Patent No. EP3841191 (titled "Process For Dry Fractionation To Obtain A Final Hard Palm Oil Mid Fraction") was filed by AAK Publ on Aug 20, 2019. The application was issued on Nov 19, 2025.
A process for dry fractionation of a soft palm oil mid fraction (SPMF) produces a final hard palm oil mid fraction (fHPMF-A) with a high symmetry ratio (SatOSat/SatSatO triglycerides). The process comprises a first dry fractionation (FDF) of SPMF to yield an intermediate olein fraction (SPMF-O) and an intermediate stearin fraction (SPMF-S). The SPMF-O undergoes an ultrasound-assisted second dry fractionation (SDF), involving ultrasonic treatment (US2) of at least part of the input, to produce fHPMF-A and a palm oil olein fraction (POO). Additionally, the SPMF-S undergoes a third dry fractionation (TDF) to obtain a second hard palm oil mid fraction (sHPMF-B) and a palm oil stearin fraction (POSt). The SDF may include cooling the input to a supersaturated state prior to ultrasonic treatment.

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