| 摘要 |
A method of obtaining optically active anhydrous phenylalanine crystals from an aqueous solution containing optically active phenylalanine, which involves crystallizing and precipitating optically active phenylalanine from an optically active phenylalanine super-saturated solution at a temperature, T, wherein the super-saturated solution is required to have an osmotic pressure pi (mOsm/kg.H2O) which is related to said temperature T in accordance with the following formula (I): pi >/=10,500-450T+4.4T2(I),wherein the method provides anhydrous crystals having excellent handleability.
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