Table 3. Decreased Catalyst Ru-63 Loading Experimentsa.
| catalyst Ru-63 loading (ppm) | conversion (%)b,c | selectivity (%)b,d | TONb,e |
|---|---|---|---|
| 200 | 73 (72) | 97 (97) | 3125 |
| 100 | 54 (57) | 97 (98) | 4550 |
| 50 | 36 (38) | 98 (98) | 5200 |
| 25 | 17 (19) | 99 (98) | 5400 |
a
Reaction conditions: ethylene pressure 20 bar; ethylene purity 99.9% (3.0 grade); reaction temperature 50 °C; time 3 h (in parenthesis time 6 h).
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)].
e
TON = yield × (initial moles of 1/moles of the catalyst)/100; TONs are calculated for the time of 3 h.