Table 3 Methyldopa solubility in scCO2 + 1 and 3 mol % ethanol.

From: Enhancing methyldopa solubility via green supercritical fluid techniques using ethanol co-solvent

Temperature (K)

Pressure (MPa)

1 mol % ethanol

3 mol % ethanol

Mole fraction (y’2) × 104

Standard Deviation ×104

enhancement factor (e)

Mole fraction (y’2) × 104

Standard Deviation ×104

enhancement factor (e)

308

12

0.766

0.026

3.22

2.259

0.007

9.49

15

0.768

0.027

2.65

2.456

0.009

8.47

18

0.950

0.032

2.47

2.759

0.01

7.17

21

1.038

0.035

2.39

2.964

0.010

6.83

24

1.216

0.041

2.30

3.405

0.013

6.44

27

1.377

0.047

2.21

3.793

0.011

6.08

30

1.423

0.048

1.79

4.677

0.012

5.88

318

12

0.701

0.024

3.91

2.001

0.007

11.18

15

1.065

0.036

3.30

3.044

0.008

9.42

18

1.318

0.045

3.00

3.766

0.010

8.58

21

1.578

0.053

2.74

4.510

0.011

7.82

24

1.687

0.057

2.42

4.819

0.012

6.91

27

1.815

0.061

2.39

5.187

0.016

6.83

30

2.031

0.069

2.35

5.803

0.019

6.72

328

12

0.622

0.021

4.21

1.872

0.005

12.65

15

0.914

0.031

3.35

3.097

0.008

11.35

18

1.536

0.052

3.17

4.387

0.011

9.06

21

2.026

0.069

2.95

5.789

0.014

8.41

24

2.237

0.076

2.88

6.392

0.015

8.22

27

2.434

0.082

2.72

6.953

0.017

7.76

30

2.558

0.087

2.62

7.361

0.019

7.55

338

12

0.405

0.013

5.19

1.225

0.003

15.70

15

0.925

0.031

4.69

2.660

0.009

13.50

18

1.808

0.061

3.46

5.165

0.014

9.88

21

2.204

0.075

3.04

6.298

0.016

8.70

24

2.502

0.085

2.96

7.149

0.019

8.46

27

2.858

0.097

2.91

8.166

0.021

8.32

30

3.143

0.107

2.90

8.979

0.023

8.30

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