RAFFINAGE par De Smet technologie - - World leader in oils & Fats technologies - extraction of oilseeds - vegetable oils
Ice Condensing Sublimax technology by De Smet
The Sublimax®(patented) is a new generation vertical Ice Condensing technology, optimised specifically for the deodorising process, achieving very low absolute pressures and drastically reducing the running cost of the plant in terms of energy consumption and polluted water flow. Special vacuum production units have been developed to reach lower pressures and operating costs, and at the same time, to reduce emissions by a more efficient condensation of the volatiles. The dry ice condensing system is becoming more and more the standard in new refining plants. In this system, the sparge steam is iced on surface condensers working alternately at extreme low temperatures (around –30°C).
De Smet supplied over 200 wet and 250 dry degumming units. |
De Smet has supplied over 145 neutralising units.
This operation consists in neutralising the free fatty acids, using caustic soda. The process transforms the free atty acids into soaps.
These are no longer soluble in water and can be removed easily by decantation or centrifugal force. The removal of the free fatty acids does not close neutralisation, as the operation also eliminates the phospholipids that are not hydrated at degumming level, and it reduces the amount of metal traces as well as some pigments and minor constituents.
De Smet has supplied over 145 neutralising units. |
Bleaching technology
Bleaching is the process operation which is carried out before deodorisation.
In addition to colouring matters, the bleaching treatment using actived earth will remove residual phosphatides, metals, soaps and oxidation products.
Bleaching in 3 stages : Bleaching is performed in 3 stages ...
Initial mixing of oil with bleaching earth under controlled conditions of temperature, acidity and humidity for a specific residence time. Secondly the oil is heated under vacuum with sparge steam to ensure proper mixing with bleaching earth for a specific residence time.
De Smet has supplied over 530 bleaching plants |
De Smet, World leader in winterising plants
Winterisation is an operation designed to preserve limpidity and refined oils brightness.
The Wintrend® 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.
De Smet supplied over 110 winterising plants |
