US 11,752,488 B2
Adsorbent comprising carboxylic acid dimer and preparation method thereof
Weiming Zhang, Nanjing (CN); Chenghan Ji, Nanjing (CN); Bingcai Pan, Nanjing (CN); Ming Hua, Nanjing (CN); and Lu Lyu, Nanjing (CN)
Assigned to NANJING UNIVERSITY, Nanjing (CN)
Filed by Nanjing University, Nanjing (CN)
Filed on May 21, 2021, as Appl. No. 17/326,378.
Claims priority of application No. 202011587940.7 (CN), filed on Dec. 29, 2020.
Prior Publication US 2022/0203327 A1, Jun. 30, 2022
Int. Cl. B01J 20/24 (2006.01); B01J 20/10 (2006.01); B01J 20/18 (2006.01); B01J 20/20 (2006.01); B01J 20/22 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); B01J 20/32 (2006.01); C02F 1/28 (2023.01); C02F 101/20 (2006.01); C02F 101/22 (2006.01)
CPC B01J 20/24 (2013.01) [B01J 20/103 (2013.01); B01J 20/18 (2013.01); B01J 20/20 (2013.01); B01J 20/226 (2013.01); B01J 20/2808 (2013.01); B01J 20/28059 (2013.01); B01J 20/28061 (2013.01); B01J 20/28066 (2013.01); B01J 20/28083 (2013.01); B01J 20/3085 (2013.01); B01J 20/3204 (2013.01); B01J 20/3208 (2013.01); C02F 1/285 (2013.01); C02F 1/288 (2013.01); C02F 2101/203 (2013.01); C02F 2101/206 (2013.01); C02F 2101/22 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An adsorbent, comprising a porous substrate and a carboxylic acid dimer; the porous substrate comprising a surface and a plurality of holes, and the carboxylic acid dimer being loaded onto the surface or in the plurality of holes of the porous substrate;
wherein:
an average pore size of the porous substrate is not smaller than 2 nm;
the carboxylic acid dimer is loaded onto the porous substrate by at least one of the following manners:
a) the carboxylic acid dimer is loaded onto the porous substrate through a Si—OH bond;
b) the carboxylic acid dimer is loaded onto the porous substrate through the exchange between a carboxyl group and chlorine;
c) the carboxylic acid dimer is loaded onto the porous substrate through the exchange between a carboxyl group and a hydroxyl group; and
d) the carboxylic acid dimer is loaded onto the porous substrate through the coordination of a carboxyl group and aluminum or silicon.