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Beilstein J. Org. Chem. 2010, 6, 789–800, doi:10.3762/bjoc.6.86
Graphical Abstract
Figure 1: Membrane based separation process.
Figure 2: Chemical structure of the 6FDA (= 4,4′-hexafluoroisopropylidene diphthalic anhydride).
Figure 3: Plasticization phenomenon and resulting effects on separation characteristics.
Figure 4: Synthesis of cross-linkable copolyimide structures.
Figure 5: Investigated cross-linking variations (non cross-linked, covalently and ionically cross-linked).
Figure 6: Hybrid process for the separation of propylene/propane.
Figure 7: Total permeability (left) and selectivity (right) for the 6FDA-4MPD (●) and the 6FDA-4MPD/6FDA-DABA...
Figure 8: Conventional separation process for reformates containing extraction and stripping unit.
Figure 9: Hybrid process for the separation of aromatics/aliphatics.
Figure 10: Pervaporation results for the 6FDA-6FpDA/6FDA-4MPD/6FDA-DABA 3:1:1 copolyimide cross-linked with et...
Figure 11: Pervaporation results for 6FDA-4MPD/6FDA-DABA 4:1 copolyimide (non cross-linked) conditioned in pur...
Figure 12: Pervaporation results for conditioned 6FDA-4MPD/6FDA-DABA 4:1 copolyimide membranes, 100% cross-lin...
Figure 13: Hybrid process for the removal of CO2 in tertiary oil production processes.
Figure 14: Pure CO2 permeabilities at 35 °C for the 6FDA-4MPD (■), the 6FDA-4MPD/6FDA-DABA 4:1 copolyimide ion...
Figure 15: CO2/CH4 separation characteristics for the 6FDA-4MPD/6FDA-DABA 4:1 copolyimide ionically cross-link...