Buchi Rotavapor R-220 - Tips and Tricks; Selection of the Distillation Temperature; How Do You Attain These Conditions?; Advantages of a Bath Temperature of 60 °C

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2OTAVAPOR R-220
/PERATION
Adjusting the Optional Automatic Lowering of the
Bath in Case of a Power Interruption
s 0RESSTHEBUTTONh,)&4DOWNv햳SIMULTANEOUSLYSWITCHING
ONTHEMAINBREAKERSWITCH햲
4HISRESULTSINTHEDISPLAYh/.vORh/&&v
/N4HELIFTLOWERINGHASBEENSWITCHED/.
/FF4HELIFTLOWERINGHASNOTBEENSWITCHED/.
s 4OSWITCHBACKANDFORTHBETWEEN/.AND/&& PRESS
REPEATEDLYONTHEBUTTONh,)&4DOWNv햳
s 4HEINPUTISSTOREDANDTHEUNITSWITCHEDINTOTHEOPERATING
MODEONLYAFTERTHEh!%2!4%vBUTTON햽ISTHENPRESSED
REPEATEDLY
5.3 Tips and Tricks
Selection of the Distillation Temperature
)NORDERTOATTAINOPTIMUMDISTILLATIONCONDITIONSTHEENERGY
SUPPLIEDTOTHEDISTILLATIONFROMTHEBATHMUSTBEDISSIPATED
AGAINACROSSTHECOOLER)NORDERTOENSURETHISITISBESTTO
WORKACCORDINGTOTHEFOLLOWINGRULEOFTHUMB
#OOLINGWATER Δ4 "OILINGTEMPERATURE Δ4 "ATH
MAX# # #
How do you attain these conditions?
s 3ETTHEBATHTEMPERATUREAT#
s !DJUSTTHECOOLINGWATER)TSTEMPERATURESHOULDNOTBE
HIGHERTHAN#
s !LLOWTHECOOLINGWATERTOFLOWTHROUGHTHECOOLERATARATE
OFABOUTnLITERSHR
s 3ELECTTHEWORKINGVACUUMSOTHATTHEBOILINGPOINTOFTHE
SOLVENTISAT#
s /BTAINTHECORRESPONDINGVALUEFORTHEVACUUMFROMTHE
4ABLEOFSOLVENTS
Advantages of a Bath Temperature of 60 °C
s %VAPORATINGFLASKSCANBECHANGEDWITHOUTANYDANGEROF
SCALDING
s 4HERATEOFWATEREVAPORATIONOUTOFTHEHEATINGBATHIS
NOTYETVERYHIGH
s 4HEENERGYINTHEHEATINGBATHISBEINGUTILIZEDVERYEFFICIENTLY
4HESOLVENTSHOULDCONDENSEOUTINAPPROXTOOFTHE
LENGTHSOFTHECOOLINGCOILSPRESENT