Packed extraction columns (ECP)

High throughput, high efficiency for state-of-the-art extraction

The key benefit of the packed column for liquid-liquid extraction is the high throughput, which results in small column diameters. Together with specially adapted liquid distributors, our structured packing ensures optimum performance.

Liquid-liquid extraction packing
Main benefits
  • High specific throughput facilitation
    • Small column diameters
    • Revamp of existing columns to increase capacity
  • Use in cases of difficult physical properties
    • Low density difference < 50 kg/m3
    • Low interfacial tension: < 2 mN/m
    • Tendency to form emulsions
  • Reliable scale-up
Main applications

In every segment of the process industry

  • Bulk chemical industry
  • Petroleum industry
  • Fine chemical industry
  • Pharmaceutical industry
  • Biotech industry
  • Food industry
  • Hydrometallurgy
  • Purification of organic acids
  • Wet purification of phosphoric acid
  • Solvent recovery
  • Extraction of aromatics
Extraction packing

Extraction packing

The ECP packed column is based on current state-of-the-art extraction research. The column consists of a packed bed, distributors for the two liquid phases and, optionally, a pulsator.

The special Sulzer extraction packing reduces the back-mixing of the continuous phase, thereby providing nearly plug flow conditions and a narrow droplet size distribution. These ensure the high throughput and high efficiency of your process. To further increase the separation performance, additional dual flow perforated plates can be inserted between the packing elements.

Liquid distributors

Liquid distributors

In order to create an even liquid flow velocity profile at either end of the packed bed, both liquid phases are distributed over the whole cross sectional area, by suitable distributors. The design of the dispersed phase distributor requires special attention in order to achieve a narrow drop size distribution.

When operated without external energy input (unpulsed), the packed extraction column is a static apparatus without any moving parts.

Key characteristics

Key characteristics

  • Standard turndown 1:2
  • Diameter: 30 mm – 3.5 m
  • Physical properties:
    • Density difference > 50 kg/m3
    • Viscosity: up to 500 mPa.s
    • Interfacial tension: >1mN/m
  • Materials: all metals, glass or GLMS combined with internals in PTFE or PVDF
  • Differential phase contact
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