Solvent data, 3 solvent data – Heidolph Hei-VAP Advantage User 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