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公开(公告)号:US20240417829A1
公开(公告)日:2024-12-19
申请号:US18819299
申请日:2024-08-29
Applicant: CENTRAL SOUTH UNIVERSITY
Inventor: Xiaobo MIN , Fei CHAI , Feiping ZHAO , Liyuan CHAI , Yanjie LIANG , Cong PENG , Yiwei ZHOU
Abstract: The present disclosure provides a preparation method of arsenic iron alloy, which includes the following steps: ball milling arsenic powder and iron powder under the protection of inert atmosphere according to a molar ratio of 0.1˜0.35:1 or 0.35˜2:1 to obtain pretreated material; vacuum hot pressed sintering the pretreated material to obtain arsenic iron alloy. The vacuum hot press sintering process includes: placing the pretreated material in a vacuum environment; and sintering the pretreated material; in the sintering process, a pressure of 30˜50 MPa is applied to the pretreated material. The sintering process includes: heating the pretreated material from room temperature to 400˜500° C., and holding for 0.5˜1 h; and heating the pretreated material from 400˜500° C. to 600˜800° C., and holding for 0.5˜1 h. The present disclosure can obtain arsenic iron alloy with high performance and low leaching toxicity.
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公开(公告)号:US20220316078A1
公开(公告)日:2022-10-06
申请号:US17707903
申请日:2022-03-29
Applicant: CENTRAL SOUTH UNIVERSITY
Inventor: Hui LIU , Kaisong XIANG , Liyuan CHAI , Fenghua SHEN , Xudong LIU , Fangfang ZHU , Lin WU , Huimin YI , Xiaobo MIN , Zhang LIN , Qingzhu LI , Qingwei WANG , Haiying WANG , Weichun YANG
IPC: C25B9/23 , C25B1/01 , C25B1/50 , C25B11/052 , C25B11/057 , C25B11/081 , C25B11/075 , C25B15/08 , B01D53/50 , B01D53/78
Abstract: A method for preparing hydrogen sulfide from sulfur dioxide by electrochemical reduction includes electrochemically reducing sulfur dioxide absorbed in an aqueous solution into gaseous hydrogen sulfide with a membrane electrode, resulting in efficient and selective conversion of the sulfur dioxide absorbed in the aqueous solution into the hydrogen sulfide to avoid a deactivation of a cathode due to colloidal sulfur produced on the cathode and adhesion onto a surface of the cathode, wherein the method is carried out at ambient temperature and normal pressure without addition of a reducing agent, having no waste salts produced, and is simple in operation, and is convenient for large-scale application.
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3.
公开(公告)号:US20230203620A1
公开(公告)日:2023-06-29
申请号:US18072329
申请日:2022-11-30
Applicant: Central South University
Inventor: Liyuan CHAI , Qingwei WANG , Xiaobo MIN , Qingzhu LI , Meiqing SHI
Abstract: The invention provides a complete set of treatment system and method for deep utilization of dolomite resources. The system includes a primary calcination device, a carbon dioxide capture device, a digestion device, a carbonization separation device, a pyrolysis device and a secondary calculation device; the primary calcination device includes a dolomite calciner, a plurality of hoardings and an exhaust pipe, and an exhaust chamber is formed in a surrounding way between the hoardings, the top of the dolomite calciner and the outer wall of the blanking bin; the exhaust chamber is in communication with the carbon dioxide capture device through the exhaust pipe; the carbonization separation device includes a carbonization reaction tank whose gas inlet is in communication with the gas outlet of the carbon dioxide capture device; and the pyrolysis device includes a pyrolysis kettle and a vacuum pump which maintains a negative pressure state in the pyrolysis kettle.
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