# US 11,896,936 B2 · Poly(imide-oxadiazole) membranes for gas separation applications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,896,936 B2 - Document ID: US11896936B2 - Status: Granted - Kind: B2 - Application number: 17/148,751 - Filed: 2021-01-14 - Published: 2022-07-14 - Granted: 2024-02-13 - Earliest claimed: 2021-01-14 - Assignees: Saudi Arabian Oil Company - Applicants: Saudi Arabian Oil Company - Inventors: Ali Hayek; Abdulkarim Alsamah - Web page: https://patentgrep.com/patent/US11896936B2 ## CPC - B01D 71/64: Polyimides; Polyamide-imides; Polyester-imides; Polyamide acids or similar polyimide precursors - B01D 53/228: {characterised by specific membranes} - B01D 67/0006: {by chemical reactions (in-situ polymerisation, polycondensation, cross-linking or reaction for manufacturing composite membranes B01D69/125)} - B01D 67/0013: {Casting processes} - B01D 71/80: Block polymers - C08G 73/1021: {characterised by the catalyst used} - C08G 73/1067: {Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound} - C08G 73/1085: {Polyimides with diamino moieties or tetracarboxylic segments containing heterocyclic moieties} - B01D 2257/304: Hydrogen sulfide - B01D 2257/504: Carbon dioxide - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS ## Abstract A gas separation membrane is provided. The gas separation membrane includes a poly(imide-oxadiazole) polymer including an oligomer having a structure comprising: In this structure, Ar1, Ar2, and Ar3 include aromatic moieties, and wherein Ar1, Ar2, and Ar3 are each independently selected. ## Claims ### Claim 1 A gas separation membrane comprising a poly(imide-oxadiazole) polymer comprising: a first oligomer having a first structure comprising: wherein Ar1, Ar2, and Ar3 comprise aromatic moieties, and wherein Ar1, Ar2, and Ar3 are each independently selected; and a monomer having a second structure comprising: ### Claim 2 (depends on 1) The gas separation membrane of claim 1, wherein the poly(imide-oxadiazole) polymer comprises a plurality of the first oligomer. ### Claim 3 (depends on 1) The gas separation membrane of claim 1, wherein the poly(imide-oxadiazole) polymer comprises a third structure comprising: wherein Ar4 comprises an aromatic moiety. ### Claim 4 (depends on 3) The gas separation membrane of claim 3, further comprising a random copolymer. ### Claim 5 (depends on 3) The gas separation membrane of claim 3, further comprising a block copolymer. ### Claim 6 (depends on 1) The gas separation membrane of claim 1, wherein the gas separation membrane comprises a copolymer having a third structure comprising: ### Claim 7 (depends on 1) The gas separation membrane of claim 1, wherein the gas separation membrane comprises a copolymer comprising a second oligomer having a third structure comprising: ### Claim 8 (depends on 1) The gas separation membrane of claim 1, wherein the gas separation membrane comprises a copolymer comprising a second oligomer having a third structure comprising: ### Claim 9 (depends on 1) The gas separation membrane of claim 1, wherein the gas separation membrane comprises a copolymer comprising a second oligomer having a third structure comprising: ### Claim 10 (depends on 1) The gas separation membrane of claim 1, wherein the gas separation membrane comprises a copolymer comprising a second oligomer having a third structure comprising: ### Claim 11 (depends on 1) The gas separation membrane of claim 1, wherein the gas separation membrane comprises a copolymer comprising a second oligomer having a third structure comprising: ### Claim 12 (depends on 1) The gas separation membrane of claim 1, wherein the gas separation membrane comprises a copolymer comprising a second oligomer having a third structure comprising: ### Claim 13 (depends on 1) The gas separation membrane of claim 1, wherein the gas separation membrane comprises a second monomer having a third structure comprising: ### Claim 14 (depends on 1) The gas separation membrane of claim 1, wherein the gas separation membrane comprises a second monomer having a third structure comprising: ### Claim 15 (depends on 1) The gas separation membrane of claim 1, wherein the gas separation membrane comprises a second monomer having a third structure comprising: ### Claim 16 (depends on 1) The gas separation membrane of claim 1, wherein the gas separation membrane comprises a second monomer having a third structure comprising: ### Claim 17 (depends on 1) The gas separation membrane of claim 1, wherein the gas separation membrane comprises a second monomer having a third structure comprising: