, the adsorbate sieving capacity is strong, and the adsorption rate of perfluorinated compounds can be further improved.
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公开(公告)号：US20240183002A1
公开(公告)日：2024-06-06
申请号：US18563129
申请日：2022-08-12
发明人： Suidang LI , Fumin GUO , Wenjin GAO , Pengwei JIAO , Qiong LIU , Jia YU , Weina BIAN , Kaile CHU , Yao WANG , Xiaokang KOU
CPC分类号： C22B3/24 , B01J20/183 , B01J20/28026 , B01J20/3071 , B01J20/3078
摘要： A method for lithium adsorption in a carbonate- and/or sulfate-containing solution, comprising using an aluminum-based lithium adsorbent for adsorption of lithium ions in the carbonate- and/or sulfate-containing solution, after the adsorption is saturated, using a weakly acidic high-concentration salt solution to transform the adsorbent, desorbing the transformed adsorbent by means of a low-concentration salt solution or water, and entering the next cycle for operation.
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公开(公告)号：US20240010774A1
公开(公告)日：2024-01-11
申请号：US18043940
申请日：2021-02-02
发明人： Chaoyang WANG , Cheng ZHANG , Dan WU , Weijie ZHAO , Yanjun LI , Qiong LIU , Xiaokang KOU
IPC分类号： C08F212/12 , C08F212/08 , C08F212/14 , C08F220/44 , C08F220/56 , C08J9/28 , C08J9/36
CPC分类号： C08F212/12 , C08F212/08 , C08F212/18 , C08F220/44 , C08F220/56 , C08J9/286 , C08J9/36 , C08J2201/05 , C08J2325/12 , C08J2205/042
摘要： A solid-phase synthesis carrier, a preparation method therefor and the use thereof, wherein a diene cross-linking agent with a similar reactivity ratio to styrene and two vinyl groups thereof not on the same benzene ring is selected as a cross-linking monomer, and is subjected to suspension polymerization to obtain a porous resin. The porous resin is then functionalized to obtain a porous resin with an amino or hydroxyl functional group. Compared with existing preparation methods, the reactivity ratio of the cross-linking agent and styrene is similar, which is beneficial to improving the uniformity of the chemical structure in the resin, forming uniformly distributed active sites and channels, and is beneficial to improving the reaction efficiency and reducing the mass transfer resistance. The preparation of oligonucleotides by using such a carrier as a solid-phase synthesis carrier can improve the yield and purity of the oligonucleotides.
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10.发明公开公开(公告)号：US20230331591A1
公开(公告)日：2023-10-19
申请号：US18044321
申请日：2021-12-22
发明人： Heng LIU , Wenjin GAO , Suidang LI , Qiong LIU , Xiaokang KOU
IPC分类号： C02F1/42 , C02F1/00 , C08F212/08 , B01J39/20 , B01J39/07 , B01J47/02 , B01J47/14 , B01J49/53 , B01J49/60
CPC分类号： C02F1/42 , C02F1/008 , C08F212/08 , B01J39/20 , B01J39/07 , B01J47/02 , B01J47/14 , B01J49/53 , B01J49/60 , C02F2101/105
摘要： A resin for removing phosphorus from water body, and a preparation method therefor and an application thereof. The particle size of the resin is 0.5-0.8 mm; the resin has a porous structure, the specific surface area is 8-25 m2/g, and the pore size distribution is 3-15 nm, the wet apparent density is 0.68-0.74 g/cm3; the wet true density is 1.12-1.18 g/cm3: and the water content of the resin is 43-57% in percentage by weight. The resin is loaded with a functional group having a lanthanum-oxygen bond, so that the resin can selectively adsorb phosphate radicals in the water body. The resin can selectively remove phosphorus in the water body by using a mode of loading lanthanum on weak acid cation resin and utilizing high selectivity of the lanthanum-oxygen bond to phosphate radicals, is easy to resolve and low in synthesis cost, and can be repeatedly used. Phosphorus in eutrophicated water and waste water can be effectively removed, the content of phosphate radicals in the water body can be controlled within 20 ppm, the phosphorus removal cost of the water body is reduced and the resin has great advantages compared with conventional disposable phosphorus adsorbents.
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