Sterol extraction with polar solvent to give low sterol, high triglyceride, microbial oil
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United States of America Patent
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Dec 26, 2000
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N/A
app pub date -
Feb 8, 1999
filing date -
May 15, 1996
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Abstract
The present invention relates to a process of treating an oil, the process comprising contacting the oil with a polar solvent to extract at least one compound that is soluble in the solvent, and then separating the solvent containing the compound from the so treated oil. The oil is microbially derived, and extracted either from a fermentation broth or a filtrate thereof using hexane. The compound to be extracted is usually a sterol or a diglyceride. The solvent is ethanol having up to 5% water. The oil can contain a polyunsaturated fatty acid such as C18, C20 or C22 .omega.-3 or .omega.-6 fatty acid, such as arachidonic acid.
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