Process for removing impurities from polyalkyleneoxy...

Details Process for removing impurities from polyalkyleneoxy... Process for removing impurities from polyalkyleneoxy...

C - Chemistry, Metallurgy

09

B

260/178, 260/382

C09B 62/00 (2006.01)

Patent

CA 1199910

Abstract Of the Disclosure A process is provided for removing impurities from a polyalkyleneoxy coloring agent, which comprises heating a crude reaction product containing the polyalkyleneoxy coloring agent and impurities to a temperature at which the crude reaction product separates into two liquid phases, one phase containing the coloring agent in relatively pure form and the other phase con- taining the impurities; and separating the phase containing the coloring agent from the phase containing the impurities.

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