旋轉真空減壓濃縮機原理和功能(Rotary Evaporators)
真空濃縮是利用減壓(真空)使得溶劑的沸點降低，將溶液加熱到該沸點時，溶劑氣化後經由冷凝器收集，可將原來溶液中的溶劑量降低達到濃縮的目的。
例：水在標準狀況( 一大氣壓，攝氏25℃ 100℃
真空減壓濃縮和減壓濃縮一樣，就字面上解釋，真空減壓與減壓是一樣的 ( 真空度即是指小於1大氣壓=760m
Solvent
|
Formula
|
Molar Massin g/mol
|
Evaporationenergy in j/g
|
Boiling pointat 1013 mbar
|
Densityin g/cm
|
Vacuum in mbar for
boilingpoint at
|
|
Acetone
|
C3H6O
|
58.1
|
553
|
56
|
0.79
|
556
|
|
n-amylalcohol. tert. Butanol
|
C5H12O
|
88.1
|
595
|
37
|
0.814
|
11
|
|
Bznzene
|
C6H6O
|
78.1
|
548
|
80
|
0.877
|
236
|
|
n-butanol. tert. butanol
|
C4H10O
|
74.1
|
620
|
118
|
0.81
|
25
|
|
(2-methyl-2-propanol)
|
C4H10O
|
74.1
|
590
|
82
|
0.789
|
130
|
|
Chlorobenzene
|
C6H5Cl
|
112.6
|
377
|
132
|
1.106
|
36
|
|
Chloroform
|
C6HCl3
|
119.4
|
264
|
62
|
1.483
|
474
|
|
Cyclohexane
|
C6H12
|
84
|
389
|
81
|
0.779
|
235
|
|
Diethylether
|
C4H10O
|
74
|
389
|
35
|
0.714
|
Atmospheric
|
|
1.2-dichloroethylene
|
C2H4Cl12
|
99
|
335
|
84
|
1.235
|
210
|
|
1.2-dichloroethylene(cis)
|
C2H2Cl12
|
97
|
322
|
60
|
1.284
|
479
|
|
1.2-dichloroethylene(trans)
|
C2H2Cl12
|
97
|
314
|
48
|
1.257
|
751
|
|
diisopropyl ether
|
C6H14O
|
102
|
318
|
68
|
0.724
|
375
|
|
Dioxane
|
C4H8O2
|
88.1
|
406
|
101
|
1.034
|
107
|
|
DMF(dimethyl-formamide)
|
C3H7NO
|
73.1
|
153
|
0.949
|
11
|
||
Acetic acid
|
C2H4O2
|
60
|
695
|
118
|
1.049
|
44
|
|
Ethanol
|
C2H6O
|
46
|
879
|
79
|
0.789
|
175
|
|
Ethylacetate
|
C4H8O2
|
88.1
|
394
|
77
|
0.9
|
240
|
|
Heptene
|
C7H16
|
100.2
|
373
|
98
|
0.684
|
120
|
|
Hexane
|
C6H14
|
86.2
|
368
|
69
|
0.66
|
335
|
|
Isopropylalcohol
|
C3H8O
|
60.1
|
699
|
82
|
0.786
|
137
|
|
3-methyl-1-butanol
|
C5H12O
|
88.1
|
595
|
129
|
0.809
|
14
|
|
Methylethylketone
|
C4H8O
|
72.1
|
473
|
80
|
0.805
|
243
|
|
Methanol
|
CH4O
|
32
|
1227
|
65
|
0.791
|
337
|
|
Methylene chloride.dichloromethane
|
CH2Cl2
|
84.9
|
373
|
40
|
1.327
|
Atmospheric
|
|
Pentane
|
C5H12
|
72.1
|
381
|
36
|
0.626
|
Atmospheric
|
|
n-propylalcohol
|
C3H8O
|
60.1
|
787
|
97
|
0.804
|
67
|
|
Pentachloroethane
|
C2H Cl15
|
202.3
|
201
|
162
|
1.68
|
13
|
|
C2H2Cl14
|
167.9
|
247
|
146
|
1.595
|
35
|
||
Tetrachloroethane
|
CCl14
|
153.8
|
226
|
77
|
1.594
|
271
|
|
C2H3Cl13
|
133.4
|
251
|
74
|
1.339
|
300
|
||
tetre-chloro-ethane
|
C2Cl14
|
165.8
|
234
|
121
|
1.623
|
53
|
|
THF(tetrahydrofurane)
|
C4H8O
|
72.1
|
67
|
0.889
|
357
|
||
Toluene
|
C7H8
|
92.2
|
427
|
111
|
0.867
|
77
|
|
Trchloroethylene
|
C2HCl13
|
131.3
|
264
|
87
|
1.464
|
183
|
|
Water
|
H2O
|
18
|
2261
|
100
|
1
|
72
|
|
Xylene(mixture)
|
C8H10
|
106.2
|
389
|
25
|
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