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close this bookCase Studies of Neem Processing Projects Assisted by GTZ in Kenya, Dominican Republic, Thailand and Nicaragua (GTZ, 2000, 152 p.)
close this folder2. Survey of neem-processing methods
close this folderExtraction technologies
View the document(introduction...)
View the documentA) Extraction with alcohol (also called one-step extraction)
View the documentB) Refined neem extracts - AZADIRACHTIN-ENRICHED EXTRACTS (also called two-step extraction plant)
View the documentC) Extraction using centrifuges
View the documentD) Extraction with Supracritical CO2

C) Extraction using centrifuges

This technology is used to produce high quality oils. In a further extraction step it can be used to gain azadirachtin. In a pilot plant a powder containing 15% azadirachtin has been gained from the cake.

Investment costs: approx. US$ 3.5 - 5 million for a complete plant with an annual capacity of more than 2000 t of neem kernels.


· efficient exploitation of azadirachtin
· stable powder product
· neem oil, free of bitter principles
· technology can be used for other oils (e.g. castor oil, etc.)


· very high investment costs
· only profitable on a large scale
· complicated technology
· no experience concerning scaling with neem
· additional solvents are required.