Grasas y Aceites, Vol 42, No 4 (1991)

Deacidification by distillation using nitrogen as stripper. Possible application to the refining of edible fats

E. Graciani Constante
Instituto de la Grasa y sus Derivados (CSIC), Spain

F. Rodríguez Berbel
Instituto de la Grasa y sus Derivados (CSIC), Spain

A. Paredes Torronteras
Instituto de la Grasa y sus Derivados (CSIC), Spain

J. Huesa Lope
Instituto de la Grasa y sus Derivados (CSIC), Spain


The possibility of substituting direct steam by nitrogen as stripper in the deodorizing or neutralizing distillation of oils and fats has been the subject of research in recent years. Although this is a practical possibility, it implies a greater cost due to the higher price of nitrogen, and the need to adapt the technology in order to maintain the deodorizer head pressure (as nitrogen does not condensate). These disadvantages would be compensated by a better quality of the oils and condensates, and a decrease in pollution.
The tests carried out indicate that the efficiency calculated in each of the operations is within the theoretical values, and that using from 1 to 1.5 times the theoretical amount of nitrogen, the refined oils are graded physically as good and very good by an expert. The condensates obtained have been of good quality.


Deodorizing; Edible fat; Nitrogen

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Copyright (c) 1991 Consejo Superior de Investigaciones Científicas (CSIC)

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