Method of preparing .alpha.-l-aspartyl-l-phenylalanine...

Details Method of preparing .alpha.-l-aspartyl-l-phenylalanine... Method of preparing .alpha.-l-aspartyl-l-phenylalanine...

C - Chemistry, Metallurgy

07

K

C07K 5/075 (2006.01) C07K 1/14 (2006.01) C07K 5/072 (2006.01)

Patent

CA 2069256

In neutralizing an acid addition salt of .alpha.-APM in an aqueous medium, the .alpha.-APM concentration in the neutralized liquid is controlled to fall within the range of from 3 to 10 wt.% at the finish of neutralization. Then, the liquid is heated to 50 to 80°C and neutralization is effected with stirring to the isoelectric point of .alpha.-APM; or after the neutralization, the neutralized liquid is heated. The neutralized liquid is thereafter cooled with or without stirring so that crystals of .alpha.-APM are precipitated.

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