Crystallization of .alpha.-L-aspartyl-L-phenylalanine methyl ester from aqueous solution
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United States of America Patent
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Mar 31, 1998
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Jun 28, 1996
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Jun 30, 1995
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Abstract
Improved method for crystallization of .alpha.-L-aspartyl-L-phenylalanine methyl ester (aspartame) from an aqueous solution by conductive cooling while avoiding turbulence in the crystallizing system wherein crystallization is carried out with cooling to a temperature level not lower than 10.degree. C. in the presence of at least 0.1% by weight of a C.sub.3-8 ketone, the amount of ketone and the temperature level being chosen for each individual ketone so that a homogeneous solvent system is present at the start of crystallization and an open drainable network of aspartame crystals is obtained.
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