Co-extraction of azadirachtin and neem oil
First Claim
1. A solid neem product having greater than 10 weight percent of azadirachtin and being prepared by(a) extracting neem seeds with a co-solvent mixture of a polar solvent and a nonpolar, aliphatic hydrocarbon solvent to obtain a co-solvent neem extract;
- (b) removing the solvent from the co-solvent neem extract to recover a neem extract mixture;
(c) contacting the neem extract mixture with a solvent having a sufficiently low polarity to precipitate a solid having an azadirachtin content of greater than 10 weight percent.
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Accused Products
Abstract
Disclosed is an improved method of extracting neem seeds. The method involves co-solvent extracting neem seeds with a solvent mixture of a nonpolar, aliphatic hydrocarbon solvent and a polar solvent to simultaneously remove the hydrophilic and hydrophobic extracts from the neem seeds. The method provides novel neem extract mixtures which contain both the hydrophobic and hydrophilic portion Of the neem seeds. The extract mixtures may be further extracted to yield an azadirachtin-containing solid product having greater than 10 weight percent of azadirachtin.
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Citations
6 Claims
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1. A solid neem product having greater than 10 weight percent of azadirachtin and being prepared by
(a) extracting neem seeds with a co-solvent mixture of a polar solvent and a nonpolar, aliphatic hydrocarbon solvent to obtain a co-solvent neem extract; -
(b) removing the solvent from the co-solvent neem extract to recover a neem extract mixture; (c) contacting the neem extract mixture with a solvent having a sufficiently low polarity to precipitate a solid having an azadirachtin content of greater than 10 weight percent. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification