The special advantages of the concentric-tube-column are:
• extremely low pressure drop
• highest separation efficiency
• minimum hold-up
• all-glass construction
• static design (no rotating parts inside the column)
The separation efficiency in the concentric-tube-column is based on the physical principle of the mass transfer between 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-in, especially selected and calibrated glass tubes.