UIC KD Series Short-Path Molecular Distillation System

Overview

The UIC KD Series Short-Path Molecular Distillation System is a high-precision, industrial-scale purification platform engineered for thermally sensitive, high-boiling-point compounds under ultra-high vacuum conditions. Operating on the principle of short-path molecular distillation—where molecules travel directly from evaporator surface to condenser without intermolecular collision—the system enables separation based on mean free path differences rather than boiling point alone. This physical separation mechanism is critical for preserving molecular integrity in applications such as fatty acid methyl ester (FAME) purification in biodiesel production, phospholipid isolation, vitamin concentration (e.g., vitamin A, E), and recovery of polyunsaturated fatty acids (PUFAs) from fish oil or animal by-products. Designed and manufactured in Germany, the KD Series integrates vacuum-tight stainless steel construction (AISI 316L), precision-machined rotating wiper systems, and temperature-controlled heating/cooling zones to ensure uniform film formation, minimal residence time (<1–5 s), and exceptional thermal stability. Its deployment in Saria Bio-Industries’ Malchin plant—processing ~700 metric tons/day of animal fats—demonstrates scalability across pilot, demonstration, and full commercial biorefinery operations.

Key Features

• Modular short-path evaporator design with adjustable wiper geometry for optimal thin-film dynamics across viscous and non-Newtonian feedstocks
• Ultra-high vacuum capability (≤0.001 mbar) maintained via integrated UIC-certified dual-stage vacuum system with cold trap and oil diffusion pump options
• Heating mantle with PID-controlled temperature regulation (up to 300 °C, ±0.5 °C accuracy) and separate condenser cooling (−20 °C to +20 °C)
• Evaporator internal diameters ranging from 300 mm to 800 mm, supporting scalable throughput from 50 kg/h (lab-scale validation) to 20,000 kg/h (industrial continuous operation)
• Three independently temperature-controlled collection flasks with level monitoring and automated fraction switching capability
• Full-surface condenser geometry matching evaporator area (3–100 m²), ensuring >95% condensation efficiency even at low vapor pressure differentials
• ASME Section VIII Div. 1 and PED 2014/68/EU compliant pressure vessel certification; all wetted parts electropolished to Ra ≤ 0.4 µm

Sample Compatibility & Compliance

The KD Series accommodates a broad spectrum of heat-labile and high-molecular-weight feedstocks, including crude animal tallow, used cooking oil, fish oil, lanolin derivatives, natural waxes, and synthetic polymer precursors. It is routinely employed in compliance with ASTM D6751 (biodiesel fuel standard), ISO 20480 (marine biofuel specifications), and EU Regulation (EC) No 1099/2009 governing animal by-product processing. The system’s design supports GLP and GMP-aligned operation: traceable calibration records per ISO/IEC 17025, audit-ready vacuum log files, and material traceability through batch-coded components. All electrical instrumentation meets ATEX Zone 1/21 requirements for potentially explosive atmospheres encountered during volatile organic handling.

Software & Data Management

UIC’s proprietary DISTRO-SOFT v5.2 provides real-time process supervision via Ethernet-connected HMI with multi-user access control. The software logs ≥100 parameters—including vacuum pressure (Pirani + capacitance manometer), evaporator/condenser temperatures, feed flow rate, wiper speed, and collector weight—with timestamped CSV export and optional integration into LIMS or MES platforms. Electronic signatures, user role-based permissions, and 21 CFR Part 11-compliant audit trails are enabled by default. Historical data is retained for ≥10 years with automatic backup to encrypted NAS storage. Remote diagnostics and firmware updates are supported via secure TLS 1.3 tunneling, minimizing unplanned downtime.

Applications

• Purification of FAME fractions from transesterified animal fats to meet EN 14214 and ASTM D6751 biodiesel specifications
• Concentration of omega-3 EPA/DHA from fish oil hydrolysates while minimizing cis-trans isomerization
• Deodorization and decolorization of edible oils without steam stripping-induced hydrolysis
• Recovery of tocopherols and sterols from deodorizer distillates in vegetable oil refining
• Isolation of active pharmaceutical ingredients (APIs) from reaction mixtures containing residual catalysts or solvents
• Recycling of silicone oils and fluorinated lubricants in semiconductor manufacturing waste streams

FAQ

What vacuum level is required for optimal molecular distillation performance?

Typical operating range is 1×10⁻³ to 5×10⁻⁴ mbar, achievable using the integrated UIC dual-stage vacuum system with liquid nitrogen cold trap.
Can the KD Series handle feedstocks with suspended solids or high viscosity?

Yes—pre-filtration (≤50 µm) is recommended; the wiper system maintains stable film formation up to 50,000 cP at 100 °C.
Is the system compatible with hazardous or corrosive feed materials?

All standard configurations use AISI 316L stainless steel; Hastelloy C-276 or glass-lined variants are available upon request for aggressive media.
How is cleaning-in-place (CIP) performed between batches?

The system supports hot solvent recirculation (e.g., ethanol, heptane) through dedicated CIP ports with programmable temperature and flow profiles.
Does UIC provide validation documentation for regulatory submissions?

Yes—IQ/OQ/PQ protocols, FAT/SAT reports, and material compliance certificates (RoHS, REACH, FDA 21 CFR 177.1520) are supplied as standard deliverables.