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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

EFFECT OF PHYSICOCHEMICAL PROPERTIES OF SOLVENTS ON CLAVULANIC ACID EXTRACTION FROM FERMENTATION BROTH

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Author(s):
Brites, L. M. [1] ; Oliveira, J. H. [1] ; Barboza, M. [1] ; Hokka, C. O. [1]
Total Authors: 4
Affiliation:
[1] Univ Fed Sao Paulo, Dept Chem Engn, Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: LATIN AMERICAN APPLIED RESEARCH; v. 42, n. 1, p. 65-70, JAN 2012.
Web of Science Citations: 2
Abstract

A study was made of the extraction of clavulanic acid (CA) from a fermented medium and its concentration and purification. The fermented broth was obtained by cultivation of Streptomyces clavuligerus in complex medium containing glycerol as the Carbon and energy source, and soybean protein isolate as the Nitrogen source. The extraction steps proposed here were evaluated from the standpoint of Yield, purification factor and concentration factor. The extractions were carried out with ethyl acetate, butyl acetate, 2-butanol, n-butanol and methyl isobutyl ketone. The distribution coefficient was related to the solvent properties and it was found that distribution coefficient is directly proportional to the product of the dielectric constant, with solubility. It was observed that extraction with butanol leads to a higher distribution coefficient than ethyl acetate; however, the higher solubility of water in butanol impairs the final precipitation of clavulanic acid. The optimal condition with ethyl acetate occurs at pH 1.63, yielding an extraction factor of 35.6% with a distribution coefficient of 0.73. (AU)

FAPESP's process: 05/55079-4 - Production and purification of clavulanic acid, cephamycin C and other bioactive metabolites of Streptomyces
Grantee:Carlos Osamu Hokka
Support Opportunities: Research Projects - Thematic Grants