| 摘要 |
A process for separting the ammonium salt of a selected fluoroalkanoic acid from a selected hydrocarbyl oxyethoxylated polyether which comprises: A. extracting the ammonium salt (in the form of its corresponding acid) and the ethoxylated compound from an acidified aqueous mixture by agitating with a selected organic liquid and separating the organic liquid layer, B.1) contacting said organic liquid layer with activated alumina, B.2) washing and drying the alumina and contacting it with ammonium hydroxide, C. boiling the organic liquid obtained in step B.1) until the ethoxylated compound remains, D.1) acidifying the ammonium hydroxide solution obtained in step B.2) and isolating the denser organic phase from the lighter aqueous phase formed, D.2) steam distilling the organic phase after acidifying it and collecting the organic portion, D.3) steam distilling said organic portion in the presence of an acid and a non-volatile oxidizing agent and collecting the fluoroalkanoic acid distilled, D.4) neutralizing the fluoroalkanoic acid with ammonium hydroxide.
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