Sunflower, Corn and Rice bran oil is to be Dewaxed/Winterised before
consumption as it contains high molecular weight wax. The wax makes the oil
To obtain very clear quality of oil specially in cold conditions, oil needs
to be dewaxed/winterised. If oils stored at low temperatures , waxes, high
melting tri glycerides and certain gums may separate as solids from the oil.
This leads to an undesirable cloudy appearance , and many consumers may
mistakenly think the oil is spoiled.
The steps for the Dewaxing/winterising process are as follows:
The oil is cooled in crystallisers and gradually the crystal
formation takes place. Here filter aid is also added.
The oil is then transferred to a maturator where the crystals are
allowed to grow. The oil is continuously cooled by the help of
glycol water flowing through the coils.
Finally the oil is filtered on hermetic pressure leaf filters to
remove the waxes.
For Rice bran oil, Veendeep has developed P P Filters which are
more suitable for high wax oil.
The major advantages of this process is :
Single plant can be used for Dewaxing and Winterising.
Optimum care is taken to maintain the formed crystals till