C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/641.4
C07C 41/36 (2006.01) C07C 43/13 (2006.01) C08G 65/30 (2006.01)
Patent
CA 1268481
ABSTRACT A process for purifying a polyalkylene ether, which comprises mixing a polyalkylene ether or a mixture of a polyalkylene ether and an organic solvent containing a heteropoly acid and/or its salt with at least one solvent for purification selected from hydrocarbons having 3 to 15 carbon atoms or halogenated hydrocarbons having 1 to 15 carbon atoms and separating by precipitation the phase composed mainly of the heteropoly acid and/or its salt, and a process wherein the polyalkylene ether or a mixture of a polyalkylene ether and an organic solvent containing a heteropoly acid and/or its salt is brought into contact with a solid adsorbent capable of adsorbing the heteropoly acid and/or its salt in the presence of at least one solvent for purification as described above, either further after the separation according to the process described above, or in the unseparated state. The heteropoly acid and/or its salt dissolved in the polyalkylene ether or the mixture of the polyalkylene ether with the organic solvent can be removed efficiently in a form which can be reused. Further, after the treatment with an adsorbent, the concentration of heteropoly acids in the polyalkylene ether can be greatly reduced.
494863
Aoshima Atsushi
Tonomura Shoichiro
Yamamatsu Setsuo
Asahi Kasei Kogyo Kabushiki Kaisha
Ridout & Maybee Llp
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