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US 8,785,695 B2Granted
Method for purifying compounds containing amino groups
AssigneeBASF SE
InventorsMartin Völkert, Burkhard Ernst, Wolfgang Siegel
Life of this patent
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Abstract
Method for purifying compounds (I) containing amino groups from a polar phase A, where (I) is converted by reaction with an aldehyde or ketone (II) into the corresponding imine (III) which is insoluble or sparingly soluble in the polar phase A, and then the imine (III) is converted to a nonpolar phase B and separated off from phase A, and then the compound containing amino groups is recovered from the imine (III).
Claims8
A method for purifying a diaminoalkyl compound (I), said method comprising:
- i) preparing said compound (I) by fermentation in an aqueous phase A;
- ii) converting said compound (I) through reaction with an aldehyde or ketone (II) into the corresponding imine (III) which is insoluble or sparingly soluble in the polar phase A;
- iii) transferring the imine (III) to a nonpolar phase B;
- iv) separating off from phase A;
- and
- v) recovering said compound (I) from the imine (III).
3 more elements
Dependencies are inferred from the claim text.