公开(公告)号：US20220305479A1

公开(公告)日：2022-09-29

申请号：US17291250

申请日：2020-01-14

申请人： Wanhua Chemical Group Co., Ltd.

发明人： Lei WANG ,  Tongji WANG ,  Fei YE ,  Kang SUN ,  Naibo CHU ,  Qiankun JIAO ,  Yuan LI

IPC分类号： B01J37/00 ,  B01J37/08 ,  B01J21/08 ,  B01J21/06 ,  B01J23/28 ,  B01J35/10 ,  C07D301/14

摘要： Provided are a preparation method for a propylene epoxidation catalyst, and a use thereof. During the preparation, an alkoxide solution of a prepared active component and a silica gel support are mixed, then a rotary evaporation treatment is performed on the mixture to remove a low-carbon alcohol to obtain a catalyst precursor, and then the obtained catalyst precursor is subjected to calcination and silylation treatments to obtain the propylene epoxidation catalyst. The catalyst is prepared in a simple process, can be applied to the chemical process of preparing propylene oxide by propylene epoxidation, has high average selectivity to propylene oxide, and has industrial application prospect.

公开(公告)号：US20200147599A1

公开(公告)日：2020-05-14

申请号：US16484574

申请日：2018-05-24

申请人： WANHUA CHEMICAL GROUP CO., LTD.

发明人： Lei WANG ,  Tongji WANG ,  Fei YE ,  Lichao YANG ,  Guangquan YI ,  Jiaoying CUI ,  Naibo CHU ,  Yuan LI ,  Weiqi HUA

IPC分类号： B01J37/02 ,  C07D301/19 ,  B01J37/08 ,  B01J21/06 ,  B01J21/08 ,  C07D303/04

摘要： Disclosed in the present invention are a preparation method for an olefin epoxidation catalyst and applications thereof. The method comprises: loading an auxiliary metal salt onto a silica gel carrier, and carrying out a drying treatment to the silica gel carrier; loading a titanium salt (preferably TiCl4) onto the silica gel carrier by a chemical vapor deposition method; calcining to obtain a silica gel on which the auxiliary metal oxide and Ti species are loaded; obtaining an catalyst precursor (Ti-MeO—SiO2 composite oxide) by water vapor washing; loading alkyl silicate (preferably tetraethyl orthosilicate) onto the surface of the catalyst precursor by a chemical vapor deposition method and calcining the catalyst precursor to obtain a Ti-MeO—SiO2 composite oxide with the surface coated with a SiO2 layer; and carrying out a silylanization treatment to obtain the catalyst. The catalyst can be applied to a chemical process of propylene epoxidation to prepare propylene oxide, and has an average selectivity to PO up to 96.7%, the method of the present invention and the applications thereof have industrial application prospects.