L-phenylalanine 1/2 sulfate and its use
AssigneeAjinomoto Co., Inc.
InventorsTsutomu Matsuishi, Hiromasa Maruyama, Toshio Kitahara, Akemi Kabashima, Ryuta Toyomasu
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Abstract
The present invention relates to L-phenylalanine 1/2 sulfate and its use in the purification of L-phenylalanine from fermentation broths. When the salt is crystallized from a fermentation broth of L-phenylalanine or a solution produced during an intermediate process of recovering L-phenylalanine from the fermentation broth, impurities derived from the fermentation broth are easily removed.
Claims6
A process for recovering L-phenylalanine from a fermentation broth containing L-phenylalanine, which comprises adjusting the molar ratio of sulfate ion to L-phenylalanine to greater than 0.5, forming L-phenylalanine 1/2 sulfate in solution and recovering L-phenylalanine crystals from said fermentation broth or from a solution thereof produced during said recovery process.
Dependencies are inferred from the claim text.