US 12,070,733 B2
Modified carbon adsorbents
Reena Srivastava, Franklin, MA (US); Baoquan Xie, Hopkinton, MA (US); Frank V. Belanger, Webster, MA (US); and Rocky D. Gipson, Arroyo Grande, CA (US)
Assigned to ENTEGRIS, INC., Billerica, MA (US)
Filed by ENTEGRIS, INC., Billerica, MA (US)
Filed on Nov. 10, 2021, as Appl. No. 17/522,970.
Claims priority of provisional application 63/115,391, filed on Nov. 18, 2020.
Prior Publication US 2022/0152579 A1, May 19, 2022
Int. Cl. B01J 20/20 (2006.01); B01D 53/02 (2006.01); B01J 20/28 (2006.01); B01J 20/282 (2006.01); B01J 20/30 (2006.01)
CPC B01J 20/20 (2013.01) [B01D 53/02 (2013.01); B01J 20/28064 (2013.01); B01J 20/28066 (2013.01); B01J 20/282 (2013.01); B01J 20/3071 (2013.01); B01J 20/3085 (2013.01); B01D 2253/102 (2013.01); B01D 2253/306 (2013.01); B01D 2253/308 (2013.01); B01D 2257/70 (2013.01); B01D 2258/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An adsorbent comprising an activated carbonaceous material, wherein said material comprises:
(i) micropores, said micropores comprising primary micropores and secondary micropores, wherein a pore width of the primary micropores is greater than 0 nm but less than 0.8 nm, and wherein the pore width of the secondary micropores is greater than or equal to 0.8 nm and less than 2 nm,
(ii) mesopores, and
(iii) macropores, wherein the material possesses a surface area ratio of micropores to mesopores measured using t-plot method of greater than or equal to about 13 to less than or equal to about 17, and wherein said material has been treated with a solution of an acid having a pKa from about 1 to about 5 at a concentration of about 0.05 M to 1.0 M and washed with water.