Natamycin recovery
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United States of America Patent
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Jan 7, 1997
Issued Date -
N/A
app pub date -
May 3, 1994
filing date -
Dec 7, 1990
priority date (Note) -
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Abstract
A process for the recovery of high purity natamycin from fermentaion broth by extraction with methanol is disclosed. In one embodiment the process comprises the steps: (1) adding methanol to a natamycin feed stream comprising at least 2 g/L of solid suspended natamycin to form an extraction medium, and maintaining the extraction medium at a temperature of 0.degree.-25.degree. C., preferably not over 15.degree. C.; (2) adjusting the pH of the extraction medium to 1.0 to 4.5 while maintaining the temperature at 0.degree.-25.degree. C. for 0.5 to 30 hours, but preferably not over 0.5 hours when the temperature is 15.degree.-25.degree. C.; (3) removing solids from the extraction medium to form an extraction liquor; (4) raising the pH of the extraction liquor to 6.0-9.0; and (5) recovering precipitated natamycin.
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