Process for obtaining a tannin extract isolated from grapes, tannin extract obtained and uses thereof
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United States of America Patent
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Apr 23, 2024
Grant Date -
Apr 23, 2020
app pub date -
May 23, 2017
filing date -
May 24, 2016
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Abstract
A process for obtaining a tannin extract isolated from whole grape seeds is provided. The process is performed in as a one-pot reaction and in a single extraction step, wherein the seeds are processed without grinding or milling. Also provided is a tannin extract with improved antioxidant and light fastness properties obtained from whole grape seeds that includes a mixture of tannins and non-tannins, in which the content of tannins or polyphenols is higher than 50%. Ise, the tannin extract isolated from whole grape seeds can include a coloring agent.
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