Process for purifying long chain amino acids
AssigneeVitaworks IP, LLC
InventorsSongzhou Hu, William S. Hu
Life of this patent
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Abstract
There is disclosed a process for the purification of long chain amino acids by recrystallization in an aqueous solution of organic carboxylic acid in the absence or presence of solvent, comprising: (1) dissolving a long chain amino acid in an aqueous solution of organic carboxylic acid by heating; (2) cooling the solution of step (1) to crystallize the long chain amino acid; and (3) recovering the long chain amino acid of step (2) by means of solid-liquid separation.
Claims19
A process for the purification of long chain amino acids of the following structure:
- wherein m is integer from 6 to 20;
- R1 and R2 are each independently hydrogen and C1-C12 alkyl groups, by recrystallization in an aqueous solution of organic carboxylic acid in the absence or presence of solvent, comprising:
- (1) dissolving a long chain amino acid in an aqueous solution of organic carboxylic acid by heating;
- (2) cooling the solution of step (1) to crystallize the long chain amino acid;
- and
- (3) recovering the long chain amino acid of step (2) by means of solid-liquid separation.
A process for the purification of long chain amino acids of the following structure:
- wherein m is integer from 6 to 20;
- R1 and R2 are each independently hydrogen and C1-C12 alkyl groups, by recrystallization in an aqueous solution of inorganic acid, comprising:
- (1) dissolving a long chain amino acid in an aqueous solution of inorganic acid by heating;
- (2) treating the solution of step (1) with activated carbon, or filter aid, or an extractant solvent;
- (3) cooling the solution of step (2) to crystallize the acid salt of the long chain amino acid;
- (4) separating the acid salt of step (3) by means of solid-liquid separation;
- and
- (5) neutralizing the acid salt of step (4) with a basic agent to yield the long chain amino acid.
A process for the purification of long chain amino acids of the following structure:
- wherein m is integer from 6 to 20;
- R1 and R2 are each independently hydrogen and C1-C12 alkyl groups, by forming an acid salt in an aqueous solution of inorganic acid, comprising:
- (1) dissolving a long chain amino acid in an aqueous solution of inorganic acid by heating to form an acid salt;
- (2) treating the solution of step (1) with activated carbon, or filter aid, or an extractant solvent;
- and
- (3) neutralizing the solution of step (2) with a basic agent to yield the long chain amino acid.
Dependencies are inferred from the claim text.