Continuous refining process
This process continuously performs four refining sections,including degumming and deacidification, decolorization, deodorization, dewaxing .
The characteristics and application of continuous process:
The process has the advantages of high refining rate, low loss and high product quality.It is Suitable for large and medium refining workshop.
It is a mixed process of batch production process and continuous production process.
The characteristics and application of Semi-continuous process:The refining rate is higher than that of batch production process. It is Suitable for medium and small oil factory.
Batch refining process
Each refined sections operate intermittently.
The characteristics and applicable batch refining process
Simple devices, less investment,flexible process.It allow to be replaced raw oil varieties at any time.It is Applicable to small oil refineries or oil refineries with frequent oil.
Degumming: Remove gums in the crude oil to improve oil edibility, storage and do well to downstream neutralizing section.
Neutralizing: Remove Free-Fatty Acids (FFAs) with caustic soda (NaOH). Soap stock is generate in this process.
Decolorizing /Bleaching: Remove color pigments contained in oil
Deodorizing: Remove disagreeable flavor and odors that are naturally present or created during processing under high temperatur
Dewaxing (Optional): Oils like sunflower oil or maize germ oil (corn oil) have waxes present in them. At low temperatures these waxes give a hazy appearance to the oil. So, in extremely cold areas, dewaxing should take into account when processing these oil seeds.