Process for producing crystals of salt of acidic amino acid and basic amino acid
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United States of America Patent
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Jul 13, 1993
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N/A
app pub date -
Sep 30, 1991
filing date -
Sep 28, 1990
priority date (Note) -
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Abstract
Disclosed is a process for producing crystals of a salt of an acidic amino acid and a basic amino acid, which comprises adding a water-miscible solvent to an aqueous solution of the salt to prepare a solution 90% or more saturated or supersaturated with the salt, heating the resultant solution under reflux until the formation of crystals stops, adding gradually a water-miscible solvent to the solution under reflux to form crystals of the salt, and recovering the crystals from the resultant mixture.
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