500L Capacity Solvent Extraction Plant SUS304 Solvent Extraction Equipment For Herbal Tinctures

500L Solvent Extraction Plant Oil Machine for Herbal Tinctures & Natural Pigments

Product Overview

This 500L solvent extraction system is engineered for maximum recovery of oils and oleoresins from botanicals with naturally low lipid content. Utilizing food-grade hexane or ethanol, this batch extractor achieves near-total depletion of the plant matrix. The system features a vacuum-rated extraction tank, a falling-film evaporator for efficient solvent recovery, and an explosion-proof design for safe operation. It is the industry standard for producing herbal tinctures, spice oleoresins (paprika, black pepper), and natural colorants where steam distillation or cold pressing is either impossible or economically unviable.

Cause

Many valuable botanicals, such as jasmine petals, vanilla beans, and marigold flowers, contain less than 2% essential oil. Applying steam distillation to these materials is energy-intensive and yields poor returns. Cold pressing is physically impossible with dried or resinous material. Without solvent extraction, these precious compounds would be lost to waste. However, traditional solvent plants often suffer from low recovery rates (below 90%), leading to high operating costs and environmental compliance issues due to volatile organic compound (VOC) emissions. The industry needs a closed, efficient, and safe method to handle low-yield feedstocks.

Solution

This system solves the efficiency gap with a counter-current extraction design that maximizes contact time between solvent and biomass. The process is followed by a high-vacuum falling-film evaporator, which gently strips the solvent from the oil at temperatures below 45°C, preserving heat-sensitive compounds. Crucially, the solvent recovery rate is optimized to 97.5%, drastically reducing the need for new solvent purchases and minimizing hazardous waste disposal. The fully sealed, nitrogen-blanketed system mitigates explosion risks, ensuring a safe working environment even when handling volatile organic solvents.

Specifications

Application

This equipment is essential for the natural food coloring industry—extracting paprika oleoresin for snacks and turmeric curcumin for mustard. It is also used in the fragrance industry to produce "concrete" and "absolute" from delicate flowers like jasmine and rose. Additionally, it is widely applied in the nutraceutical sector to create standardized herbal extracts (e.g., St. John's Wort, Milk Thistle) where a specific active compound percentage must be guaranteed.

How It Works

Dried, ground plant material is placed in the extraction vessel. Solvent is pumped in and circulated through the bed of material. The solvent dissolves the oils, resins, and pigments. This "miscella" (solvent-oil mixture) is then pumped to the evaporator. Under vacuum, the solvent boils at a much lower temperature, vaporizing and leaving the pure extract behind. The solvent vapor travels to a condenser, where it is returned to liquid form and stored in a recovery tank for reuse in the next batch.

How To Choose

Selecting a solvent system requires careful safety and regulatory planning. First, choose your solvent based on end-use: ethanol is preferred for dietary supplements and cosmetics; hexane is standard for industrial food oils but requires more stringent safety controls. Second, confirm local building codes regarding EX-Proof zoning. Third, ensure you have access to steam or a thermal oil heater for efficient evaporation. Fourth, consider the final consistency of your product—oleoresins are often thick and sticky, requiring a heated discharge valve. Fifth, validate the solvent recovery efficiency; a difference of just 3% recovery translates to thousands in annual solvent costs.

FAQ

Q: Is there any solvent residue left in the final oil?

A: Our process includes a steam-stripping stage at the end of the evaporation cycle. This reduces residual solvent levels to below 10 ppm (parts per million), which complies with USP and EU food safety standards for solvent-extracted products.

Q: Can I use the same machine for both ethanol and hexane?

A: Yes, the stainless steel construction is compatible with both. However, you must thoroughly clean and dry the system between solvent changes to prevent cross-contamination and manage different safety protocols (hexane is much more flammable).

Q: What kind of maintenance does the vacuum pump require?

A: The liquid ring vacuum pump requires monthly oil changes and seal checks. We recommend a preventive maintenance contract for the first year to ensure operators are trained on proper pump care to maintain deep vacuum levels.