Methods and apparatus for production of natural L-menthol
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United States of America Patent
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Jul 22, 2014
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Feb 17, 2010
filing date -
Feb 17, 2009
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Abstract
Embodiments are provided that provide for efficient production of highly pure natural I-menthol. In some embodiments, a method for preparing natural I-menthol involves providing crude mentha oil in a crystallizer and gradually reducing the temperature of the crystallizer in a step-wise manner, thereby producing highly pure crystals in less than two weeks. The methods disclosed herein are suitable for pharmaceutical GMP.
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