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    • 4. 发明授权
    • Method for crystallizing .alpha.-L-aspartyl-L-phenylalanine methyl ester
    • α-L-天冬氨酰-L-苯丙氨酸甲酯的结晶方法
    • US5347035A
    • 1994-09-13
    • US125193
    • 1993-09-23
    • Hidetoshi WakamatsuTsuneo HaradaYukio KunisawaKiyotaka Oyama
    • Hidetoshi WakamatsuTsuneo HaradaYukio KunisawaKiyotaka Oyama
    • A23L27/30C07K1/14C07K5/06C07K5/072C07K5/075C07C229/00
    • C07K5/0613
    • A method for crystallizing .alpha.-L-aspartyl-L-phenylalanine methyl ester from a hot aqueous solution containing .alpha.-L-aspartyl-L-phenylalanine methyl ester by cooling is disclosed, which comprises (i) continuously supplying a hot aqueous solution of .alpha.-L-aspartyl-L-phenylalanine methyl ester having a concentration such that the content of L-aspartyl-L-aspartyl-L-phenylalanine methyl esters is less than 0.6% by weight based on the weight of .alpha.-L-aspartyl-L-phenylalanine methyl ester in said solution, or if the content of L-aspartyl-L-aspartyl-L-phenylalanine methyl esters is 0.6% by weight or more based on the weight of .alpha.-L-aspartyl-L-phenylalanine methyl ester in said solution, to a crystallization vessel the temperature of which is lowered to that corresponding to the solubility of .alpha.-L-aspartyl-L-phenylalanine methyl ester or less, and (ii) continuously discharging the formed slurry from the crystallization vessel.
    • 公开了一种通过冷却从含有α-L-天冬氨酰-L-苯丙氨酸甲酯的热水溶液中结晶α-L-天冬氨酰基-L-苯丙氨酸甲酯的方法,其包括(i)连续供应热的α水溶液 L-天冬氨酰-L-苯丙氨酸甲酯的浓度使得L-天冬氨酰基-L-天冬氨酰基-L-苯丙氨酸甲酯的含量基于α-L-天冬氨酰-L重量的小于0.6重量% - 苯丙氨酸甲酯,或者如果L-天冬氨酰基-L-天冬氨酰基-L-苯丙氨酸甲酯的含量基于α-L-天冬氨酰基-L-苯丙氨酸甲酯的重量计为0.6重量%以上 所述溶液加到结晶容器中,该结晶容器的温度降低至与α-L-天冬氨酰基-L-苯丙氨酸甲酯的溶解度或更低的溶解度,和(ii)从结晶容器中连续排出形成的浆料。