A Large Scale Soxhlet Extraction Machine is designed for manufacturers who need repeatable, high-yield extraction of active ingredients from solid materials at industrial throughput.
For botanical extracts, traditional medicines, nutraceuticals, food ingredients and selected fine chemicals, it provides a controlled way to perform solid–liquid extraction, vacuum concentration and solvent recovery in a single, integrated system.
Nanjing Hjchem Equipment Co.,Ltd focuses on engineering large-scale Soxhlet systems that do more than simply extract.
Our machines combine Soxhlet extraction, multi-functional (dynamic circulation) extraction, vacuum concentration and solvent recovery on one modular platform, simplifying plant layout, operation and maintenance while protecting the quality of heat-sensitive products.
If you are planning a new extraction plant or upgrading from basic decoction and single-function equipment, a Large Scale Soxhlet Extraction Machine can significantly improve yield, quality and operational efficiency.
What Is a Large Scale Soxhlet Extraction Machine?
A classical Soxhlet extractor is a glass device used in analytical laboratories to repeatedly wash a small solid sample with hot condensed solvent. It offers high extraction efficiency and complete solvent recycling but is limited to gram-scale.
A Large Scale Soxhlet Extraction Machine from Nanjing Hjchem translates this principle into an industrial stainless-steel system capable of handling kilogram to ton-scale batches. Key characteristics include:
Continuous cyclic washing of solids with freshly condensed solvent
Closed-loop solvent circulation with integrated recovery
Controlled heating, vacuum, and reflux for precise process conditions
Automation and safety features suitable for production environments
Unlike a single vessel, our large-scale machine is a complete extraction line in one skid, designed to integrate naturally with upstream raw-material handling and downstream purification or formulation.
Large Scale Soxhlet Extraction Machine Structure
Integrated Process Concept – Four Functions in One Machine
The main advantage of our Large Scale Soxhlet Extraction Equipment is that it combines four major process functions into a single, coordinated system:
1. Soxhlet Extraction Module
The Soxhlet module reproduces the classic Soxhlet principle at large scale:
Solvent is heated in a boiling or extraction tank until it vaporizes
Vapor moves to a condenser and turns back into hot liquid solvent
Condensed solvent repeatedly percolates through the solid material in a Soxhlet extraction chamber
Once the level rises to a set point, the solvent automatically siphons back to the boiling area, carrying dissolved actives
This cyclic operation provides deep extraction with excellent solvent economy and highly consistent conditions across each batch.
2. Multi-Functional Dynamic Circulation Extraction Module
In addition to Soxhlet mode, the machine includes a dynamic circulation extraction system:
Solvent is pumped through the extraction tank and solid bed in a forced-circulation loop
Flow rate, temperature and extraction time can be precisely controlled
Suitable for faster extractions or materials that benefit from strong circulation and mixing
Because the Soxhlet extraction system and dynamic circulation extraction system can be flexibly combined or used individually, the same machine can support:
Pure Soxhlet mode for deep cyclic extraction
Pure dynamic circulation mode for high-throughput operation
Hybrid strategies when process development indicates benefits from both approaches
This flexibility is particularly useful for manufacturers handling many different botanical formulas or product types on one line.
3. Vacuum Concentration Module
After extraction, the liquid phase often needs concentration and volume reduction before downstream processing. Our vacuum concentration system allows you to:
Transfer extract-rich solvent into a dedicated concentration vessel
Apply vacuum (reduced pressure) to lower the boiling point of the solvent
Concentrate the extract at significantly lower temperatures than at atmospheric pressure
This approach protects heat-sensitive compounds and prepares a concentrated extract ready for drying, formulation or further purification.
4. Solvent Recovery Module
Solvent is a major operating cost in many processes. The integrated solvent recovery system:
Condenses vapors released during concentration
Returns solvent to storage or directly back to the extraction circuit
Minimizes solvent loss to the environment
By uniting extraction, concentration and solvent recovery, the Large Scale Soxhlet Extraction Machine reduces piping, intermediate handling and the number of separate units required onsite.
Details of Soxhlet Extraction Equipment
Features of Nanjing Hjchem Large Scale Soxhlet Extraction Machine
1. Stainless Steel Construction and Hygienic Design
All product-contact components in the system are made from stainless steel (typically SS304 or SS316L, chosen according to solvent and corrosion requirements). This offers:
Excellent corrosion resistance with common solvents such as water, ethanol–water mixtures and many organic solvents
Smooth internal surfaces that simplify cleaning and reduce risk of cross-contamination
Compatibility with hygienic fittings and gaskets required in food, pharmaceutical and cosmetic production environments
Optional internal polishing and sanitary connections can be specified to meet your plant’s hygiene and regulatory expectations.
2. Modular Subsystems – Linked or Independent Operation
One key benefit of our design is that the major subsystems can function:
Linked together as a single, fully integrated extraction–concentration–recovery line, or
Independently, with each subsystem operating as its own process module
For example:
You can use only the dynamic circulation extraction module for a specific formula
You can run only the vacuum concentration + solvent recovery module to process extracts produced elsewhere
You can perform full cycles of Soxhlet extraction followed by vacuum concentration and solvent recovery without moving the mixture to external equipment
This modularity allows the Large Scale Soxhlet Extraction Machine to adapt to changing production priorities and product pipelines over time.
3. Automation, Control and Data
To support high-quality operation and documentation:
The system can be equipped with PLC-based automation and a touch-screen HMI
Parameters such as temperature, vacuum level, cycle time, solvent levels and flow can be monitored and controlled
Recipe-based operation allows you to store and recall optimized processes for different products
Data logging supports batch records, audit requirements and continuous improvement initiatives
This level of transparency and control supports the Experience, Expertise, Authoritativeness and Trustworthiness (EEAT) that modern customers and regulators expect from serious process equipment suppliers.
Frequently Asked Questions (FAQ)
1.When should I choose a Large Scale Soxhlet Extraction Machine instead of a simple extraction tank?
Choose a large-scale Soxhlet machine when you need deep, repeatable extraction with efficient solvent recycling, or when laboratory development has been based on Soxhlet methods and you want similar performance at production scale. It is especially useful for high-value botanical and pharmaceutical products.
2.Can the machine handle different recipes and raw materials on the same line?
Yes. The combination of Soxhlet extraction and dynamic circulation extraction, together with recipe-based control, makes it suitable for multiple formulas. You can adjust temperature, vacuum level, extraction time and circulation mode to fit each product.
3. How does the integrated vacuum concentration improve the overall process?
Integrated vacuum concentration allows you to concentrate the extract at lower temperatures immediately after extraction. It reduces energy losses from transferring the liquid to separate concentrate units, protects heat-sensitive ingredients and simplifies solvent recovery in the same machine.
4. What information do you need to size and design a custom machine?
Typically we need data on your raw material type and density, target actives, preferred solvent, batch size or throughput per day, desired extraction temperature and time, and any specific regulatory or safety requirements (such as explosion-proof classification).
5. Can this machine be integrated into an existing plant with its own utilities and CIP system?
In most cases, yes. Our engineers will review your existing steam, cooling water, vacuum, compressed air and CIP availability, and design the Large Scale Soxhlet Extraction Machine with compatible connections and control interfaces so it can be integrated smoothly into your current facility.