Treatment of tall oil soap

C - Chemistry – Metallurgy – 09 – F

Patent

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Details

C09F 1/00 (2006.01) C11B 1/04 (2006.01) C11B 13/00 (2006.01) C11B 13/02 (2006.01)

Patent

CA 2184244

The invention relates to a method for improving the separation of water in a tall oil preparation process which comprises: a neutralization stage in which a mixture of soap and water is neutralized with carbon dioxide, a water separation stage in which the aqueous phase containing bicarbonate is separated from the soap, and a cooking stage in which the soap obtained from the preceding stage is cooked with sulfuric acid to form tall oil, the improvement comprising the procedure that, after the neutralization with carbon dioxide but before the water separation stage, a second neutralization with sulfuric acid is carried out. The invention also relates to a process comprising the stages presented above for the preparation of tall oil.

L'invention concerne un procédé pour améliorer la séparation de l'eau au cours du processus de préparation de tallol. Ce procédé comprend une étape de neutralisation au cours de laquelle un mélange de savon et d'eau est neutralisé avec du gaz carbonique, une étape de séparation de l'eau au cours de laquelle la phase aqueuse contenant du bicarbonate est séparée du savon, et une étape de cuisson au cours de laquelle le savon obtenu dans l'étape précédente est cuit avec de l'acide sulfurique pour former du tallol. L'amélioration de la procédure se caractérise par une deuxième neutralisation effectuée avec de l'acide sulfurique, après la neutralisation avec le gaz carbonique, mais avant l'étape de séparation de l'eau. L'invention concerne également un procédé comprenant les étapes présentées ci-dessus, pour la préparation du tallol.

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