US 12,134,068 B2
High free volume membrane for gas separation
Junyan Yang, Acton, MA (US)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on May 15, 2023, as Appl. No. 18/317,652.
Application 18/317,652 is a division of application No. 17/140,395, filed on Jan. 4, 2021, granted, now 11,717,787.
Prior Publication US 2023/0277980 A1, Sep. 7, 2023
Int. Cl. B01D 53/22 (2006.01); B01D 67/00 (2006.01); B01D 69/02 (2006.01); B01D 71/16 (2006.01); B01D 71/18 (2006.01); B01D 71/62 (2006.01); C10L 3/10 (2006.01)
CPC B01D 53/228 (2013.01) [B01D 67/00113 (2022.08); B01D 67/0083 (2013.01); B01D 67/0093 (2013.01); B01D 69/02 (2013.01); B01D 71/16 (2013.01); B01D 71/18 (2013.01); B01D 71/62 (2013.01); C10L 3/104 (2013.01); B01D 2325/023 (2013.01); C10L 2290/548 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for forming a gas separation membrane, comprising:
forming a cellulosic polymer solution;
forming a polymer of intrinsic microporosity (PIM) solution;
blending the polymer solution of the cellulosic polymer with the polymer solution of the PIM to form a mixed polymer solution;
forming a dense film from the mixed polymer solution;
drying the dense film; and
heat-treating the dense film under heat and vacuum to couple the PIM chains.