SPE Short‑Path Distillation Unit 8‑50m² | Internal Condenser Vacuum Molecular Distiller for Heat‑Sensitive Material Purification

The SPE short path distillation unit is a high-efficiency molecular distillation system for high-vacuum separation of heat-sensitive, high-boiling and easily oxidized materials. The condenser is built directly inside the evaporator body and faces the heated evaporation surface, greatly shortening the molecular migration distance and enabling separation far below the atmospheric boiling point. This industrial scale series (SPE-8 to SPE-50, heating area 8-50 m²) supports continuous large-volume production and can be supplied as a complete turnkey distillation plant.

The SPE short path distiller relies on the difference in molecular mean free path for separation and runs continuously under high vacuum. The feed enters the heated cylinder, is wiped into a uniform thin film by the rotating scraper and flows downward. The jacket heats the thin film and the light components evaporate far below their atmospheric boiling point. The evaporated molecules travel a very short distance to the built-in condenser, condense and are discharged as the light fraction. The heavy fraction cannot reach the condenser and flows down to be discharged separately, achieving purification.

• Built-in condenser facing the evaporation surface for a short molecular path and high condensation efficiency
• High-vacuum low-temperature operation for heat-sensitive, easily oxidized and high-boiling materials
• Six scraper types available: Sliding, Flexible, Hinge, Fixed, Roller and Spiral
• Industrial scale (8-50 m²) for continuous large-volume production
• Complete turnkey supply: cold trap, feed pump, concentrate pump, condensate pump and vacuum unit
• Fully sealed structure with sanitary-grade materials for chemical, pharmaceutical and food processes

• Jacketed heating cylinder providing uniform heating to form the evaporation surface
• Rotating wiper system (sliding / flexible / hinge / fixed / roller / spiral) to force film formation and reduce wall fouling
• Built-in coaxial condenser to shorten the molecular diffusion distance
• Variable-frequency drive mechanism for the wiper rotor
• Feed / discharge ports and heating / cooling medium ports
• Sealing components to maintain high vacuum
• Optional auxiliary units: cold trap, feed pump, concentrate pump, condensate pump, vacuum unit and control system

• Fine chemical: high-boiling solvents, silicone oil, additives, polymer intermediates and desolvation
• New materials: desolvation and purification of special high-boiling materials
• Food & oil: natural vitamin purification, fish oil refining, essential oils, fatty acids and monoglycerides
• Pharmaceutical & biological: pharmaceutical intermediates and plant extracts