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Experimental design for response surface analysis of acetylation.
| Number | Dosage of acetic anhydride (mL) | Temperature (°C) | Reaction time (h) | Degree of substitution |
|---|---|---|---|---|
| A | B | C | ||
| 1 | 5 | 60 | 5 | 0.264 |
| 2 | 7.5 | 60 | 4 | 0.415 |
| 3 | 10 | 60 | 5 | 0.302 |
| 4 | 7.5 | 50 | 5 | 0.263 |
| 5 | 0 | 70 | 5 | 0.326 |
| 6 | 10 | 50 | 4 | 0.326 |
| 7 | 10 | 70 | 4 | 0.365 |
| 8 | 5 | 60 | 3 | 0.257 |
| 9 | 5 | 50 | 4 | 0.249 |
| 10 | 7.5 | 50 | 4 | 0.416 |
| 11 | 7.5 | 50 | 4 | 0.427 |
| 12 | 10 | 50 | 3 | 0.348 |
| 13 | 7.5 | 50 | 4 | 0.426 |
| 14 | 7.5 | 70 | 3 | 0.332 |
| 15 | 7.5 | 50 | 3 | 0.278 |
| 16 | 7.5 | 60 | 4 | 0.415 |
| 17 | 5 | 70 | 4 | 0.352 |
