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US 10,239,822 B2Granted
Process for the separation of long chain amino acids and dibasic acids
AssigneeVitaworks IP, LLC
InventorSongzhou Hu
Life of this patent
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Abstract
There is disclosed a process for the separation of long chain dibasic acid and fatty acid, comprising: (1) reacting a mixture of long chain dibasic acid and fatty acid with ammonium hydroxide to form an insoluble ammonium salt of fatty acid and a soluble ammonium salt of long chain dibasic acid; (2) recovering the insoluble ammonium salt of fatty acid; and (3) adding an acid to the mother liquor of step (2) to obtain the long chain dibasic acid.
Claims9
A process for the separation of long chain dibasic acid from one or a mixture of two or more fatty acids, comprising:
- (1) reacting a mixture of long chain dibasic acid and one or more fatty acids with an aqueous solution of ammonium hydroxide, ammonium bicarbonate, ammonium carbonate, organic amine of the formula NR1R2R3, or a mixture of two or more thereof, to form a suspension of the ammonium salt of fatty acid in a solution of the ammonium salt of long chain dibasic acid, in the absence or presence of solvent;
- (2) separating the solid ammonium salt of fatty acid from step (1) by means of solid-liquid separation to provide a mother liquor containing the ammonium salt of long chain dibasic acid;
- (3) adding an acid to the mother liquor of step (2) or a solution of the ammonium salt of long chain dibasic acid to yield the long chain dibasic acid;
- and
- (4) recovering the long chain dibasic acid by means of solid-liquid separation or by extraction with an extractant solvent.
2 more elements
Dependencies are inferred from the claim text.