Process for producing amino acid
View Patent ↗L-valine granules are produced by adding L-glutamic acid to an aqueous solution containing L-valine so that the amount of L-glutamic acid is 0.5% by weight or more relative to the L-valine, dissolving the L-glutamic acid, then adjusting the pH of the aqueous solution to an acidic level and then crystallizing the L-valine.
1. A process for producing L-valine crystal granules, comprising:
adding L-glutamic acid to an aqueous solution containing L-valine so that the amount of L-glutamic acid is 0.5% by weight or more relative to the L-valine;
dissolving the L-glutamic acid;
then adjusting the pH of the aqueous solution to an acidic level; and
then precipitating the L-valine as crystals.
2. The process according to claim 1 , wherein the acidic level of the aqueous solution is pH 3.0 to 6.0.
3. The process according to claim 1 , wherein the precipitation of the L-valine is conducted under reduced pressure.
4. The process according to claim 1 , wherein L-valine is present in the aqueous solution at 20 g/L or higher.
5. The process according to claim 2 , wherein the precipitation of the L-valine is conducted under reduced pressure.
6. The process according to claim 2 , wherein L-valine is present in the aqueous solution at 20 g/L or higher.
7. The process according to claim 3 , wherein L-valine is present in the aqueous solution at 20 g/L or higher.
8. The process according to claim 5 , wherein L-valine is present in the aqueous solution at 20 g/L or higher.