Oils like those of sunflower, corn and cotton-seed contain wax molecules which cannot be dissolved in room tempareture .Waxes sink in oil and results in turbidity.Oil needs an elaborate care to be able to be kept clear, bright and free from storing conditions.What should be done concerning this issue will be talked aboutin details below in winterization phase . Once the quantity of wax in oil exceeds 700 ppm , the cost of standart winterization process in which waxes are removed through being filtered , increases a lot and those waxes cannot be removed thoroughly because of excessive soil consumption and oil loss.
At the same time , the quantity of waste soil decreases in a significant rate in the winterization which will be applied after dewaxing process.That’s why,pre-dewaxing with centrifuge should be applied to be able to decrease the propertion of wax up to 50-200 ppm before filtration and winterization.
The process of dewaxing is a kind of accelerated winterization and crystallization is completed in a shorter time space than %30-50 in this process and emerging crystalls are removed from oil by centrifuge seperators.