Process for the gentle recovery of extract fractions from hypericum, pharmaceutical preparations containing the same and their use
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United States of America Patent
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May 29, 2001
Grant Date -
N/A
app pub date -
Apr 15, 1999
filing date -
Apr 22, 1998
priority date (Note) -
Expired
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Abstract
A method of preparing an extract fraction of Hypericum perforatum L by preparing an aqueous ethanolic extract of Hypericum perforatum L, concentrating the extract to a predetermined degree by evaporation thus forming a precipitate and a supernatant, repeating the concentrating and separating steps at least once with the supernatant, optionally redissolving the separated precipitate obtained in a previous step and obtaining a product extract of Hypericum perforatum L from one of the supernatant or the precipitate of the step wherein the precipitate and supernatant are formed or the redissolved precipitate of the proceeding step.
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