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The Refining process has been explained under the heading Vegetable Oil Refining. Sundex Process Engineers Pvt. Ltd offers ChemicalÂ Continuous Refining Plants. The word Chemical Refining appears since caustic soda a chemical is used in refining of vegetable oils.
Some oils are dewaxed before packing so as to remove waxes, which are dissolved in the oil. Most of the oils do not need dewaxing as they contain little or no waxes. Only sunflower oil & Rice Bran oil contain appreciable quantities of wax to give a hazy appearance during winter season due to precipitation of dissolved waxes and hence require to be dewaxed. Dewaxing is carried out by chilling the oil up to 10-15ÃÂ°C followed by filtration of precipitated solids. The oil thus treated gives a sparkling appearance even in winter temperatures. More details available on request.
Winterization is another name to the process of dewaxing. The name winterization appears as during winter when the temperature is low, waxes present in the oil crystallizes, they give hazy appearance to the oil. Hence during winterization process oil is chilled, crystallizers made to form and are separated in pressure leaf filters. More details are available on request.