Table 1.
Comparative between depolymerization procedures found in the literature and other present work.
| Reference | Method | Time (h) |
Temperature (°C) |
Pressure (at) |
Catalyst | Ratio PET:EG | Yield (%) |
|---|---|---|---|---|---|---|---|
| [16] | Glycolysis in xylene |
1–3 | 170–245 | - | - | 1:0.5–1:3 Molar ratio |
20 |
| [18] | Glycolysis by microwave irradiation |
0.5 | 180–190 | - | ZnAc 0.5 % | 1:2,1:4, 1:6 Molar ratio |
40 |
| [19] | Ionic liquids as reaction medium |
5–10 | 160–195 | 1 | Ionic liquids 1–4 L |
1:4 (w/w) |
Max Yield 78 Conversion 70 |
| [20] | Glycolysis in a pressure reactor | 235–275 | High pressure | ZnAc | 1:1.3 (w/w) |
- | |
| [21] | Autoclave reactor |
1 | 260 | 5 | ZnMn2O4 1 % | 5:86 Molar ratio |
92.2 |
| [22] | Glycolysis at atmospheric pressure |
1–2 | 196 | 1 | ZnAc 1 % Or Na2CO3 1% |
1:7.6 Molar ratio |
70 |
| [23] | Glycolysis in potassium nitrate bath |
8 | 190 | - | Metal acetate | 1:4 Molar ratio |
- |
| [24] | Glycolysis at atmospheric pressure |
1–4 | 180–190 | 1 | ZnAc 2.35 % | 1:4 (w/w) |
91.6 |
| [25] | Glycolysis under pressure |
0.5–3 | 190–240 | 1–6.12 | - | 1:1–1:4 Molar ratio |
- |
| [26] | Glycolysis at atmospheric pressure |
2–10 | 190 | 1 | ZnAc 0.25–0.75 % | 1:4 Molar ratio |
- |
| Our work | Glycolysis under pressure |
10–180 | 220 | 3 bar | ZnAc 1 % | 1:3 (w/w) |
55–71 |