Process for the extractive separation of a carboxylic acid...

C - Chemistry – Metallurgy – 07 – C

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260/532.5

C07C 51/48 (2006.01) C07C 53/124 (2006.01) C07C 57/04 (2006.01)

Patent

CA 1274847

PRECIS DE LA DIVULGATION Procédé de séparation d'au moins un acide choisi parmi l'acide isobutyrique et l'acide méthacrylique par extraction à partir d'une solution aqueuse dudit acide en utilisant un système solvant organique comprenant du toluène, suivie d'une distillation au cours de laquelle le système solvant est récupéré et renvoyé intégralement à l'extraction. Le système solvant est un mélange de toluène et d'au moins un ester organique saturé faiblement soluble dans l'eau et ayant une températu- re d'ébullition comprise entre 98°C et 130°C. Application à la purification de l'acide méthacrylique.

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