Table 6.
Different reaction conditions for the production of polyglycerols.
| S. No. |
Reactants | Catalyst (amount) | Optimal reaction condition(s) | Product(s) | Reference |
|---|---|---|---|---|---|
| 1. | Crude glycerol | No catalyst | 250 ◦C, 60 min | Polyglycerol(di-, tri-, tetra-, penta-) | [46] |
| 2. | Glycerol | MgAl mixed oxides | 220 ◦C, 24 hour, pH-7.7 | Diglycerol, Triglycerol | [70] |
| 3. | Glycerol | LiOH (2 wt.%) | 240 ◦C, 6 hour | Di-, tri-, Tetraglycerol | [71] |
| 4. | Glycerol | mesoporous catalyst- MCM-41 type (2 wt.%) | 260 ◦C | Diglycerol, Triglycerol | [72] |
| 5. | Glycerol | MCM-41 type mesoporous catalysts (2 wt.%) | 260 ◦C | Di-, tri-, Tetraglycerol | [73] |