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Optimizing Büchi® Rotary Evaporator Applications

class=black width="63%">Evaporation rate of water (g/hr.) 2,260

Heat of vaporization of solvent (j/g) The evaporation of water can be extrapolated from the graphs listed below.

*The evaporation rate of water was determined experimentally. Example:

When using a 20-liter Industrial Rotary Evaporator, what is the best expected evaporation rate for Hexane if the vapor pressure temperature is 40°C and the bath temperature is set to 60°C?

Evaporation rate of solvent = Evaporation rate of water (g/hr.) 2,260

Heat of vaporization of solvent (j/g)
Evaporation rate of water with (? t = 20°C, rpm = 225) = 2.0 L/hr. or 2,000 g/hr.
Heat of vaporization of Hexane = 371 j/g
Density Hexane = .659 g/cm3
Evaporation rate of solvent = 2,000 g/hr. 2,260

371 j/g		 = 12,183 g/hr.
V = '"/>

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