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dewaxing plant
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Winterisation is an operation designed to preserve limpidity and refined oils brightness.The Dewaxing process consists in removing from these oils, mainly maize and sunflower, small quantities of solids that cause cloudiness when the oil is kept at ambient or low temperature. These solid substances can be saturated glycerides or waxes. Thanks to the relatively small amount of solids - between a few hundred and 2000 ppm - winterising is a continuous and, therefore, cost-effective process. In order to obtain an oil with good stability, the wax content needs to be reduced to a level of less than 10 ppm. To achieve this, the variables of time, temperature and agitation require special care to produce oil in a closely controlled range.The process is conducted in four steps : The oil is precooled in heat exchangers,? Filter aid is added and the oil is cooled very slowly,? The crystallised oil stays a few hours in a maturator, at final cooling temperature, The oil is then filtered in horizontal hermetic leaf filters. The oil temperature is often raised just before filtration, to reduce viscosity and hence facilitate filtration.? Dewaxing Major Advantages One single plant only for Dewaxing & Winterising Perfect cold stability - at least 72H at 0oC Two-step filter aid dosage - minimal consumption Gradual cooling - reduced filter aid consumption Fully closed process - no oil oxidation
dewaxing plant
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