Micro/Semi-Micro Distillation, Material Sciences

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Micro/Semi-Micro Distillation

Description

Concentric Tube Columns
This column type can be used to solve every distillation problem under atmospheric or reduced pressure condition. At the same time it is most dedicated for the discontinous distillation of very small quantities of thermally sensitive components with molecular weights from 200 up to 2000, like fatty alcohols higher fatty acids, olfactory products, resins as well as animal and vegetable fats and oils. These products can be separated by distillation without being decomposed by operation under reduced pressures.
The high separation efficiency of the concentric tube column is related to the physical principle of the mass transfer between the vertically rising vapour and the spirally trickling film of liquid in a concentric annular gap made of glass. The column consists of two concentrically melted, calibrated glass tubes and is an all-glass-construction.

Typ/Type                  MRS 255;   HRS 300 C;   HRS 500 C
Operating range of flask (ml) 1-10;   5-200;   10-200;
active column length (mm)      200;   300;    500;
theor. number of plates          40    60    90
load at 1000 mbar in cm³/h   50-400   50-500   80-1000
load at 10 mbar                     3-23   6-50   9-115
load at 1 mbar                      1-9   2-20     5-50
lowest flask pressure (mbar)   0,1   0,01   0,02
working contents (ml)             0,3   0,5   1,0

• low pressure loss
• small hold-up
• temperature sensitive substances
• very high separation efficiency
• distillation of small quantities (down to 1 ml)
• very small working contents

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