公开(公告)号：US11110437B2

公开(公告)日：2021-09-07

申请号：US16514422

申请日：2019-07-17

Applicant: BAOTOU RESEARCH INSTITUTE OF RARE EARTHS ,  NATIONAL ENGINEERING RESEARCH CENTRE OF RUIKE RARE EARTH METALLURGY AND FUNCTION MATERIALS CO., LTD. ,  HEBEI HWAT AUTOMOBILE COMPONENTS CO., LTD.

Inventor： Wenyi Zhao ,  Yan Wang ,  Zhaoqiang Li ,  Cheng Zhang ,  Rongrong Fan ,  Xin Guo ,  Yu Wang ,  Rong Wang ,  Lihua Song ,  Yanhai Song ,  Yuan Li ,  Zhiyong Ding ,  Jing Song

IPC: B01J23/30 ,  B01J23/83 ,  B01J37/00 ,  B01J37/04 ,  B01J37/06 ,  B01J37/08 ,  B01J37/10 ,  B01J37/34 ,  B01J35/00 ,  B01D53/94

Abstract: A method for preparing an SCR catalyst may include: (1) placing a first aqueous solution containing a titanium oxide and a tungstate in an electric field environment, adjusting the pH value of the first aqueous solution, and adjusting the current direction of the electric field environment to obtain a first mixture; (2) providing a second mixture by, in the electric field environment, adding dropwise a second aqueous solution containing a soluble salt of one or more active components, a copper-organic polyamine complex and a dispersant to the first mixture, and adjusting the current direction; and (3) processing the second mixture to obtain the SCR catalyst. The one or more active components may be selected from Ce, Zr, Cu, Fe, Pr and Sc.

公开(公告)号：US20210283586A1

公开(公告)日：2021-09-16

申请号：US17330137

申请日：2021-05-25

Applicant: BAOTOU RESEARCH INSTITUTE OF RARE EARTHS ,  NATIONAL ENGINEERING RESEARCH CENTRE OF RUIKE RARE EARTH METALLURGY AND FUNCTION MATERIALS CO., LTD.

Inventor： Yan Wang ,  Zhaoqiang Li ,  Zhiyong Ding ,  Rongrong Fan ,  Cheng Zhang ,  Yu Wang ,  Xin Guo ,  Na Kang ,  Wei Liu ,  Rong Wang ,  Jing Song

IPC: B01J29/70 ,  F01N3/08 ,  F01N3/20 ,  B01J35/10 ,  B01J37/10 ,  B01J37/34 ,  B01J37/06

Abstract: The present invention discloses a molecular sieve and its preparation method. The molecular sieve has micromorphology in a football shape and consists of molecular sieve framework and active elements. The molecular sieve framework comprises silicon element and aluminum element; the active elements comprise copper element and rare earth elements. The rare earth elements are one or more selected from the group consisting of La, Ce, Pr, Nd, Pm, Sm, Eu, Sc and Y. The mass ratio of the silicon element to the aluminum element is 3-9:1. The content of the copper element in the molecular sieve is 1.5-3.2 wt %. The mass of rare earth elements is 50 ppm-2 wt % of the molecular sieve framework. The mass of the silicon element is calculated by silicon dioxide, the mass of aluminum element is calculated by aluminum oxide, the mass of copper element is calculated by copper oxides, and the mass of rare earth elements is calculated by rare earth oxides. The molecular sieve has a high catalytic activity in a temperature range of 175-550° C. and a good resistance to hydrothermal aging.

公开(公告)号：US20230233981A1

公开(公告)日：2023-07-27

申请号：US18193895

申请日：2023-03-31

Applicant: BAOTOU RESEARCH INSTITUTE OF RARE EARTHS

Inventor： Hao Tian ,  Jincheng Guo ,  Shaochun Hou ,  Hui Xu ,  Erdou Li ,  Jing Song

IPC: B01D47/06

CPC classification number: B01D47/06 ,  B01D2257/60 ,  B01D2247/04

Abstract: The present disclosure provides a treatment device for an exhaust gas from rare earth calcination, comprising a spray apparatus in which a sprayer is arranged, the sprayer comprising an input pipe, a nozzle, a toothed ring, a rotating impeller, a first gear, and a second gear, wherein the input pipe is configured to input a spray liquid to the nozzle; wherein the nozzle is arranged to be more than one, rotatably connected to the input pipe, arranged in a ring shape. The treatment device enables more uniform contact between the exhaust gas and the spray liquid.

