Table 2. Optimization of Ethenolysis Conditionsa.
| conditions time (h)/temp. (°C)/pressure (bar) | Ru-24 conversion (%) (selectivity (%))b−d | Ru-59 conversion (%) (selectivity (%))b−d | Ru-63 conversion (%) (selectivity (%))b−d |
|---|---|---|---|
| 3/30/10 | 51 (38) | 52 (78) | 58 (91) |
| 3/50/10 | 58 (45) | 63 (84) | 50 (90) |
| 3/80/10 | 65 (43) | 60 (73) | 45 (89) |
| 1/50/10 | 34 (14) | 50 (22) | 49 (91) |
| 6/50/10 | 68 (49) | 62 (78) | 66 (89) |
| 3/50/2 | 63 (26) | 51 (54) | 31 (75) |
| 3/50/20 | 77 (68) | 54 (87) | 71 (93) |
a
Catalyst loading 200 ppm; ethylene purity 99.9% (3.0 grade); time (h)/temperature (°C)/pressure (bar).
b
Determined by GC using tetradecane as the internal standard with calibration curves (for ethyl oleate, tetradecane, and all the metathesis products 1b, 3, 4b, 5).
c
Conversion = 100 – 100 × (final moles of 2b/initial moles of 2b.
d
Selectivity = 100 × (moles of 1b + moles of 3)/[(moles of 1b + moles of 3) + 2 × (moles of 4b + moles of 5)].