Method for eliminating free fatty acids from fats and oils...

C - Chemistry – Metallurgy – 11 – B

Patent

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C11B 3/06 (2006.01)

Patent

CA 2370785

In order to eliminate fatty acids from fats and oils of biological origin or their vapor condensates, the free fatty acids are extracted with a mixture of basic organic nitrogen compounds and water as extracting agents at a temperature below boiling temperature of the organic nitrogen compounds. The proportion of basic organic nitrogen compounds in the extracting agent should amount at least to approximately 20 percent by weight and at most approximately 60 percent by weight, preferably between approximately 30 and approximately 40 percent by weight. This prevents the formation of a viscose soapstock that is difficult to eliminate. The boiling temperature of the basic organic nitrogen compound(s) used should be the same or higher than the boiling temperature of the water and lower than the boiling temperature of the fatty acids to be extracted in order to facilitate easy recovery of the extracting agent.

L'invention concerne un procédé pour éliminer des acides gras libres, contenus dans des corps gras et des huiles d'origine biologique ou dans leurs condensats de vapeur, ledit procédé consistant à extraire les acides gras libres avec un mélange constitué de composés d'azote organiques, basiques et d'eau comme agent d'extraction, à une température inférieure à la température d'ébullition des composés d'azote organiques. La proportion de composés d'azote organiques basiques par rapport à l'agent d'extraction doit être comprise au minimum entre 20 % en poids environ et au maximum 60 % en poids environ, de préférence entre 30 % en poids environ et 40 % en poids environ. Il est ainsi possible d'éviter la formation d'une pâte de neutralisation visqueuse, difficile à éliminer. La température d'ébullition des composés d'azote organiques, basiques utilisés doit être supérieure ou égale à celle de l'eau, et inférieure à celle des acides gras à extraire, pour faciliter la récupération de l'agent d'extraction.

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