反应详情

The residual mother liquor weighing 1359 g which contained 185.6 mmol of D-phenylalanine having an optical purity of 93.6% was adjusted to pH 0.5 with concentrated hydrochloric acid, and the resulting solution was concentrated until crystals began to precipitate to carry out crystallization. The aqueous slurry containing the crystals was filtered by suction at room temperature to give 74.8 mmol of glossy and grayish crystals of D-phenylalanine hydrochloride having an optical purity of 99.2%. The mother liquor contained 110.8 mmol of D-phenylalanine having an optical purity of 89.7%.

1. concentrationthe resulting solution was concentrated until crystals
2. customto precipitate
3. customcrystallization
4. additionThe aqueous slurry containing the crystals
5. filtrationwas filtered by suction at room temperature