Extraction Column Types: Agitated and Static Columns for Liquid-Liquid Extraction
As part of our liquid-liquid extraction equipment, Koch Modular has a wide range of extractors to choose from, both static and agitated columns. In addition to Koch Modular’s signature KARRⓇ Columns and SCHEIBELⓇ Columns, we also provide rotating disc contactors (RDC), pulsed columns, and special designs for those in need of an agitated column design, as well as sieve trays, random packing, and structured packing (SMVP) static columns.
Agitated Columns and Extraction Towers
KARRⓇ Column – Liquid Liquid Extraction Equipment
Characteristics
- Highest capacity: 30-60 M3/M2-hr
- Good efficiency
- Good turndown capability (25%)
- Uniform shear mixing
- Best suited for systems that emulsify
SCHEIBELⓇ Column – Liquid Liquid Extraction Equipment
Characteristics
- Reasonable capacity: 15-25 M3/M2-hr
- High efficiency due to internal baffling
- Good turndown capability (25%)
- Best suited when many stages are required
- Not recommended for highly fouling systems or systems that tend to emulsify
Rotating Disc Contactor (RDC) Columns – Agitated Column Design
Characteristics
- Reasonable capacity: 20-30 M3/M2-hr
- Limited efficiency due to axial backmixing
- Suitable for viscous materials
- Suitable for fouling materials
- Sensitive to emulsions due to high shear mixing
- Reasonable turndown (40%)
Pulsed Column Characteristics
- Reasonable capacity: 20-30 M3/M2-hr
- Best suited for nuclear applications due to lack of seal
- Suited for corrosive applications when constructed out of non-metals
- Limited stages due to backmixing
- Limited diameter/height due to pulse energy required
Static Columns
Packed – Random
- High capacity: 20-30 M3/M2
- Poor efficiency due to backmixing and wetting
- Limited turndown flexibility
- Affected by changes in wetting characteristics
- Limited as to which phase can be dispersed
Packed – Structured
- High capacity: 40-80 M3/M2-hr
- Poor efficiency due to backmixing and wetting
- Limited turndown flexibility
- Affected by changes in wetting characteristics
- Limited as to which phase can be dispersed
Sieve Tray Characteristics
- High capacity: 30-50 M3/M2-hr
- Good efficiency due to minimum backmixing
- Multiple interfaces can be a problem
- Limited turndown flexibility
- Affected by changes in wetting characteristics
- Limited as to which phase can be dispersed
Take a Deep Dive Into Liquid-Liquid Extraction
Explore the assembly of a KARRⓇ Extraction Column, use to effectively extract organic acid from a feed stream.
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