US 12,344,579 B2
Built-in micro-interface oxidation system and method for preparing terephthalic acid from p-xylene
Zhibing Zhang, Nanjing (CN); Zheng Zhou, Nanjing (CN); Feng Zhang, Nanjing (CN); Lei Li, Nanjing (CN); Weimin Meng, Nanjing (CN); Baorong Wang, Nanjing (CN); Gaodong Yang, Nanjing (CN); Huaxun Luo, Nanjing (CN); Guoqiang Yang, Nanjing (CN); Hongzhou Tian, Nanjing (CN); and Yu Cao, Nanjing (CN)
Assigned to NANJING YANCHANG REACTION TECHNOLOGY RESEARCH INSTITUTE CO., LTD., Nanjing (CN)
Appl. No. 17/910,299
Filed by NANJING YANCHANG REACTION TECHNOLOGY RESEARCH INSTITUTE CO., LTD., Nanjing (CN)
PCT Filed May 28, 2020, PCT No. PCT/CN2020/092767
§ 371(c)(1), (2) Date Sep. 8, 2022,
PCT Pub. No. WO2021/196386, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 202010243427.X (CN), filed on Mar. 31, 2020.
Prior Publication US 2023/0167043 A1, Jun. 1, 2023
Int. Cl. C07C 51/265 (2006.01); B01D 3/14 (2006.01); B01D 5/00 (2006.01); B01J 4/00 (2006.01); B01J 10/00 (2006.01); B01J 19/24 (2006.01)
CPC C07C 51/265 (2013.01) [B01D 3/14 (2013.01); B01D 5/0063 (2013.01); B01J 4/001 (2013.01); B01J 10/002 (2013.01); B01J 19/245 (2013.01); B01J 2204/002 (2013.01); B01J 2204/005 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A built-in micro-interface oxidation system for preparing terephthalic acid from p-xylene, comprising:
a first reactor, a rectifying tower and a second reactor which are sequentially connected, wherein a first outlet is disposed on a side wall of the first reactor, a first inlet is disposed on a side wall of the second reactor, a material inlet is disposed on a side wall of the rectifying tower, and a material outlet is disposed at a bottom of the rectifying tower;
the first outlet is connected with the material inlet of the rectifying tower, and the first inlet is connected with the material outlet of the rectifying tower;
a plurality of micro-interface units are arranged in the first reactor and the second reactor and used for dispersing and crushing air into bubbles;
wherein the plurality of micro-interface units comprise a first micro-interface generator and a second micro-interface generator which are arranged up and down; the first micro-interface generator is connected with an air guide pipe, and a top end of the air guide pipe extends out of a liquid surface of the first reactor and is used for recovering air; a second inlet is further disposed on the side wall of the first reactor, and a tail end of the second inlet extends into the second micro-interface generator; and a structure of the micro-interface unit in the second reactor is the same as that in the first reactor;
wherein the first micro-interface generator is fixed inside the first reactor and the second reactor by using wave-proof grids;
wherein both interior tops of the first reactor and the second reactor are provided with filter screens.