Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1985-11-08
1987-06-30
Mars, Howard T.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568621, C07C 4138, C07C 4136
Patent
active
046772316
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 state unseparated.
According to the present invention, 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 the form which can be reused. Further after the treatment with an adsorbent, the concentration of heteropoly acids in the polyalkylene ether can be reduced to extremely lower.
REFERENCES:
patent: 2751419 (1956-06-01), Hill et al.
patent: 4137396 (1979-01-01), Louvar et al.
patent: 4460796 (1984-07-01), Mueller
patent: 4480124 (1984-10-01), Mueller
patent: 4500705 (1985-02-01), Copelin
patent: 4528364 (1985-07-01), Prier
Aoshima Atsushi
Tonomura Shoichiro
Yamamatsu Setsuo
Asahi Kasei Kogyo Kabushiki Kaisha
Mars Howard T.
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