FAQ onRotary evaporator

Q I want to see solvent collection data of the rotary evaporator.
A Please refer to the following.

*Rotary evaporator solvent collection data*
Development No. 2063 Theme Rotary evaporator
Testing product RE experimental model (C type) Test date August 1, 1999
Inspection method Distillation test Standard -
Test objective To measure distillation capacity of RE experimental model

Testing conditions Solvents Ethanol, chloroform
Solvent amount 300cc Rev. 180rpm
Bath temp. 40°C Coolant Put dry ice into ethanol.
Atmosphere temp. Room temp. (23°C)
Measuring gauge Vacuum gauge Yokogawa digital pressure gauge
T thermocouple (ordinary measuring gauge)
Thermometer T thermocouple (ordinary measuring gauge)
Recording device Chino (Code No.900704)

Test results
No. Reagent Reagent amount Recovery amount Recovery percentage Process time Degree
of
vacuum*		 Trap temp. Older type
Recovery percentage Process time Degree
of
vacuum		 Trap temp.
1 Ethanol 241.4g 232.6g 96.4% 13'38" 12㎜Hg -53.6
to
-13°C		        
2 Ethanol 248.1 240.4
(242.9)		 98.9
(99.9)		 13'12" 10 -72.4
to
-60		        
3 Ethanol 244.5 241.0
(248.9)		 98.6
(99.8)		 13'20" 10 -75.2
to
-65		        
Average
ethanol
amount		     98.0% 13'23" 11㎜Hg   97% 20' 30㎜Hg -21°C
4 Chloroform 451.7 445.3 98.6 5'06" 23 -75.6
to
-61.8		        
5 Chloroform 459.3 455.4 99.2 5'28" 27 -76.9
to
-64		        
6 Chloroform 470.1 465.4 99 5'21" 24 -77.2
to
-64		        
Average
chloroform
amount		     98.9 5'18" 25㎜Hg   99% 16' 35㎜Hg -43°C

Note:
*The degree of the vacuum is just before completion of distillation.  Values in parenthesis indicate amounts where the amount recovered in a flask is added.

Judgement
Which is superior to the other can not be determined, since conditions are different from those for older types.


Development No 2063 Theme Rotary evaporator
Testing product RE experimental model (B type) Test date July 19, 1999
Inspection method Distillation test Standard -
Test objective To measure distillation capacity of RE experimental model

Testing conditions Solvents Water, benzene, ethanol, chloroform          
Solvent amount 300cc Rev. 180rpm
Bath temp. 40°C, 30°C（only for chloroform） Coolant temp 4°C(set at CF600) 4°C（set at CF600）
Atmosphere temp. Room temp.
Measuring gauge Vacuum gauge Yokogawa digital pressure gauge
MT120,MODEL 265212,No.25DU4006
Thermometer Ordinary measuring gauge (Temperature of 30°C is
 confirmed using a standard thermometer.)

Test results
No. Reagent Reagent amount Recovery amount Recovery percentage Process time Degree
of
vacuum*		 Older type
Recovery
percentage		 Process
time		 Degree
of
vacuum
1 Water 296.4g 292.3g 98.6% 56.5' 21.7mmHg      
2 Water 296.3 295.4 99.7 50.5 18.6      
3 Water 296.5 295.6 99.7 49.5 19.8      
Average
water
amount		     99.3% 13'23" 20.0mmHg 100% 86' 18㎜Hg
4 Benzene 261.5 240.2 91.9 8.5 58.0      
5 Benzene 263.4 242.9 92.2 8.8 58.1      
Average
benzene
amount		     92.1% 8.7' 58.1mm3Hg 98% 14' 95㎜Hg
6 Ethanol 241.8 239.4 99.0 19.5 34.1      
7 Ethanol 243.2 235.4 96.8 19.0 30.6      
Average
ethanol
amount		     97.9% 19.8' 32.4mm3Hg 97% 16' 27㎜Hg
8 Chloroform 438.8 393.9 89.8 10.5 105.3      
9 Chloroform 441.0 398.5 90.4 10.5 97.0      
Average
chloroform
amount		     90.1% 10.5' 101.2mmHg 98% 16' 180㎜Hg

Note:
*The degree of vacuum is just before completion of distillation.  Values in parenthesis indicate amounts where the amount recovered in a flask is added.

Judgement
Which is superior to the other can not be determined, since conditions without vacuum status for older types are not clear.

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