In the fields of fine chemicals, biomedicine, and other high value-added products, traditional distillation technology faces challenges such as the decomposition of heat-sensitive substances and difficulties in separating high-boiling-point materials. Molecular distillation technology effectively addresses these issues through its unique separation mechanism, offering four key advantages over conventional methods：
Core Advantage 1: Low-Temperature, High-Vacuum Separation Environment
Molecular distillation systems operate under a high vacuum (0.1–100 Pa) with precise temperature control (±1°C), reducing the required separation temperature by 150–200°C compared to the material's atmospheric boiling point. For example, DHA/EPA concentration-traditionally requiring 200°C-can be achieved at 80°C and 5 Pa, increasing the retention rate of heat-sensitive substances to over 98.5%.
Core Advantage 2: Separation Based on Molecular Mean Free Path Differences
This technology leverages differences in the mean free path of molecules to achieve nanoscale separation precision. Experimental results show that for C20–C22 fatty acid homologs with boiling point differences of just 3–5°C, the single-stage separation factor reaches 1.25, representing a 4–6x efficiency improvement over traditional distillation.
Core Advantage 3: Film Mass Transfer-Enhanced Process
A rotating wiper system creates a dynamic liquid film (100–500 μm), increasing the mass transfer coefficient by two orders of magnitude (>1×10⁻⁴ m/s) compared to traditional packed columns. In the purification of an anti-HIV drug intermediate (4-methoxyacetoacetic acid methyl ester), material heating time was reduced to 30 seconds, and product purity rose from 92% to 99.7%.
Core Advantage 4: Additive-Free Physical Purification
As a purely physical process, molecular distillation eliminates the need for extractants or entrainers, complying with USP/EP pharmaceutical excipient standards. In natural vitamin E extraction, the product exhibits a peroxide value <0.5 mmol/kg and undetectable solvent residues (detection limit: 0.1 ppm), meeting infant food-grade requirements.
This technology is widely used in pharmaceutical-grade glycerol (USP), aviation lubricants, and OLED material monomer purification. Third-generation equipment featuring ceramic-based composite wiper systems achieves a processing capacity of 500 L/h with 40% lower energy consumption. With advancements in molecular dynamics simulation and intelligent control systems, the technology is evolving toward continuous, miniaturized operation, providing critical support for biopharmaceuticals, electronic chemicals, and other strategic emerging industries.