For the Most Difficult Emulsions

Pall’s PhaseSep HE Series Coalescer is a high efficiency separation cartridge that is designed to handle the toughest emulsions. Constructed with a fluoropolymer medium, Pall PhaseSep HE Series Coalescers can be used in a wide range of liquid / liquid separations in the refinery, chemical, flavor & fragrance, and biotechnology industries. The Pall PhaseSep HE Coalescer should be used for difficult emulsions where improved performance is required.

Performance of PhaseSep
HE Series Coalescers:

• Removes sodium down to  1 ppmw in cumene hydroperoxide
• Decreases sodium to <0.5 ppmw in refinery products
• Processes inlet dispersed liquid contaminant concentrations as high as 10%
• Separates emulsions with interfacial tensions as low as 0.5 dyne/cm

Note: Each application for the PhaseSep HE Series L/L Coalescer should be reviewed by Pall Corporation for technical feasibility. 

The Pall pre-filter and horizontal liquid / liquid coalescer system is depicted below. The first stage consists of a pre-filter housing that is used to remove solids from the inlet emulsion stream to protect the coalescer and ensure long service life. The pre-filter also functions as a pre-coalescer by initiating the process of combining the finer droplets in the emulsion into intermediate size drops that continue to enlarge in the coalescer medium.

In the coalescer housing, the liquid / liquid emulsion enters the PhaseSep HE series coalescing element and flows inside to outside. Dispersed phase droplets that are suspended in the continuous phase come together, or coalesce, as the emulsion moves through the fibrous coalescer medium. The coalescer medium has a tapered pore structure that varies from fine to coarse to allow for the growth of the drops. As the large coalesced droplets of the dispersed phase leave the coalescer cartridges, they are separated via density difference between the two phases in the settling zone of the horizontal housing.  The drops collect in a sump where automated level control and valves monitor the interface level. The sump can be located on the top or the bottom of the coalescer housing to address specific density differences between the two phases.



Compatibility
The PhaseSep HE series coalescer is compatible with many corrosive solvents encountered in the refinery, chemical, flavor & fragrance, and biotechnology industries including cumene  hydroperoxide, methylene chloride, ammonia, urea, caustics, amines, alcohols, and many other organic solvents.  For compatibility information with a specific chemical, please contact your Pall distributor or Pall applications engineer.