US 12,109,540 B1
Multifunctional diselenide-based polyimide membrane for gas separation and purification
Tarek Ahmed Yousef, Riyadh (SA); and Saad Shaaban, Riyadh (SA)
Assigned to IMAM MOHAMMAD IBN SAUD ISLAMIC UNIVERSITY, Riyadh (SA)
Filed by IMAM MOHAMMAD IBN SAUD ISLAMIC UNIVERSITY, Riyadh (SA)
Filed on May 8, 2024, as Appl. No. 18/657,831.
Int. Cl. B01D 53/22 (2006.01); B01D 67/00 (2006.01); B01D 71/64 (2006.01); C08G 73/10 (2006.01); C08J 5/18 (2006.01)
CPC B01D 71/64 (2013.01) [B01D 53/228 (2013.01); B01D 67/0011 (2013.01); B01D 67/0013 (2013.01); C08G 73/1085 (2013.01); C08J 5/18 (2013.01); B01D 2053/221 (2013.01); C08J 2379/08 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A polyimide, comprising:
reacted units of a 4,4′-diselanediyldianiline; and
reacted units of an ethylenediaminetetraacetic dianhydride,
wherein the reacted units of the 4,4′-diselanediyldianiline are bonded to the reacted units of the ethylenediaminetetraacetic dianhydride through one or more imides in an alternating pattern.