公开(公告)号：US20220234036A1

公开(公告)日：2022-07-28

申请号：US17335019

申请日：2021-05-31

申请人： Beijing University of Chemical Technology

发明人： Yanan Liu ,  Junting Feng ,  Fengzhi Fu ,  Dianqing Li ,  Yufei He

IPC分类号： B01J37/03 ,  B01J37/08 ,  C07C5/09 ,  B01J23/78 ,  B01J37/02 ,  B01J37/06 ,  B01J37/16

摘要： Cuy/MMgOx interfacial catalyst for selective alkyne hydrogenation and its preparation method are disclosed. The preparation method of the catalyst includes: the mixture of salt and alkali solution is nucleated momentarily by nucleation/crystallization isolation method, preparing the composite metal hydroxide CuyMMg4-LDHs as precursor, which has typical hexagonal morphology of the double hydroxide; the precursor is topologically transformed by heat treatment to produce unsaturated oxide; the catalyst with Cuy-MMgOx interface structure is prepared by separating and electronically modifying Cu particles. By adjusting the ratio of Cu2+/M3+ in LDHs, the electronic and geometric structure of Cuy-MMgOx interface can be flexibly controlled, thus enhancing the reaction activity, product selectivity and stability. The catalyst can be used in the selective hydrogenation of various alkynes in the fields of petrochemical and fine chemical industry, with the outstanding catalytic activity and C═C double bond selectivity. The catalyst also has good reusability.

公开(公告)号：US11691138B2

公开(公告)日：2023-07-04

申请号：US17335019

申请日：2021-05-31

申请人： Beijing University of Chemical Technology

发明人： Yanan Liu ,  Junting Feng ,  Fengzhi Fu ,  Dianqing Li ,  Yufei He

IPC分类号： B01J37/03 ,  B01J23/78 ,  B01J37/02 ,  B01J37/06 ,  B01J37/08 ,  B01J37/16 ,  C07C5/09

CPC分类号： B01J37/035 ,  B01J23/78 ,  B01J37/0236 ,  B01J37/06 ,  B01J37/08 ,  B01J37/16 ,  C07C5/09

摘要： Cuy/MMgOx interfacial catalyst for selective alkyne hydrogenation and its preparation method are disclosed. The preparation method of the catalyst includes: the mixture of salt and alkali solution is nucleated momentarily by nucleation/crystallization isolation method, preparing the composite metal hydroxide CuyMMg4-LDHs as precursor, which has typical hexagonal morphology of the double hydroxide; the precursor is topologically transformed by heat treatment to produce unsaturated oxide; the catalyst with Cuy-MMgOx interface structure is prepared by separating and electronically modifying Cu particles. By adjusting the ratio of Cu2+/M3+ in LDHs, the electronic and geometric structure of Cuy-MMgOx interface can be flexibly controlled, thus enhancing the reaction activity, product selectivity and stability. The catalyst can be used in the selective hydrogenation of various alkynes in the fields of petrochemical and fine chemical industry, with the outstanding catalytic activity and C═C double bond selectivity. The catalyst also has good reusability.

公开(公告)号：US20230191373A1

公开(公告)日：2023-06-22

申请号：US18074494

申请日：2022-12-04

申请人： Beijing University of Chemical Technology

发明人： Junting Feng ,  Dianqing LI ,  Qian Wang ,  Jiaxuan Fan ,  Xiaoxue Yue ,  Yufei He ,  Yanan Liu

IPC分类号： B01J27/232 ,  B01J37/00 ,  B01J37/04 ,  B01D53/14 ,  B01J35/00 ,  B01J21/02 ,  B01J23/00 ,  B01J38/02 ,  B01J38/48

CPC分类号： B01J27/232 ,  B01J37/0036 ,  B01J37/04 ,  B01D53/1425 ,  B01J35/004 ,  B01J21/02 ,  B01J23/007 ,  B01J38/02 ,  B01J38/48 ,  B01D2255/65 ,  B01D2255/902 ,  B01D2255/802 ,  B01D2257/504 ,  B01D2259/802

摘要： The present invention discloses a catalyst for in-situ CO2 capture and coupling reduction with biomass oxidation, a preparation method therefor and an application thereof. The catalyst is applied to the coupling reaction of photocatalytic CO2 reduction and biomass oxidation. The preparation of the catalyst is to synthesize layered double hydroxides (LDHs) containing CO32− between layers by using coprecipitation method, hydrothermal method, sol-gel method and the like, wherein the chemical formula is [M1-x2+Mx3+(OH)2]x+(An−)x/n·mH2O, which has a thickness of 20-30 nm and an average particle diameter of 60-90 nm. Then metal ion vacancy defects are produced on LDHs laminate by using a NaOH/KOH selective etching to obtain the corresponding catalyst. The catalyst is used in photocatalytic reaction, characterized in that CO32− is continuously consumed in the reaction process, and the catalyst can absorb CO2 in the air for recovery after the reaction, and can be repeatedly used to continuously consume CO2 in the air, thus realizing the direct capture and effective utilization of CO2.

公开(公告)号：US10913052B1

公开(公告)日：2021-02-09

申请号：US16493275

申请日：2018-11-02

申请人： BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY

发明人： Dianqing Li ,  Rui Ma ,  Yufei He ,  Yongjun Feng ,  Junting Feng

IPC分类号： B01J23/52 ,  B01J23/46 ,  B01J27/236 ,  B01J21/08 ,  B01J21/04 ,  B01J37/34 ,  B01J37/16 ,  B01J37/02 ,  B01J37/00 ,  B01J37/06 ,  C07C5/09 ,  B01J23/50

摘要： The purpose of the invention is to provide a supported bimetallic core-shell structure catalyst and its preparation method. Supporter, metal salt and reducing agent solution are mixed to synthesize the catalyst M@PdM/ZT by using a one-step synthesis method, wherein the active metal particle M@PdM as core-shell structure, M Is the core representing one of the Ag, Pt, Au and Ir. ZT is the supporter, representing one of hydrotalcite (Mg2Al-LDH), alumina (Al2O3) and silica (SiO2). By changing the temperature and the reaction time to control the kinetic behavior of the reduction of two kinds of metal ions to realize the construction of core-shell structure. Active metal particle composition and shell thickness are regulated by controlling metal ion concentration. The bimetallic core-shell catalyst prepared by this method showed excellent selectivity and stability in acetylene selective hydrogenation and anthraquinone hydrogenation.