公开(公告)号：US20190023585A1

公开(公告)日：2019-01-24

申请号：US16066902

申请日：2016-09-09

申请人： Central South University

发明人： Liyuan CHAI ,  Qingwei WANG ,  Guomin JIANG ,  Chengyun ZHOU ,  Qingzhu LI ,  Zhihui YANG ,  Weirong GAO

IPC分类号： C02F1/00 ,  C02F1/04 ,  C02F1/26 ,  C02F1/42 ,  C02F1/469 ,  C02F1/68 ,  C02F1/20

CPC分类号： C02F1/001 ,  B01D1/00 ,  B01D3/10 ,  B01D3/143 ,  B01D3/145 ,  C02F1/046 ,  C02F1/048 ,  C02F1/20 ,  C02F1/26 ,  C02F1/42 ,  C02F1/4693 ,  C02F1/68 ,  C02F9/00 ,  C02F2101/101 ,  C02F2101/103 ,  C02F2101/106 ,  C02F2101/14 ,  C02F2101/203 ,  C02F2103/16 ,  C02F2301/08 ,  Y02P10/212

摘要： A method and an apparatus for recovery and deep treatment of a polluted acid. The method comprises the following main steps: (1) selectively adsorbing rare and noble metals, such as rhenium, selenium and the like; (2) separating copper from arsenic to recover the copper; (3) carrying out efficient vulcanization to perform deep arsenic removal; (4) carrying out electrodialysis to pre-concentrate acid; (5) evaporating and concentrating the acid; (6) carrying out an air-stripping method to remove fluorine and chlorine. The polluted acid treatment apparatus mainly comprises a precision filtering tank, a special adsorbing tank, a copper-arsenic separation device, a vulcanization device, an electrodialysis device, an evaporative concentration device, and an air-stripping device. The method and the apparatus can implement efficient recovery of valuable elements in polluted acid wastewater and separate treatment harmful elements, has obvious economical, social and environmental benefits, and has wide application prospects.

公开(公告)号：US20230203620A1

公开(公告)日：2023-06-29

申请号：US18072329

申请日：2022-11-30

申请人： Central South University

发明人： Liyuan CHAI ,  Qingwei WANG ,  Xiaobo MIN ,  Qingzhu LI ,  Meiqing SHI

IPC分类号： C22B26/22 ,  C22B1/02

CPC分类号： C22B26/22 ,  C22B1/02

摘要： 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.

公开(公告)号：US20220316078A1

公开(公告)日：2022-10-06

申请号：US17707903

申请日：2022-03-29

申请人： CENTRAL SOUTH UNIVERSITY

发明人： 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分类号： C25B9/23 ,  C25B1/01 ,  C25B1/50 ,  C25B11/052 ,  C25B11/057 ,  C25B11/081 ,  C25B11/075 ,  C25B15/08 ,  B01D53/50 ,  B01D53/78

摘要： 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.