公开(公告)号：US20160137557A1

公开(公告)日：2016-05-19

申请号：US14898471

申请日：2014-05-09

Applicant: NANJING UNIVERSITY OF TECHNOLOGY

Inventor： Xuehong GU ,  Zhenzhou SHI ,  Yuanyuan CHEN ,  Chun ZHANG ,  Nanping XU

IPC: C04B35/622 ,  B01D69/08 ,  B01D67/00 ,  B01D71/02

CPC classification number: C04B35/6225 ,  B01D67/0041 ,  B01D69/081 ,  B01D69/082 ,  B01D71/024 ,  B01D71/025 ,  B01D2325/04 ,  B01D2325/24 ,  C04B2235/3246 ,  C04B2235/6021

Abstract: The Invention relates to a method for preparing a multichannel hollow fiber membrane. According to a certain ratio, ceramic powder, a macromolecular polymer, an organic solvent, and a dispersant are mixed evenly to prepare a membrane casting solution; and after bubble removing processing is performed on the membrane casting solution, a membrane green body is formed with the cooperation of a multichannel hollow fiber die and phase inversion. After the membrane green body is roasted at a high temperature, a multichannel ceramic hollow fiber membrane is formed. The multichannel ceramic hollow fiber membrane has an asymmetric structure and a skeleton structure in an inner cavity and can meet the strength and flux requirements of a ceramic hollow fiber membrane.

Abstract translation: 本发明涉及一种制备多通道中空纤维膜的方法。 按照一定的比例，将陶瓷粉末，高分子聚合物，有机溶剂和分散剂均匀混合以制备膜浇铸溶液; 并且在膜浇铸溶液进行气泡去除处理之后，通过多通道中空纤维管芯的配合形成膜生坯并进行相转化。 在高温下烘烤膜生坯后，形成多孔陶瓷中空纤维膜。 多通道陶瓷中空纤维膜在内腔中具有不对称结构和骨架结构，可以满足陶瓷中空纤维膜的强度和通量要求。

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。