公开(公告)号：US20160250623A1

公开(公告)日：2016-09-01

申请号：US15028438

申请日：2014-09-12

Applicant: NANJING UNIVERSITY OF TECHNOLOGY

Inventor： Rizhi CHEN ,  Yaohui BAO ,  Hong JIANG ,  Yiqun FAN ,  Weihong XING

IPC: B01J29/03 ,  B01J37/06

CPC classification number: B01J29/0341 ,  B01J29/0316 ,  B01J29/0325 ,  B01J29/0333 ,  B01J37/06 ,  B01J2229/186 ,  B01J2229/32 ,  C07C37/58 ,  Y02P20/52 ,  C07C39/04

Abstract: 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.

Abstract translation: 本发明涉及一种用于制备苯酚的苯羟基化催化剂及其制备方法，其中所述催化剂使用介孔材料作为载体，催化剂通过首先用氨基硅烷改性载体的表面，然后用乙酰丙酮盐 的金属，最后洗涤和干燥。 本发明的优点是将反应性金属负载在硅烷改性介孔材料上以形成均相 - 非均相复合催化剂，其中反应性金属组分以均匀形式存在于反应体系中，这确保了高的催化性能 催化剂组分，并通过氨基硅烷的桥接作用负载在载体上，改善了金属组分与载体之间的作用力，提高了催化剂的稳定性，有利于催化剂与产物的分离。 该催化剂具有简单的制备方法，具有优异的催化性能，可应用于苯羟基化反应体系制备苯酚。

公开(公告)号：US20190040003A1

公开(公告)日：2019-02-07

申请号：US16062630

申请日：2015-07-31

Applicant: Nanjing University of Technology

Inventor： Weihong XING ,  Honglin MAO ,  Rizhi CHEN ,  Hongnian SHANG ,  Nanping XU

IPC: C07C249/04 ,  C07C251/44 ,  C07C251/38

Abstract: 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%.

公开(公告)号：US20170044021A1

公开(公告)日：2017-02-16

申请号：US15306491

申请日：2014-09-12

Applicant: Nanjing University of Technology

Inventor： Weihong XING ,  Zhilong XU ,  Nanping XU ,  Zhaoxiang ZHONG ,  Feng ZHANG

IPC: C01G9/02 ,  B01J19/24 ,  B01J14/00

CPC classification number: C01G9/02 ,  B01J14/00 ,  B01J19/2415 ,  B01J19/2475 ,  B01J2219/00033 ,  B82Y30/00 ,  C01P2002/72 ,  C01P2004/03

Abstract: The present invention relaters to a method for continuously preparing a nano zinc oxide with a membrane reactor. A zinc salt solution and a precipitator solution required for the preparation of a zinc oxide are respectively used as dispersion phases, and under the action of a certain pressure, the two reaction solutions respectively penetrate through a membrane tube at a certain rate and disperse quickly under the action of a shear force and react, producing a precursor precipitate. A precursor suspension penetrates through the membrane tube continuously and circularly after being pressurized by a pump, and at the same time, deionized water as a washing fluid is added to a suspension storage tank, wherein impurity ions penetrate through membrane pores and are discharged along with the liquid medium; after the concentration of the impurity ions meets requirements, the concentrated solution is discharged continuously and then spray-dried to obtain a basic zinc carbonate precursor powder. The basic zinc carbonate powder is calcined under certain conditions to obtain the nanostructured zinc oxide powder. The continuous preparation and washing of a powder can be achieved by coupling a membrane washing technique with a membrane dispersion technique. The procedure is simple, the structure of zinc oxide is easy to control and the yield is high.

Abstract translation: 本发明涉及一种用膜反应器连续制备纳米氧化锌的方法。 分别使用锌盐溶液和制备氧化锌所需的沉淀剂溶液作为分散相，并且在一定压力的作用下，两种反应溶液分别以一定速率穿过膜管并快速分散在 剪切力的作用并反应，产生前体沉淀。 前驱体悬浮液在被泵加压之后，连续循环地穿过膜管，同时将去离子水作为洗涤液加入到悬浮储罐中，其中杂质离子穿过膜孔并与 液体介质; 杂质离子浓度满足要求后，浓缩溶液连续排出，然后喷雾干燥，得到碱式碳酸锌前体粉末。 碱性碳酸锌粉末在一定条件下煅烧得到纳米结构氧化锌粉末。 通过将膜洗涤技术与膜分散技术结合可以实现粉末的连续制备和洗涤。 操作简单，氧化锌结构易于控制，产量高。