Instruction Manual

Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check
carefully the validity of this document with respect to his product. Manual-no.: 999084 / 05/10/2009
page 34 of 46
How to determine the best distillation conditions
Determine the temperature of the available coolant.
☞ In most cases the coolant temperature is given (e. g. tap water, in house cooling water circuit). For
maximum solvent recovery, carefully choose the boiling point of the product (by choosing the vacuum
level) and the bath temperature accordingly.
☞ Determine the lowest boiling point of the product (solvent).
☞ The temperature difference between boiling point of the product and the coolant should be more than
20°C, otherwise low vacuum level will lead to significant loss of solvent.
☞ Select a water bath temperature of 20-30°C above the boiling point of the product to provide sufficient
heat transfer.
Determine the bath temperature
☞ If there is no limitation from the product side, a water bath temperature of 60-70°C is usually recom-
mended (efficient heating with minimum generation of water vapour from the bath).
Example:
☞ The cooling temperature assumed to be 15-20°C.
☞ Water bath temperature between 60-70°C. Wait until temperature is reached.
☞ Determine the vacuum level for a boiling point (use published data of solvents). Reduce pressure until
a sufficient level of evaporation is attained.
☞ If hysteresis is set manually, avoid frequent operation of the isolation valve (approx. not more than two
operations per minute).
List of solvents
tnevloS tniopgnilioB
3101ta)C°(
rabm
rofmuucaV
tniopgniliob
).sba()rabm(
Tta
s
C°04=
tnevloS tniopgnilioB
3101ta)C°(
rabm
rofmuucaV
tniopgniliob
).sba()rabm(
Tta
s
C°04=
enotecA65655 etatecalyhtE77042
elirtinotecA28032 -enelyhtE
edirolhcid
38012
enezneB08632 enaxeH96533
lonatuB-t28031 lonahteM46733
lonatuB-181152 enatneP630001>
mroforolhC26474 lonaporposI28731
enaxeholcyC18532 enidiryP51106
enahtemorolhciD040001 -orolhcarteT
enahtem
77172
rehtelyhteiD530001> enarufordyharteT66753
rehtelyporposiiD86573 eneuloT11177
edimamroflyhtemiD35111 enelyhteorolhcirT78381
enaxoiD-4,1101701 enelyX83152
lonahtE87571 retaW00127