De Smet builds deodorising plants for oil and fats
De Smet builds deodorising plants for oil and fats

De Smet supplied over 200 wet and 250 dry degumming units and is world leader in Fats and oil technology


De Smet Deodorising- world leader in fats and oil technology


Ice Condensing Sublimax


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 minus 30°C.

The remaining non-condensables are removed either by mechanical pumps or roots blowers in series with a liquid ring pump or by a vacuum steam ejector system (booster). The dry ice condensation system reduces the motive steam consumption but requires extra electrical energy.


Ice Condensing Sublimax

Feedstock Change Deodorisers


The Multistock® is a single shell compact column containing several integrated trays or compartments.
In the upper part of the Multistock® the oil is heated to deodorising temperature and then cooled in the lower part of the Multistock®

Thermosyphon heat exchange This is accomplished with the thermosyphon heat recovery system in which the hot oil after deodorization is used to generate steam, which is condensed in the top tray to heat the incoming bleached oil.
In the second tray the oil is heated to deodorization temperature with high pressure steam.

In the deodorizing trays the oil remains as a batch in the tray and movement must be induced.
This is done by introducing the stripping steam into the tray in a number of gas-lift pumps.

De Smet Multistock®

Multi Stock deodorisers


The Multistock® is designed for the factory requiring maximum flexibility in processing different feedstocks daily. Product change is totally automated with the possibility of no production loss and minimum interstock contamination.

The Multistock® vessel mechanical design and process operating data covering normal operation, start-up and shut-down conditions have been submitted to rigorous finite element analysis for possible metal fatigue problems due to the thermal cycles (400.000 cycles over 20 years operation).

The highest stressed areas are strengthened and welding specifications guarantee a long working life.

De Smet plants are processing safflower


Final stage in refining process

Deodorising is the final stage in oil refining. Deodorising removes odoriferous material, free fatty acids and other undesired minor components to produce a bland oil with a good shelf life.


Available deodorising technologies


We supply a Continuous Deodoriser, the Qualistock® and a Feedstock change Deodoriser, the Multistock®.

Organoleptic & Nutritional Value - Shelf life
Ice Condensing Sublimax

Ice Condensing Sublimax

Feedstock Change Deodorisers

De Smet Multistock®

Multi Stock deodorisers

De Smet plants are processing safflower


Organoleptic & Nutritional Value - Shelf life

De Smet builds deodorising plants for oil and fats
Deodorisation techniques | De Smet refining specialist | Deodorising plant for oil
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