November 14, 2019 by vegetable oil refinery
To refine crude palm oil into RBD palm oil generally uses the physical refining process, which is preferred over the chemical refining process. Because high acidity (up to 5%) can lead to excessive loss of neutral oil in the soapstock after alkali neutralization. And ususally the crude palm oil has high content of free fatty acid, using physical refining process can better remove the free fatty acid from crude oil. [Related reading: How to remove free fatty acids from crude palm oil?]
Palm oil physical refining process flow chart
The palm oil physical refining process flow chart is as the above picture shows. It includes degumming, decolorization, deacidification and deodorization four processes.
The degumming process of crude palm oil:
The degumming machine in palm oil refinery plant
The decolorization process of crude palm oil:
The decolorization machine in palm oil refinery plant
The deacidification and deodorization of crude palm oil:
The deodorization tower in palm oil refinery plant
Under the vacuum and high temperature the FFA(free fatty acid) and bad smell will be taken out. Because the required temperature of deodorization process is very high, about 260℃, the palm oil must be deoxidized to remove the oxygen in advance to avoid the palm oil oxidation and go bad.
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