-
1.发明申请公开(公告)号：US20220234036A1
公开(公告)日：2022-07-28
申请号：US17335019
申请日：2021-05-31
发明人： Yanan Liu , Junting Feng , Fengzhi Fu , Dianqing Li , Yufei He
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
发明人： Yanan Liu , Junting Feng , Fengzhi Fu , Dianqing Li , Yufei He
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.
-
3.发明授权公开(公告)号：US09475705B2
公开(公告)日：2016-10-25
申请号：US14441778
申请日：2013-05-21
发明人： Yanjun Lin , Kaitao Li , Bo Ning , Dianqing Li , Xue Duan , Chenfa Wen , Xuchang Tan
IPC分类号： C01G9/02 , C01F7/00 , C07F15/04 , B01J19/18 , C01B13/36 , C01G53/00 , C01G9/00 , B01J8/20 , B01J8/22 , B01J8/00 , B01F7/16
CPC分类号： C01G9/02 , B01F7/1635 , B01J8/0005 , B01J8/006 , B01J8/20 , B01J8/222 , B01J19/18 , B01J2208/00106 , B01J2208/00867 , B01J2219/185 , C01B13/366 , C01F7/004 , C01F7/005 , C01G9/006 , C01G53/006 , C01P2002/22 , C01P2002/72 , C01P2004/03 , C01P2004/20 , C01P2004/50 , C01P2004/52 , C01P2004/61 , C01P2004/62 , C07F15/04
摘要： The present invention belongs to the synthesis technology field of inorganic functional materials, and particularly provides a self-balanced high-pressure and high-shear autoclave and its application in the preparation of layered double hydroxides (LDHs). In this invention, by imbedding the handpiece of emulsification mill into the autoclave, and by taking the motor driving system outside of the autoclave, the pressure of the autoclave can be highly stable by the use of self-balanced seal gland. These characters solve the problem that the typical emulsification mill cannot be used in high-pressure system, and ensure the crystallization under the high-pressure and high-shear conditions. Such autoclave takes the advantages of additional equipment, and eliminates the volume effect in the amplification process. By the use of this new autoclave, the reaction time can be shorten from 24 hours to 2-6 hours, the reaction temperature can be reduced from 180° C. to 140° C. The LDHs products with small particle size and narrow size distribution are obtained. These results are better than those prepared at the laboratory level.
摘要翻译： 本发明属于无机功能材料的合成技术领域，特别提供了一种自平衡的高压高剪切高压釜及其在层状双氢氧化物（LDH）的制备中的应用。 在本发明中，通过将乳化机的手持件嵌入高压釜中，并且通过将电动机驱动系统置于高压釜外部，通过使用自平衡密封压盖，高压釜的压力可以高度稳定。 这些特点解决了典型乳化机不能在高压系统中使用的问题，确保了在高压高剪切条件下的结晶。 这种高压釜具有附加设备的优点，并消除了放大过程中的体积效应。 通过使用这种新的高压釜，反应时间可以从24小时缩短到2-6小时，反应温度可以从180℃降低到140℃。具有小粒度和窄尺寸分布的LDHs产物 获得。 这些结果比实验室水平好。
-
公开(公告)号：US10913052B1
公开(公告)日：2021-02-09
申请号：US16493275
申请日：2018-11-02
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.
-
5.发明公开公开(公告)号：US20240082833A1
公开(公告)日：2024-03-14
申请号：US18452032
申请日：2023-08-18
发明人： Yanan Liu , Dianqing Li , He Yu , Ning Li
IPC分类号： B01J37/02 , B01J21/04 , B01J27/045 , B01J27/051 , B01J35/00 , B01J35/10 , B01J37/04 , B01J37/06 , B01J37/08 , B01J37/16 , C07C1/30 , C07C5/32 , C07C29/145
CPC分类号： B01J37/0201 , B01J21/04 , B01J27/045 , B01J27/051 , B01J27/0515 , B01J35/0066 , B01J35/1014 , B01J35/1019 , B01J35/1038 , B01J35/1042 , B01J35/1047 , B01J35/1061 , B01J37/0236 , B01J37/04 , B01J37/06 , B01J37/08 , B01J37/16 , C07C1/30 , C07C5/322 , C07C29/145 , C07C2521/02 , C07C2523/28 , C07C2523/72 , C07C2527/051
摘要： The present invention provides a supported metal catalyst with synergistic sites, a preparation method therefor and an application thereof. The preparation method of this catalyst is to utilize the unsaturated cubane-like structure, M cation with catalytic activity is introduced into the cluster core unit. By using the vertex vacancy as the capturing center, and adjusting the impregnation temperature to maximize the loading of the cluster precursor, as well as depending on the electrostatic adsorption of the support and the confinement of the cluster structural unit, the number of S vacancies and the distance between S vacancies and Miso sites are effectively controlled through liquid phase reduction and atmosphere treatment at room temperature to obtain supported X3MSx/Al2O3 catalyst with Miso-Vs synergistic sites. The method of the present invention achieves the joint enhancement of the activity, product selectivity, and stability of unsaturated carbon oxygen bond selective hydrogenation, carbon chlorine bond selective hydrogenation dechlorination, and carbon hydrogen bond dehydrogenation reactions. This catalyst is mainly used in various catalytic reaction processes in the fields of petrochemical, fine chemical, environmental chemical, and other fields. It has outstanding catalytic performance, excellent activity, selectivity, and good recyclability, and is easy to recover and reuse.
-
-
-
-
搜索结果
5 条记录 (耗时 0.015 秒)
