Supercritical CO2 Extraction of Margosa Extract from Neem Seeds
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Solution Overview
Problem
The challenge is to produce a consistent and high-quality margosa extract from neem seeds while minimizing the risk of contamination with mycotoxins, especially aflatoxins, and ensuring the extract's biological effectiveness, which is hindered by the difficulty in maintaining quality during transportation and storage due to fungal growth and the need for importation from tropical regions.
Innovation Solution
The method involves extracting oil from neem seeds using carbon dioxide, followed by pressing, which allows for batch sampling to check aflatoxin contamination and reduces transport risks, enabling production in the seeds' country of origin, ensuring mycotoxin-free and biologically effective neem oil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If neem seeds are imported from tropical regions to industrial countries for extraction, then the extract can be produced with consistent quality, but the risk of contamination with mycotoxins (aflatoxins) increases due to fungal growth during transportation and storage
Solution Approach 1:
The patent applies preliminary action by performing the extraction process in the country of origin (India) before transportation. The neem seeds are extracted with supercritical carbon dioxide at the source, producing a clean extract that is then transported. This eliminates the risk of fungal contamination during sea transport, as the extraction is completed before the material is exposed to tropical transport conditions.
Solution Approach 2:
The patent uses supercritical carbon dioxide extraction to separate and remove the active ingredients (azadirachtin, nimbin, salannin) from the neem seeds. This extraction process isolates the valuable compounds while leaving behind the fungal contamination risk in the seed material, producing a purified extract that can be safely transported and stored.
2Productivity
If neem seeds are stored and transported from tropical regions, then the extract can be produced, but fungal growth occurs leading to mycotoxin contamination
Solution Approach 1:
The extraction is performed as a preliminary action before storage and transport. By completing the extraction process in the country of origin using supercritical CO2, the patent eliminates the need to store and transport large quantities of raw neem seeds, thereby preventing fungal growth and mycotoxin contamination while maintaining productivity.
Solution Approach 2:
The patent changes the physical state and parameters of the extraction medium to supercritical carbon dioxide (high pressure, controlled temperature). This parameter change enables efficient extraction at relatively low temperatures that preserve the active ingredients while preventing fungal growth, allowing productive extraction without the harmful effects of tropical storage conditions.
3Adaptability or versatility
If neem oil is obtained by pressing neem seeds, then the oil can be used for various applications, but the oil develops a garlic-like smell and dark brown color when exposed to air
Solution Approach 1:
The patent replaces the mechanical pressing method with supercritical fluid extraction. Instead of mechanically pressing the seeds to obtain oil, the process uses supercritical carbon dioxide to selectively extract the active ingredients. This substitution eliminates the oxidation problems associated with pressed oil, as the supercritical extraction produces a stable extract without the garlic-like smell and dark coloration that occur when pressed oil is exposed to air.
Solution Approach 2:
The patent changes the extraction parameters by using supercritical carbon dioxide instead of mechanical pressing. The supercritical state (controlled pressure and temperature) allows for selective extraction of active ingredients while avoiding the oxidation and degradation that occur in mechanically pressed oil. The resulting extract maintains stability and does not develop unpleasant odors or discoloration when exposed to air.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This process results in a high-yield, odorless, and stable margosa extract with enhanced repellent properties against house dust mites, maintaining active ingredient content and reducing the risk of contamination, thus ensuring a consistent and effective pest control agent.
Implementation Method 1
Carbon dioxide is used as the extractant in a subcritical or supercritical state
Data Source
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AI summary
The invention relates to a method for producing margosa extract, according to which an oil is obtained from the nuts and/or seeds of the neem tree and the oil is extracted using an extracting agent that contains carbon dioxide. The invention also relates to a margosa extract that is obtained by said method, to the use of said extract as a pest control agent and to a pesticide containing said extract.