Table 1. Selectivity Coefficients for Liquid Mixtures of C8 Isomers at 25 °C.
| composition | ratio in liquid | ratio absorbed | selectivity coefficient |
|---|---|---|---|
| TPBD-αI | |||
| PX/MX | 1:1 | 59.7:1.2 | 50.6G |
| 1:1 | 22.1 | 22.1N | |
| 1:4 | 11.6 | 45.9N | |
| 1:9 | 7.3 | 65.8N | |
| 1:19 | 3.7 | 70.3N | |
| 1:49 | No C8 uptake | No C8 uptake | |
| 1:99 | No C8 uptake | No C8 uptake | |
| PX/OX | 1:1 | 49.6:0.9 | 54.1G |
| 1:1 | 76.1 | 76.1N | |
| 1:4 | 27.5 | 108.4N | |
| 1:9 | 10.8 | 105.6N | |
| 1:19 | 5.0 | 97.1N | |
| 1:49 | No C8 uptake | No C8 uptake | |
| 1:99 | No C8 uptake | No C8 uptake | |
| PX/EB | 1:1 | 52.0:1.1 | 47.3G |
| 1:1 | 49.2 | 49.2N | |
| 1:4 | 14.6 | 59.9N | |
| 1:9 | 6.5 | 58.4N | |
| 1:19 | 3.0 | 57.1N | |
| 1:49 | 0.9 | 46.0N | |
| 1:99 | No C8 uptake | No C8 uptake | |
| PX/OX/MX | 1:1:1 | 49.4:0.9:0.84d | 60.4G |
| 66.3:1.0:2.4lh | 39.4N | ||
| 104.2:1.0:2.74d | 56.3N | ||
| PX/OX/MX/EB | 1:1:1:1 | 87.1:1.0:1.1:0.94d | 85.7G |
| 89.6:1.0:3.1:1.54d | 48.5N | ||
| 50.7:1.2:1.9:1.0a | 37.5N | ||
| TPBD-αII | |||
| PX/OX/MX | 1:1:1 | 78.7:1.0:2.61h | 43.7N |
| 82.4:1.0:2.84d | 43.6N | ||
| PX/OX/MX/EB | 1:1:1:1 | 84.6:1.0:2.5:1.84d | 47.9N |
a
Selectivity after 10 cycles in 2 h′ immersion. N = 1H NMR G = GC.