Process for preparing L-rhamnose
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United States of America Patent
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Jul 19, 1988
Grant Date -
N/A
app pub date -
Dec 22, 1986
filing date -
Nov 26, 1985
priority date (Note) -
Expired
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Abstract
This invention relates to a process for readily and efficiently preparing L-rhamnose with the use of a marine alga belonging to the family Monostromaceae, Ulvales. According to the process of the present invention, rhamnan sulfate is extracted from a marine alga belonging to the family Monostromaceae such as Monostroma nitidium Wittrock and the obtained extract is hydrolyzed by adding acid(s) thereto followed by heating or treating thereof with a cation exchange resin followed by heating to thereby give a solution containing free L-rhamnose. Since the solution thus obtained contains a large amount of salts, the removal of these salts is significantly important in the preparation of L-rhamnose. In the present invention, an effective process therefor is combined with a conventional method by using an ion exchange resin to thereby establish an efficient desalting process. Further it is effective to elevate the purity of L-rhamnose by adding baker's yeast, which selectively ferments various sugars, to the solution containing L-rhamnose.
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