Table 13 Independent variables and their levels for D-optimal design of the fatty acids separation
Independent variables | Variable levels | |||
|---|---|---|---|---|
−1 | 0 | +1 | ||
The urea-to-FAs ratio (w/w) (g/g) | X 1 | 1 | 3 | 5 |
Crystallization temperature (°C) | X 2 | −10 | 0 | 10 |
Crystallization time (h) | X 3 | 8 | 16 | 24 |