7.20: Acid-Base Extraction

Organic Chemistry Lab Techniques · LibreTexts

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    a) Extract the Acidic Component

    To extract the acidic component, add 5% sodium hydroxide to neutral carboxylic acid and amine. Extract the amine and sodium hydroxide. Add hydrochloric acid to the sodium hydroxide solution to get a carboxylic acid. If it is solid filter, if not then extract into organic solvent and add 2 molar hydrochloric acid to get a p H of 3-4.

    b) Extract the Basic Component

    To extract the basic component add 5% hydrochloric acid to neutral amine. Extract the neutral and hydrochloric solution. Add sodium hydroxide to the hydrochloric solution. If the solution is solid then filter, if not then extract into the organic solvent. Use 2 molar sodium hydroxide to get a p H of 9-11.
    Figure 7.8: Flow-charts for acid-base extraction.

    This page titled 7.20: Acid-Base Extraction was last modified on Tue, 11 Aug 2020 09:36:53 GMT and is shared under a CC BY-NC-ND license and was authored, remixed, and/or curated by Lisa Nichols via source content that was edited to the style and standards of the LibreTexts platform.