Method for preparing and conditioning granular burdock roots through combined uniform drying by using radio frequency pretreatment and microwave pulse spouting
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United States of America Patent
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Jan 19, 2016
Grant Date -
Mar 26, 2015
app pub date -
May 7, 2014
filing date -
Sep 25, 2013
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Abstract
A method for preparing and conditioning granular burdock through combined uniform drying by using radio frequency (RF) pretreatment and microwave pulse spouting is provided. The process of the present disclosure includes performing pretreatment on fresh burdock, protecting color, pre-drying by RF, drying through microwave pulse spouting, and packaging. The color and luster of a product are greatly improved after color protection, the RF pre-drying treatment may be performed for 20 minutes, and hot air drying treatments for removing moisture on the surface may be performed for 60 minutes. The method has a short drying time and high efficiency. The sectional microwave pulse spouting treatment needs 60 minutes totally, while the complete hot air drying treatment needs 400 minutes. Therefore the drying time of the method is greatly shortened, and the drying is uniform, and a sample after microwave pulse spouting drying has strong fragrance.
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