公开(公告)号：US11033884B2

公开(公告)日：2021-06-15

申请号：US15028438

申请日：2014-09-12

申请人： NANJING UNIVERSITY OF TECHNOLOGY

发明人： Rizhi Chen ,  Yaohui Bao ,  Hong Jiang ,  Yiqun Fan ,  Weihong Xing

IPC分类号： B01J29/03 ,  C07C37/58 ,  B01J35/10 ,  B01J37/06

摘要： The invention relates to a catalyst for benzene hydroxylation for preparation of phenol and a preparation method thereof, wherein said catalyst uses a mesoporous material as carrier, and the catalyst is prepared by first modifying the surface of the carrier using aminosilane, then immersing with acetylacetonate salt of metal, and finally washing and drying. Advantage of the invention is that a reactive metal is loaded on the silane-modified mesoporous material to form a homogeneous-heterogeneous composite catalyst, wherein, the reactive metal component is present in a reaction system in a homogeneous form, which ensures high catalytic performance of the catalyst component, and it is loaded on the carrier through bridging action of aminosilane, which improves the acting force between the metal component and the carrier, enhances stability of the catalyst, and facilitates separation of the catalyst from the product. The catalyst has a simple preparation process, has excellent catalytic performance, and can be applied to the reaction system of benzene hydroxylation for preparation of phenol.

公开(公告)号：US10252985B2

公开(公告)日：2019-04-09

申请号：US16062630

申请日：2015-07-31

申请人： Nanjing University of Technology

发明人： Weihong Xing ,  Honglin Mao ,  Rizhi Chen ,  Hongnian Shang ,  Nanping Xu

IPC分类号： C07C249/04 ,  C07C251/44 ,  B01J29/89 ,  C07C251/38

摘要： The invention relates to a solvent-free green ammoximation process based on membrane distribution with a procedure as: adding TS-1 catalyst and ketone into a reactor in advance; setting the stirring speed and reaction temperature; after reaching the set temperature, adding a certain amount of ammonia and hydrogen peroxide into a reaction solution, wherein the hydrogen peroxide is fed in a way of using membrane as a distributor, the ammonia is fed in a continuous or semi-continuous manner; oxime is produced upon the reaction. The advantages of the invention include the mild reaction conditions, high reacting efficiency, simple operation and environmentally-friendly process. And there is no need to add any solvent during the reaction process. During the ammoximation reaction, both the conversion rate of the ketone and the selectivity of the oxime can be over 98.0%.