Table 2 Conditions and constants of four organic acids during the acidolysis
Temperature (℃)/time (min) | Acid type | pHa | CS |
|---|---|---|---|
130/20 | Formic acid | 1.63 | 0.55 |
Glycolic acid | 1.64 | 0.54 | |
Lactic acid | 1.82 | 0.36 | |
Acetic acid | 2.12 | 0.06 | |
130/45 | Formic acid | 1.51 | 1.03 |
Glycolic acid | 1.56 | 0.98 | |
Lactic acid | 1.75 | 0.79 | |
Acetic acid | 2.04 | 0.5 | |
130/75 | Formic acid | 1.36 | 1.4 |
Glycolic acid | 1.41 | 1.35 | |
Lactic acid | 1.54 | 1.22 | |
Acetic acid | 1.89 | 0.87 | |
150/20 | Formic acid | 1.45 | 0.38 |
Glycolic acid | 1.51 | 0.32 | |
Lactic acid | 1.70 | 0.13 | |
Acetic acid | 1.98 | − 0.15 | |
150/45 | Formic acid | 1.32 | 0.86 |
Glycolic acid | 1.42 | 0.76 | |
Lactic acid | 1.58 | 0.6 | |
Acetic acid | 1.87 | 0.31 | |
150/75 | Formic acid | 1.12 | 1.29 |
Glycolic acid | 1.24 | 1.17 | |
Lactic acid | 1.31 | 1.1 | |
Acetic acid | 1.61 | 0.8 | |
170/20 | Formic acid | 1.26 | 0.72 |
Glycolic acid | 1.35 | 0.63 | |
Lactic acid | 1.58 | 0.4 | |
Acetic acid | 1.73 | 0.25 | |
170/45 | Formic acid | 1.12 | 1.20 |
Glycolic acid | 1.24 | 1.08 | |
Lactic acid | 1.40 | 0.92 | |
Acetic acid | 1.61 | 0.71 | |
170/75 | Formic acid | 0.98 | 1.57 |
Glycolic acid | 1.11 | 1.44 | |
Lactic acid | 1.17 | 1.38 | |
Acetic acid | 1.45 | 1.10 |