公开(公告)号：US20240200218A1

公开(公告)日：2024-06-20

申请号：US18287658

申请日：2022-04-25

Applicant: CENTRAL SOUTH UNIVERSITY

Inventor： Zhongwei ZHAO ,  Fenglong SUN ,  Hu FU ,  Xingyu CHEN

IPC: C25C3/28 ,  C25C7/02 ,  C25C7/06

CPC classification number: C25C3/28 ,  C25C7/025 ,  C25C7/06

Abstract: A method for preparing titanium metal by molten salt electrolysis is provided. The method includes constructing an electrochemical system, where an anode chamber is filled with an anode molten salt electrolyte that contains a titanium-containing raw material and inserted with an anode, a cathode chamber is filled with a cathode molten salt electrolyte and inserted with a cathode, and the anode molten salt electrolyte and the cathode molten salt electrolyte are not in contact with each other, but are connected by a liquid alloy at the bottom of the electrolytic cell; the system for electrolysis is powered on to obtain the titanium metal product at the cathode. The method of the present disclosure can treat low-quality titanium-containing materials, can be operated continuously, and can obtain relatively high-quality titanium.

公开(公告)号：US20230158424A1

公开(公告)日：2023-05-25

申请号：US17992949

申请日：2022-11-23

Applicant: CENTRAL SOUTH UNIVERSITY

Inventor： Jiangtao LI ,  Zhongwei ZHAO ,  Zhichao LI ,  Xingyu CHEN ,  Xuheng LIU ,  Lihua HE ,  Fenglong SUN ,  Yongjin LUO ,  Muye CUI

IPC: B01D9/00 ,  C01G39/00

CPC classification number: B01D9/0063 ,  B01D9/005 ,  C01G39/006 ,  B01D2009/0086 ,  C01P2002/72 ,  C01P2004/03

Abstract: A method for crystallization of β-ammonium tetramolybdate includes: performing a stepwise pH-adjusting treatment of an ammonium molybdate solution via zoning to obtain the β-ammonium tetramolybdate. When feeding the ammonium molybdate solution into a reaction system from a first zone and then into second to sixth zones successively, pH1 of a resultant solution in the first zone is 7.0-6.0; pH2 of a resultant solution in the second zone is less than 6 and greater than or equal to 4; pH3 of a resultant solution in the third zone is less than 4 and greater than or equal to 2.5; pH4 of a crystallized slurry in the fourth zone is less than 2.5 and greater than or equal to 1; pH5 of a crystallized slurry in the fifth zone is 2.5-4.0; and pH6 of a crystallized slurry in the sixth zone is less than 2.5 and greater than or equal to 2.0.

公开(公告)号：US20240191382A1

公开(公告)日：2024-06-13

申请号：US18287659

申请日：2022-04-25

Applicant: CENTRAL SOUTH UNIVERSITY

Inventor： Zhongwei ZHAO ,  Yuntao LEI ,  Fenglong SUN

IPC: C25C3/36 ,  B01D3/10 ,  C22C1/00 ,  C22C28/00 ,  C25C7/02

CPC classification number: C25C3/36 ,  B01D3/10 ,  C22C1/00 ,  C22C28/00 ,  C25C7/025

Abstract: A method for preparing rare earth alloys by molten salt electrolysis using rare earth oxides as the raw material is provided, where the electrolytic cell used is divided into the anode chamber and the cathode chamber containing melts such as anolyte, catholyte and liquid alloy. The method has the advantages of continuous production, high operability, low requirements on raw material purity and high quality of rare earth alloy products.

公开(公告)号：US20240183050A1

公开(公告)日：2024-06-06

申请号：US18287654

申请日：2022-04-25

Applicant: CENTRAL SOUTH UNIVERSITY

Inventor： Zhongwei ZHAO ,  Fenglong SUN ,  Yuntao LEI

IPC: C25C3/02 ,  C25C7/02

CPC classification number: C25C3/02 ,  C25C7/025

Abstract: A method for preparing lithium metal by molten salt electrolysis is provided. The method is carried out by using an electrolytic cell. The electrolytic cell is divided into an anode chamber and a cathode chamber. The anode chamber is filled with an anode molten salt electrolyte and inserted with an anode, and the cathode chamber is filled with a cathode molten salt electrolyte and inserted with a cathode. The bottom of the electrolytic cell is further filled with a liquid alloy. After the electrolytic cell is powered on, raw materials including lithium chloride, lithium carbonate, lithium hydroxide, lithium oxide, etc. are added into the anode chamber so as to obtain a lithium metal product in the cathode chamber. The method of the present invention has advantages such as continuous production, low requirements for a lithium chloride raw material, and high purity of a lithium metal product.

公开(公告)号：US20240141529A1

公开(公告)日：2024-05-02

申请号：US18288406

申请日：2022-04-25

Applicant: CENTRAL SOUTH UNIVERSITY

Inventor： Zhongwei ZHAO ,  Fenglong SUN ,  Yuntao LEI

IPC: C25C3/18 ,  C22C9/01 ,  C22C13/00 ,  C22C21/12 ,  C22C21/18 ,  C22C28/00 ,  C25C3/08

CPC classification number: C25C3/18 ,  C22C9/01 ,  C22C13/00 ,  C22C21/12 ,  C22C21/18 ,  C22C28/00 ,  C25C3/08

Abstract: A method for producing metal aluminum by molten salt electrolysis of aluminum oxide is provided. The method for producing metal aluminum by molten salt electrolysis of aluminum oxide uses an electrolytic cell. The electrolytic cell is divided into an anode chamber and a cathode chamber, and is filled with melts such as anolyte, catholyte and an alloy medium. The electrolytic cell is powered on to operate and an aluminum oxide raw material is added to the anode chamber to obtain high-purity metal aluminum in the cathode chamber. The disclosure provides an aluminum electrolysis method having the advantages of strong electrolysis operation adaptability, large selectivity of electrolysis materials and raw materials, being energy saving and environmentally friendly, and being capable of directly producing refined aluminum or high-purity aluminum.