公开(公告)号：US12090467B2

公开(公告)日：2024-09-17

申请号：US17859111

申请日：2022-07-07

申请人： NANJING TECH UNIVERSITY ,  NANJING GEKOF INSTITUTE OF ENVIRONMENTAL PROTECTION TECHNOLOGY & EQUIPMENT CO., LTD.

发明人： Haitao Xu ,  Wenyu Ji ,  Mutao Xu ,  Qijie Jin ,  Mingbo Li ,  Jing Song ,  Meng Xu

IPC分类号： B01J37/03 ,  B01D8/00 ,  B01D53/86 ,  B01J23/10 ,  B01J35/00 ,  B01J35/23 ,  B01J37/00 ,  B01J37/02 ,  B01J37/04 ,  B01J37/08 ,  B01J37/20 ,  C01B17/04

CPC分类号： B01J23/10 ,  B01D8/00 ,  B01D53/8609 ,  B01J35/23 ,  B01J37/0036 ,  B01J37/009 ,  B01J37/0221 ,  B01J37/0236 ,  B01J37/031 ,  B01J37/04 ,  B01J37/08 ,  B01J37/20 ,  C01B17/0486 ,  B01D2255/2061 ,  B01D2255/2063

摘要： The present invention provides a catalyst for catalytic reduction of an industrial flue gas SO2 with CO to prepare sulfur, a method for preparing the same and use thereof. A CeO2 nanocarrier is prepared by using a hydrothermal method, La and Y are loaded as active components, pre-sulfurization is conducted with 6% of SO2 and 3% of CO, and finally, the catalyst is prepared. The catalyst has high reactivity and sulfur selectivity and strong stability. The by-product sulfur generated by the reaction is recovered with a solvent CS2, and the solvent CS2 is recovered by using a distillation process. The preparation method is low in cost, causes no secondary pollution and is high in sulfur recovery rate. The problem of low sulfur production in China at present is solved.

公开(公告)号：US11731874B2

公开(公告)日：2023-08-22

申请号：US17784264

申请日：2020-05-10

申请人： NANJING GEKOF INSTITUTE OF ENVIRONMENTAL PROTECTION TECHNOLOGY & EQUIPMENT CO., LTD. ,  NANJING TECH UNIVERSITY ,  JIANGSU DEYITONG ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. ,  NANJING LIUYAN ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD.

发明人： Haitao Xu ,  Yanzhong Xu ,  Mingbo Li ,  Renyuan Chen ,  Dahua Liu ,  Zhenshan Wu ,  Jing Song ,  Meng Xu

IPC分类号： C01D5/14 ,  C01B17/02 ,  C01B17/04 ,  B01D5/00 ,  B01D46/00 ,  B01D53/50 ,  B01D53/80

CPC分类号： C01B17/0482 ,  B01D5/0072 ,  B01D5/0093 ,  B01D46/0036 ,  B01D53/502 ,  B01D53/80 ,  C01B17/021 ,  C01B17/0232 ,  C01D5/14 ,  B01D2251/304 ,  B01D2251/608 ,  B01D2257/302

摘要： A system for resource recycling of sulfur dioxide includes a charcoal reduction furnace, a high temperature dust remover, a cooling separator A, a liquid sulfur tank, a cooling separator, a tail gas absorption tower, a gas stripping tower, a hypo reactor, a centrifuge, a mother liquor tank and a thickener. And a method for resource recycling of sulfur dioxide includes the following steps: (1) preparing elemental sulfur, (2) removing dust from a process gas containing gaseous sulfur, (3) separating elemental sulfur, (4) reabsorbing residual SO2 gas, (5) purifying sulfur powder, (6) preparing a slurry of cured hypo, (7) performing liquid-solid separation, and (8) preparing an absorption slurry. According to the method, SO2 gas is reduced into liquid sulfur and sulfur powder, and sodium thiosulfate is coproduced.

公开(公告)号：US12097487B2

公开(公告)日：2024-09-24

申请号：US17879060

申请日：2022-08-02

申请人： NANJING TECH UNIVERSITY ,  NANJING GEKOF INSTITUTE OF ENVIRONMENTAL PROTECTION TECHNOLOGY & EQUIPMENT CO., LTD.

发明人： Haitao Xu ,  Qijie Jin ,  Mutao Xu ,  Wenyu Ji ,  Yao Lu ,  Mingbo Li ,  Meng Xu ,  Jing Song

IPC分类号： B01J31/30 ,  B01J23/745 ,  B01J27/128 ,  B01J31/02 ,  B01J35/23 ,  B01J37/04 ,  B09C1/06 ,  B09C1/08

CPC分类号： B01J31/30 ,  B01J23/745 ,  B01J27/128 ,  B01J31/0231 ,  B01J35/23 ,  B01J37/04 ,  B09C1/06 ,  B09C1/08

摘要： A catalyst for inducing thermal desorption of organic matter-contaminated soil and a preparation method thereof, which uses a colloidal mixture of ferroferric oxide and ferric chloride as a catalytic active component of thermal desorption, and carbon tetrachloride as a solvent. Based on the mass of solvent, a mass percentage of catalytic active component is 0.1%-15%. Ammonia water is added dropwise to ferric chloride aqueous solution to react in oil bath to generate a ferroferric oxide colloidal solution, then ferric chloride and obtained ferroferric oxide colloidal solution are added to carbon tetrachloride, and mixed solution is continuously stirred in an oil bath to evaporate solvent water to prepare a catalyst with carbon tetrachloride as solvent. Catalyst is environmentally friendly and can induce thermal desorption of organic matters in soil. 100% desorption of chlorobenzene, o-xylene and benzo[A]anthracene can be achieved at 130° C., and energy consumption of thermal desorption is greatly reduced.