公开(公告)号：US11590480B2

公开(公告)日：2023-02-28

申请号：US17330137

申请日：2021-05-25

Applicant: BAOTOU RESEARCH INSTITUTE OF RARE EARTHS ,  NATIONAL ENGINEERING RESEARCH CENTRE OF RUIKE RARE EARTH METALLURGY AND FUNCTION MATERIALS CO., LTD.

Inventor： Yan Wang ,  Zhaoqiang Li ,  Zhiyong Ding ,  Rongrong Fan ,  Cheng Zhang ,  Yu Wang ,  Xin Guo ,  Na Kang ,  Wei Liu ,  Rong Wang ,  Jing Song

IPC: B01J29/70 ,  B01J35/10 ,  B01J37/06 ,  B01J37/10 ,  B01J37/34 ,  F01N3/08 ,  F01N3/20

Abstract: The present invention discloses a molecular sieve and its preparation method. The molecular sieve has micromorphology in a football shape and consists of molecular sieve framework and active elements. The molecular sieve framework comprises silicon element and aluminum element; the active elements comprise copper element and rare earth elements. The rare earth elements are one or more selected from the group consisting of La, Ce, Pr, Nd, Pm, Sm, Eu, Sc and Y. The mass ratio of the silicon element to the aluminum element is 3-9:1. The content of the copper element in the molecular sieve is 1.5-3.2 wt %. The mass of rare earth elements is 50 ppm-2 wt % of the molecular sieve framework. The mass of the silicon element is calculated by silicon dioxide, the mass of aluminum element is calculated by aluminum oxide, the mass of copper element is calculated by copper oxides, and the mass of rare earth elements is calculated by rare earth oxides. The molecular sieve has a high catalytic activity in a temperature range of 175-550° C. and a good resistance to hydrothermal aging.

公开(公告)号：US20220371908A1

公开(公告)日：2022-11-24

申请号：US17816857

申请日：2022-08-02

Applicant: BAOTOU RESEARCH INSTITUTE OF RARE EARTHS

Inventor： Shengfeng Ma ,  Yanhui Xu ,  Yu Li ,  Weihua Guan ,  Kai Gao ,  Jing Song

IPC: C01F17/206 ,  C01F17/247

Abstract: The present disclosure discloses a method for preparing rare earth oxide by recycling ammonia and carbon, comprising the steps of: (1) heating raw materials containing a first rare earth carbonate and a first rare earth oxide with microwave and calcining at 500-1000° C. for 20-120 min to obtain a second rare earth oxide and carbon dioxide; (2) reacting carbon dioxide with a first ammonia water to obtain a precipitant; (3) reacting the precipitant with rare earth chloride to obtain a second rare earth carbonate and ammonium chloride wastewater. In the method, calcination time is short, rare earth recovery rate, utilization rate of ammonia and carbon resources are high. The present disclosure also provides a use of a rare earth oxide in shortening calcination time and/or increasing rare earth yield.

公开(公告)号：US20200038845A1

公开(公告)日：2020-02-06

申请号：US16514422

申请日：2019-07-17

Applicant: BAOTOU RESEARCH INSTITUTE OF RARE EARTHS ,  NATIONAL ENGINEERING RESEARCH CENTRE OF RUIKE RARE EARTH METALLURGY AND FUNCTION MATERIALS CO., LTD. ,  HEBEI HWAT AUTOMOBILE COMPONENTS CO., LTD.

Inventor： Wenyi Zhao ,  Yan Wang ,  Zhaoqiang Li ,  Cheng Zhang ,  Rongrong Fan ,  Xin Guo ,  Yu Wang ,  Rong Wang ,  Lihua Song ,  Yanhai Song ,  Yuan Li ,  Zhiyong Ding ,  Jing Song

IPC: B01J23/83 ,  B01J23/30 ,  B01J35/00 ,  B01J37/04 ,  B01J37/34 ,  B01J37/10 ,  B01J37/00 ,  B01J37/06 ,  B01J37/08 ,  B01D53/94

Abstract: A method for preparing an SCR catalyst may include: (1) placing a first aqueous solution containing a titanium oxide and a tungstate in an electric field environment, adjusting the pH value of the first aqueous solution, and adjusting the current direction of the electric field environment to obtain a first mixture; (2) providing a second mixture by, in the electric field environment, adding dropwise a second aqueous solution containing a soluble salt of one or more active components, a copper-organic polyamine complex and a dispersant to the first mixture, and adjusting the current direction; and (3) processing the second mixture to obtain the SCR catalyst. The one or more active components may be selected from Ce, Zr, Cu, Fe, Pr and Sc.