Heidolph Hei-VAP Advantage - Manual (Page 79)

Appendix
Hei-VAP Value, Hei-VAP Advantage
71
EN
12.3 Solvent data
The graph shows the relationship between the pressure and boiling temperature of a selection of solvents.
The temperature difference between the vapor temperature and the cooling medium
should be at 20 K to result in sufficient condensation.
The temperature difference between the heating bath and vapor temperature should be at
20 K to result in a sufficient Distillation rate (dT).
i.e.: Set a vacuum for a boiling point at 40 °C, set the heating bath temperature at 60 °C.
Figure 12 –1: Graph
Torr to mbar conversion: [mmHg] ≈ 3/4 [mbar]
Solvent data
Solvents Total
formula MW
[g/mol] Boiling
point
[°C] Δhvap
[J/g] Vacuum for a
boiling point at
40 °C
[mbar] [mm(Hg)]
Acetone C
3
H
6
O 58,08 56,5 550 556 387
Acetonitrile C
2
H
3
N 41,05 81,8 833 230 173
Benzene C
6
H
6
78,11 80,1 549 236 177
n-butanol (butyl alcohol) C
4
H
10
O 74,12 117,5 619 25 19
tert.-butanol (tert-butyl alcohol) C
4
H
10
O 74,12 82,9 588 130 98
2-Butanone (methyl ethyl ketone) C
4
H
8
O 72,11 79,6 473 243 182
Chlorobenzene C
6
H
5
CI 112,60 132,2 375 36 27
Cyclohexane C
6
H
12
84,16 80,7 389 235 176
1.2 Dichloroethane C
2
H
4
CI
2
98,96 82,4 336 210 158