Vertical Percolation-Type Extraction
Vertical Percolation-Type Extraction
Mechotech engineers and manufactures the Percolation Extractor as turnkey process equipment for pharmaceutical, nutraceutical, food, and botanical extraction lines that recover compounds by passing solvent through a static bed of solid material. Feed is loaded into a vertical column and solvent percolates downward (or is recirculated) through the settled bed, dissolving target compounds as it passes, rather than the solids being continuously conveyed as in Mechotech's Continuous Extractor. Each unit is designed around the client's specific process parameters and target output, then fabricated, installed, and commissioned by Mechotech as a single accountable scope.
The Percolation Extractor is built in SS 316L (or a process-appropriate grade) as a vertical column vessel, with electropolished product-contact surfaces and integrated instrumentation so it can be cleaned in place between batches and operated under PLC-based control. Feed material is loaded and settled as a static bed within the column, and solvent is introduced at the top (or base, for upflow operation) so it percolates through the bed under gravity or pump-assisted flow, contacting the solids and drawing target compounds into solution as it travels through the bed depth. Because the bed itself is static rather than mechanically conveyed, percolation is well suited to feedstocks that retain their structure and porosity through extraction; where the feed must move continuously through multiple stages, Mechotech's Continuous or Counter-Current Extractor is the better fit. Capacity is configured to the customer's requirement, from pilot-scale systems for process validation to larger commercial installations with modular expansion, and every unit is delivered with full documentation to support GMP and regulatory qualification.
Process Flow
Technical Specifications
| Technology | Percolation solid-liquid extraction |
|---|---|
| Working Principle | Solvent percolates through a static, settled bed of feed material under gravity or pump-assisted flow, dissolving target compounds as it passes through the bed depth |
| Vessel Type | Vertical column vessel |
| Flow Direction | Downflow (top-fed) or upflow (base-fed), configurable |
| Product-contact Material | SS 316L (or process-appropriate grade), electropolished |
| Automation | PLC-based control |
| Capacity | Configured to requirement — pilot-scale to larger commercial installations with modular expansion |
| Compliance | GMP hygienic design; full documentation for qualification |
Plant Capacities
| Scale | Typical Duty | Configuration |
|---|---|---|
| Pilot | Process validation and trial extractions on the actual feed | Small vertical column with solvent distribution and miscella drawoff |
| Production | Plant-scale batch percolation | Column diameter and bed depth configured to the feed and the batch size |
| Large commercial | Larger batch volumes | Larger columns or additional columns, with modular expansion |
Bed depth, column size, flow direction, recirculation and solvent duty are configured to the feed and batch size; a pilot trial on the actual feedstock is recommended before scaling.
Manufacturing Process
Bed Loading
Prepared feed material is loaded into the vertical column and settled to form a static bed of consistent depth.
Solvent Introduction
Solvent is introduced at the top of the column (or at the base for upflow operation) to begin percolating through the settled bed.
Percolation Through the Bed
Solvent travels through the bed depth under gravity or pump-assisted flow, contacting the solids and dissolving target compounds as it percolates.
Miscella Drawoff
Solvent-and-extract solution (miscella) is drawn off from the base of the column once it has percolated through the full bed depth.
Recirculation (where configured)
Drawn-off miscella can be recirculated back over the bed for repeated passes to increase extraction, depending on the target yield and feedstock.
Bed Discharge
The spent, solvent-wet bed is discharged from the column once the batch has reached its target extraction level, and the column is cleaned in place for the next charge.
Major Plant Equipment
- Vertical percolation column
- Solvent introduction and distribution system
- Bed support / false bottom
- Miscella drawoff and collection manifold
- Recirculation pump (where configured)
- Bed discharge system
- CIP skid and spray-ball connections
- PLC-based control panel
Plant Output
Applications
- Pharmaceutical and nutraceutical process manufacturing
- Botanical and herbal extraction industries
- Food and flavour processing
- Extraction of feedstocks that retain structure and porosity as a static bed
Key Features
Static Bed Percolation
Solvent percolates through a settled, static bed of feed material, suiting feedstocks that retain their structure and porosity through extraction.
Hygienic Construction
Electropolished SS 316L product-contact surfaces, with the column cleaned in place (CIP) between batches and documentation to support GMP qualification.
Turnkey Engineering
Design, fabrication, installation, and commissioning are delivered as one accountable scope, so the client deals with a single engineering team from drawing to handover.
Scalable Capacity
The extractor is sized to the customer's requirement, from pilot-scale validation through to commercial capacity, with modular expansion as production grows.
Frequently Asked Questions
What is a Percolation Extractor and how does it work?
How is percolation different from Mechotech's Continuous Extractor?
Does Mechotech supply the complete Percolation Extractor?
What capacities are available for the Percolation Extractor?
Which industries use the Percolation Extractor?
How does percolation differ from the Batch and Rotary Extractors?
What information is needed to specify a Percolation Extractor?
Which related extraction pages does Mechotech list?
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