C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 51/48 (2006.01) C07C 53/08 (2006.01) B27K 3/36 (2006.01)
Patent
CA 2719715
There is shown a method of purifying glacial acetic acid containing terpene and terpenoid impurities. Substantially dry acetic acid containing terpene and terpenoid impurities is combined with water and a suitable organic solvent, which is substantially immiscible with acetic acid and water, to form a separating composite extraction medium having a weight ratio of acetic acid: water of at least 1 :1. The components are separated into an organic phase and an aqueous acid phase, with the terpene and terpenoid impurities concentrated in the organic phase, and with the aqueous acid phase purified of terpene and terpenoid impurities. The purified aqueous acid phase is recovered, and the purified acetic acid is dried.
La présente invention concerne un procédé de purification dacide acétique glacial contenant des impuretés terpène et terpénoïdes. Lacide acétique substantiellement anhydre contenant des impuretés terpène et terpénoïdes est combiné à leau et à un solvant organique adapté, qui est substantiellement immiscible avec lacide acétique et leau, pour former un milieu dextraction de composites de séparation ayant un rapport en poids dacide acétique/eau dau moins 1/1. Les composants sont séparés en une phase organique et en une phase aqueuse acide, les impuretés terpène et terpénoïdes étant concentrées dans la phase organique, et la phase aqueuse acide étant purifiée des impuretés terpène et terpénoïdes. La phase aqueuse acide purifiée est récupérée, et lacide acétique purifié est séché.
Meilchen Melchior A.
Warner R. Jay
Celanese International Corporation
Smart & Biggar
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