Hot Reflux Vacuum Liquid Extraction & Concentration Unit

Energy-Coupled Integrated System | 304/316L Stainless Steel | High-Yield Reflux Technology


This integrated system is a high-performance vacuum liquid extraction unit specifically developed for botanical herbs, animal-based medicines, and food additives. The system supports various solvents including water, ethanol, methanol, and acetone, while simultaneously performing solvent recovery and liquid concentration. By utilizing advanced secondary steam recovery technology, the equipment achieves a large reflux cycle in a fully enclosed state. It serves as the core equipment for herbal purification, active ingredient development, and solvent-saving production.

Hot Reflux Vacuum Liquid Extraction & Concentration Unit

Hot Reflux Vacuum Liquid Extraction & Concentration Unit

Core Value Propositions


  • High-Yield “Large Reflux”: Increases ointment yield by 10-15% compared to standard tanks by maintaining a high concentration gradient through continuous “fresh solvent” reflux.
  • Thermal Energy Coupling: Repurposes secondary steam from the vacuum evaporator as a heat source for the extraction tank, slashing total steam consumption by over 50%.
  • Solvent Consumption Specialist: Vacuum Liquid Extraction Unit operates in a fully sealed system where solvent is added only once. This reduces solvent usage by 30% and lowers consumption rates by 50-70%.
  • Compact Integrated Footprint: Combines multiple industrial stages into a single unit, significantly reducing workshop floor space requirements while maximizing ROI.

Primary Application Scenarios


Herbal & Botanical Purification: Ideal for extracting active compounds from herbs and animal-based medicines to prepare high-potency liquid extracts.

Natural Food Additives: Used for the precision concentration and purification of natural pigments, flavorings, and nutritional fortifiers.

Organic Solvent Recovery: Vacuum Concentration Unit ensures safe and economical recycling of expensive or flammable solvents like ethanol and acetone through closed-loop circulation.

High-Value Pharmaceutical Refining: Provides a high-speed dissolution environment for heat-sensitive drugs requiring strict ingredient preservation.

Solutions to Critical Technical Challenges


  • Thorough Ingredient Leaching: Continuous introduction of fresh thermal condensate prevents solvent saturation, forcing solutes out of raw materials at high speed.
  • Shortened Production Cycles: Traditional separate stages are merged, allowing the transformation from raw material to concentrated ointment to be completed in a single shift.
  • Zero-Waste Solvent Management: The integrated vacuum concentration unit ensures that volatile organic solvents trapped in the residue are almost entirely recovered.
  • Lowered Operational Overhead: By coupling energy between extraction and concentration, factories significantly reduce their daily utility expenses.
Model No.RCN-500RCN-1000RCN-2000RCN-3000RCN-6000
Extraction Tank Volume (L)5001000200030006000
Concentrator Volume (L)300500100015002500
Loading Capacity (kg)50-100100-250200-450300-700600-1500
Processing Time (h)3-64-65-75-86-8
Concentration Gravity1.2-1.351.2-1.351.2-1.351.2-1.351.2-1.35
Water Extraction Temp (℃)90-10090-10090-10090-10090-100
Alcohol Extraction Temp (℃)78-8378-8378-8378-8378-83
Vacuum Degree (MPa)0.05-0.080.05-0.080.05-0.080.05-0.080.05-0.08
Operating Pressure (MPa)0.08-0.20.08-0.20.08-0.20.08-0.20.08-0.2
Overall Dimensions (mm)2500×1500×50003000×2000×60003000×2000×80004000×2800×95004500×3500×10000

Frequently Asked Questions


Answer: The Hot Reflux Vacuum Liquid Extraction & Concentration Unit utilizes a continuous recycling process to maximize the saturation of the solvent. During operation, the solvent vapor generated in the concentration tank is condensed and returned to the extraction tank as fresh, hot solvent. This constant “reflux” allows for the exhaustive extraction of active ingredients from the raw material using a minimal amount of solvent. This excellent method reduces solvent consumption by 30% to 50% compared to traditional soaking methods, ensuring a successful and highly concentrated final yield.

Answer: By integrating both phases into a single Vacuum Liquid Extraction Unit, PCM allows for low-temperature processing that protects the molecular integrity of the extract. The vacuum environment lowers the boiling point of the solvent, enabling extraction and evaporation to occur at temperatures as low as 50°C. This is perfect for preventing the thermal degradation of heat-sensitive compounds. This elite level of thermal management ensures that the biological activity and aromatic profile of the botanical material remain absolutely intact throughout the entire cycle.

Answer: The Vacuum Liquid Extraction Unit is equipped with a high-precision condenser and an oil-water separator designed for extraordinary recovery rates. As the vapors are drawn through the cooling system, the different specific gravities of the essential oils and the solvent allow for precise separation. Our expert engineering ensures that even trace amounts of high-value volatile oils are captured. This reliable system is ideal for pharmaceutical and cosmetic applications where maintaining the purity of the chemical profile is a master requirement for the final product.

Answer: We manufacture our Vacuum Concentration Unit contact parts from high-grade 316L stainless steel to provide superior resistance to chemical corrosion and pitting. Hot reflux processes often involve the prolonged exposure of metal surfaces to acidic or reactive botanical compounds at elevated temperatures. Unlike standard 304SS, 316L contains molybdenum, which offers an ultimate layer of protection against stress-corrosion cracking. This sturdy construction ensures a long service life and meets the most rigorous GMP and food-grade sanitary standards for global export.

Answer: To achieve a professional and repeatable production cycle, the unit is integrated with a digital control panel that monitors vacuum levels, temperature, and reflux flow rates in real-time. By utilizing a Variable Frequency Drive (VFD), operators can fine-tune the agitation and pump speeds to match the specific density of the material. This level of technical oversight allows you to master the extraction parameters, ensuring that every batch of concentrate meets the exact same quality specifications. This consistency is successfully achieved through pioneering engineering and high-accuracy sensors.

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