Document Type and Number:
Japanese Patent JPH0587501
Kind Code:
B2
Abstract:
N-Benzyloxycarbonyl-L-aspartic acid (Z-Asp) crystals several times larger than those obtained by conventional crystallization are prepared by acidifying an alkaline aqueous solution of a metal salt of Z-Asp at high temperatures of between about 20 DEG to 45 DEG C. The resulting large crystals contain less moisture and less impurities such as sodium chloride, dipeptide and benzyl alcohol, etc. than those crystals obtained at lower temperatures and they are easily processed for preparing aspartame.
Inventors:
KEI MINGU UAN
MEARII SHUIICHUI CHEN
KUREI TSUUCHIMU CHEN
MEARII SHUIICHUI CHEN
KUREI TSUUCHIMU CHEN
Application Number:
JP17688584A
Publication Date:
December 16, 1993
Filing Date:
August 27, 1984
Export Citation:
Assignee:
HATOKO CHEM CORP
International Classes:
A23L27/30; C07C67/00; C07C271/22; C07C239/00; C07C269/08; (IPC1-7): C07C271/22
Next Patent: DEVICE FOR DETECTING POSITION OF MOVING BODY