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Co-extraction of azadirachtin and neem oil

  • US 5,397,571 A
  • Filed: 03/25/1993
  • Issued: 03/14/1995
  • Est. Priority Date: 03/25/1993
  • Status: Expired due to Term
First Claim
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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.

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