C - Chemistry – Metallurgy – 07 – K
Patent
C - Chemistry, Metallurgy
07
K
530/5.06, 530/1.
C07K 5/06 (2006.01) C07K 1/14 (2006.01) C07K 5/072 (2006.01)
Patent
CA 2017137
- 14 - (14) AE 6335 A B S T R A C T A method for crystallizing .alpha.-L-aspartyl-L-phenyl- alanine methyl ester, which comprises mixing a hot aqueous solution containing .alpha.-L-aspartyl-L-phenylalanine methyl ester and a cold aqueous solution which may contain .alpha.-L-aspartyl-L-phenylalanine methyl ester, in such proportions that the concentration of .alpha.-L-aspartyl-L- phenylalanine methyl ester after mixing exceeds its solubility in the mixture of the two aqueous solutions at the temperature of the mixture, to precipitate crystals of .alpha.-L-aspartyl-L-phenylalanine methyl ester, and if necessary, cooling the mixture, the total amount of .alpha.-L-aspartyl-L- phenylalanine methyl ester contained in the hot and cold aqueous solutions being such that when the two aqueous solutions are mixed to precipitate crystals of .alpha.-L-aspartyl- L-phenylalanine methyl ester, it exceeds the solubility level of .alpha.-L-aspartyl-L-phenylalanine methyl ester in the mixture of the two aqueous solutions at the temperature of the mixture.
Irino Shigeaki
Kunisawa Yukio
Stoelwinder Christiaan Johannes Cornelis
Toussaint Antoon Gerard Theodoor
Wakamatsu Hidetoshi
Fetherstonhaugh & Co.
Holland Sweetener Company V.o.f.
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