-
公开(公告)号：US20200338502A1
公开(公告)日：2020-10-29
申请号：US16954539
申请日：2019-03-19
发明人： Min WANG , Youjing ZHAO , Yan LI , Huaiyou WANG
IPC分类号： B01D61/58 , B01D61/02 , B01D61/04 , B01D61/06 , B01D61/42 , B01D61/14 , C22B26/12 , C22B7/00
摘要： A method for efficient separation and enrichment of lithium includes the following steps: pretreatment: diluting and filtering salina aged brine to obtain pretreated brine; separation: separating the pretreated brine via a nanofiltration separation system to obtain nanofiltration permeate and nanofiltration concentrate, wherein the operation pressure of the nanofiltration separation system is 1.0 MPa˜5.0 MPa; first concentration: carrying out first concentration on the nanofiltration permeate via a reverse osmosis system to obtain reverse osmosis concentrate and reverse osmosis permeate; and second concentration: carrying out second concentration on the reverse osmosis concentrate via an electrodialysis system to obtain electrodialysis concentrate and electrodialysis permeate, wherein the electrodialysis concentrate is a solution enriching lithium ions. The present application couples several different membrane separation technologies and adopts the monovalent ion selective nanofiltration membrane having good separation performance in the process of nanofiltration.
-
公开(公告)号：US20200330925A1
公开(公告)日：2020-10-22
申请号：US16954532
申请日：2019-03-19
发明人： Min WANG , Youjing ZHAO , Yan LI , Huaiyou WANG , Hongjun YANG
摘要： A method for separation and enrichment of lithium includes the following steps: pretreatment: diluting and filtering salina aged brine to obtain pretreated brine; separation: separating the pretreated brine via a nanofiltration separation system to obtain nanofiltration permeate and nanofiltration concentrate; first concentration: carrying out first concentration on the nanofiltration permeate via a reverse osmosis system to obtain reverse osmosis concentrate and reverse osmosis permeate; second concentration: carrying out second concentration on the reverse osmosis concentrate via an electrodialysis system to obtain electrodialysis concentrate and electrodialysis permeate, and the electrodialysis concentrate is solution enriching lithium ions. The present application couples several different membrane separation technologies by utilizing the advantages of different membrane separation technologies, thereby achieving the purposes of improving the separation efficiency of magnesium and lithium and improving the enrichment efficiency of lithium.
-
公开(公告)号：US20200306696A1
公开(公告)日：2020-10-01
申请号：US16954537
申请日：2019-03-19
发明人： Min WANG , Youjing ZHAO , Yan LI , Huaiyou WANG , Hongjun YANG
IPC分类号： B01D61/58 , B01J47/12 , C01D15/00 , B01D61/02 , B01D61/42 , B01D61/14 , B01D61/06 , B01D61/04 , C22B26/12 , C22B3/42
摘要： A method for separation and enrichment of lithium includes the following steps: pretreatment: carrying out at least two dilutions and at least two filtrations on salina aged brine to obtain pretreated brine; separation: separating the pretreated brine via a nanofiltration separation system to obtain nanofiltration permeate and nanofiltration concentrate; first concentration: carrying out first concentration on the nanofiltration permeate via a reverse osmosis system to obtain reverse osmosis concentrate and reverse osmosis permeate; second concentration: carrying out second concentration on the reverse osmosis concentrate via an electrodialysis system to obtain electrodialysis concentrate and electrodialysis permeate, and the electrodialysis concentrate is solution enriching lithium ions. The present application couples several different membrane separation technologies and dilutes the salina aged brine for many times, thereby realizing the purposes of improving separation efficiency of magnesium and lithium and improving the enrichment efficiency of lithium.
-
公开(公告)号：US20230192502A1
公开(公告)日：2023-06-22
申请号：US17997824
申请日：2021-04-30
IPC分类号： C01D3/06
CPC分类号： C01D3/06
摘要： A method for preparing potassium chloride from carnallite includes: carrying out high-temperature water solution mining treatment on carnallite with fresh water to obtain potassium-rich saturated brine; mixing the potassium-rich saturated brine, a sylvine saturated solution, and bittern for mixing brine, evaporation and decomposition to obtain artificial sylvine; and carrying out low-temperature selective dissolution treatment on the artificial sylvine with fresh water to prepare potassium chloride. The carnallite is mined by using hot water, which reduces the content of sodium chloride in the potassium-rich saturated brine; artificial sylvine is only subjected to low-temperature selective dissolution once, which avoids unnecessary energy consumption and impurity accumulation unnecessary for multifold cycles of thermal dissolution-cold crystallization treatment of sylvine while guaranteeing the high yield and high quality of potassium chloride. The method is suitable for different grades of carnallite, has extremely strong adaptability and loose technical conditions, and is conducive to promotion and implementation.
-
-
-
搜索结果
4 条记录 (耗时 0.015 秒)
