公开(公告)号：US20240218483A1

公开(公告)日：2024-07-04

申请号：US18556060

申请日：2022-08-09

Applicant: SUNRESIN NEW MATERIALS CO .LTD

Inventor： Suidang LI ,  Xiaokang KOU ,  Fumin GUO ,  Jia YU ,  Wenjin GAO ,  Lili FAN ,  Kaile CHU ,  Weina BIAN ,  Yao WANG ,  Peng XIANG ,  Qiong LIU

IPC: C22B26/12 ,  C22B3/24 ,  C22B3/42

CPC classification number: C22B26/12 ,  C22B3/24 ,  C22B3/42

Abstract: 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.

公开(公告)号：US20230312859A1

公开(公告)日：2023-10-05

申请号：US18043786

申请日：2021-02-24

Applicant: SUNRESIN NEW MATERIALS CO. LTD.

Inventor： Chaoyang WANG ,  Cheng ZHANG ,  Dan WU ,  Weijie ZHAO ,  Yanjun LI ,  Qiong LIU ,  Xiaokang KOU

IPC: C08J9/28 ,  C08F222/34 ,  C08F2/18

CPC classification number: C08J9/28 ,  C08F222/34 ,  C08F2/18 ,  C08J2201/026 ,  C08J2205/042 ,  C08J2325/12

Abstract: 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.

公开(公告)号：US20230038402A1

公开(公告)日：2023-02-09

申请号：US17790668

申请日：2020-12-16

Applicant: SUNRESIN NEW MATERIALS CO. LTD.

Inventor： Li ZHANG ,  Yanjun LI ,  Qiong LIU ,  Xiaokang KOU

IPC: C02F1/28 ,  B01J20/26 ,  C08F112/36 ,  C08F112/08 ,  C08J3/24 ,  C08J9/28

Abstract: 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.