US 12,280,359 B2
Integrated filter material and preparation method and application thereof
Haitao Xu, Nanjing (CN); Xiaohuan Zhi, Nanjing (CN); Chaoqiang Mei, Nanjing (CN); Mingbo Li, Nanjing (CN); and Jing Song, Nanjing (CN)
Assigned to 1. NANJING TECH UNIVERSITY, Nanjing (CN); and NANJING GEKOF INSTITUTE OF ENVIRONMENTAL PROTECTION TECHNOLOGY & EQUIPMENT CO., LTD, Nanjing (CN)
Appl. No. 17/773,427
Filed by NANJING TECH UNIVERSITY, Jiangsu (CN); and NANJING GEKOF INSTITUTE OF ENVIRONMENTAL PROTECTION TECHNOLOGY & EQUIPMENT CO., LTD., Jiangsu (CN)
PCT Filed May 10, 2020, PCT No. PCT/CN2020/089514
§ 371(c)(1), (2) Date Apr. 29, 2022,
PCT Pub. No. WO2021/093286, PCT Pub. Date May 20, 2021.
Claims priority of application No. 201911098272.9 (CN), filed on Nov. 12, 2019.
Prior Publication US 2022/0362746 A1, Nov. 17, 2022
Int. Cl. B01J 23/34 (2006.01); B01D 39/16 (2006.01); B01D 46/00 (2022.01); B01D 46/02 (2006.01); B01D 53/86 (2006.01); B01J 31/06 (2006.01); B01J 31/36 (2006.01); B01J 37/02 (2006.01)
CPC B01J 23/34 (2013.01) [B01D 39/1623 (2013.01); B01D 46/0001 (2013.01); B01D 46/02 (2013.01); B01D 53/8628 (2013.01); B01D 53/8662 (2013.01); B01D 53/8668 (2013.01); B01J 31/061 (2013.01); B01J 31/36 (2013.01); B01J 37/0219 (2013.01); B01J 37/0228 (2013.01); B01J 37/0236 (2013.01); B01D 2239/0478 (2013.01); B01D 2239/10 (2013.01); B01D 2255/2065 (2013.01); B01D 2255/20723 (2013.01); B01D 2255/2073 (2013.01); B01D 2255/915 (2013.01); B01D 2257/404 (2013.01); B01D 2257/70 (2013.01); B01D 2258/0291 (2013.01); B01D 2273/20 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A preparation method of an integrated filter material, comprising the following steps:
a. cutting a filter material a into a disc, immersing the disc in an aqueous solution of a surface dispersant, stirring for 1 h to 2 h, and then drying at 100° C. to 120° C. for 4 h to 6 h to obtain a surface dispersant-modified filter material b;
b. adding distilled water dropwise to the filter material b slowly until the filter material has been fully infiltrated, to determine a saturated water absorption amount of the filter material;
c. calculating a concentration of an aqueous solution of a catalyst precursor according to a required load and the saturated water absorption amount of the filter material, wherein the calculation method is as follows:
(1) calculating a number of moles of each metal component in the catalyst required for an area filter material when the load requirement is met, and calculating the mass of a required metal precursor according to the number of moles of each component; and
(2) concentration of aqueous solution of each component in catalyst precursor=mass of each component of metal precursor/saturated water absorption amount of filter material;
immersing the filter material b obtained in step a in the aqueous solution of the catalyst precursor and taking out the filter material b after thorough stirring for 4 h to 6 h according to the foregoing calculation; further immersing the taken-out filter material in an aqueous solution of oxalic acid and standing for 10 h to 12 h; and then drying to obtain a filter material c;
d. adding acetone dropwise to the filter material c until the filter material has been fully infiltrated, to determine a saturated acetone absorption amount of the filter material;
e. determining a concentration of an acetone solution of vanadium oxytrichloride according to the saturated acetone absorption amount of the filter material c and the required load, wherein the calculation method is as follows: concentration of acetone solution of vanadium oxytrichloride=the number of moles of required V2O5* relative molecular mass of vanadium oxytrichloride/saturated acetone absorption amount of filter material;
immersing the filter material c obtained in step c in the acetone solution of vanadium oxytrichloride and taking out after standing for 4 to 6 h; and soaking the filter material c in an aqueous solution of sodium hydroxide with a pH value of 7.5 to 8.5, standing for 4 h to 6 h, and drying at 105° C. to 115° C. for 10 h to 12 h to obtain a filter material d; and
f. placing the filter material d in a reactor, pouring absolute ethanol, reacting in a vacuum drying oven at 180° C. to 220° C. for 10 h to 14 h, taking out the filter material after the reactor is cooled, drying at 60° C. to 80° C. for 4 h to 6 h, and then finishing preparation.