In low-temperature deodorization systems, vacuum is not an "auxiliary parameter" — it directly determines whether FFA and odor compounds can be effectively removed at lower temperatures, fundamentally reducing the formation of GE, 3-MCPD, and TFA.

The Relationship Between Vacuum and Byproducts:

Higher vacuum means lower vaporization temperatures for FFA and odor compounds. This results in:

· Effective deodorization without relying on extreme high temperatures

· Dramatically reduced formation rates of GE, 3-MCPD, and TFA

Ocean's independent multi-stage Roots vacuum unit achieves absolute pressure of ≤0.5–2 mbar inside the deodorizer.

Vacuum System Stability Is Equally Critical:

Vacuum fluctuations reduce stripping efficiency, and operators often compensate by "raising the temperature" — a common cause of GE, 3-MCPD, and TFA exceedances.

Ocean's system ensures vacuum stability through:

· Multi-stage vacuum pump configuration (steam jet + Roots + liquid ring)

· Strictly matched condensers at each stage

· Automatic vacuum regulation responding to pressure changes

Residence Time Optimization:

Inside the deodorizer, oil residence time is equally critical. Ocean's internal design (structured packing + distribution trays) ensures:

· Uniform oil flow distribution, no dead zones or short-circuiting

· 30–40% shorter average residence time while achieving the same finished oil specifications

Actual Results:

Conclusion:

A high-vacuum system (≤2 mbar) combined with optimized residence time design is the prerequisite for low-temperature deodorization. Ocean's solution ensures complete deodorization within 30–50 minutes while controlling GE to ≤1.0 mg/kg, 3-MCPD to ≤1.25 mg/kg, and TFA increase to ≤0.5% , achieving steam consumption of ≤32 kg/ton oil. Three byproduct controls — glycidyl esters, 3-MCPD esters, and trans fatty acids — one engineering solution.