Test to check Percentage of oil extracted from fish meal, kelp, linseed, rapeseed by subcritical extraction

Subcritical extraction is an extraction technique that utilises a subcritical fluid as the extractant. This technique is commonly used to extract oils and fats from plant seeds, animal fats and other similar substances. Advantages of subcritical extraction include lower energy consumption, less residual solvent and better product quality.
Steps and analysis of subcritical extraction experiment:
Experiment name: Percentage of oil extracted from fish meal, kelp, linseed, rapeseed by subcritical extraction
Purpose of the experiment: to study the ratio and feasibility of oil extraction from fish meal, kelp, linseed and rapeseed by subcritical extraction.
Experimental principle: Subcritical extraction is an extraction technique that uses subcritical fluid as the extractant. In the subcritical state, the solubility difference between the extractant and the extracted substance is small, which enables efficient extraction. In this experiment, butane was used as the extractant to take advantage of its lower energy consumption, less residual solvent and better product quality.
Experimental steps:
1. Prepare the experimental materials: fish meal, kelp, linseed, rapeseed, butane, extraction equipment, scales and so on.
2. Dry the fish meal, kelp, linseed and rapeseed separately for better contact with the extractant.
3. injecting the extractant and into the extraction equipment.
4. adding the substances to be extracted into the extraction equipment and extracting them under certain temperature and pressure.
5. collects the oil and grease obtained from the extraction and measures its mass using a balance.
6. analyse the experimental data, including the extraction rate of oil and grease and the quality of oil and grease.
Experimental results:
1. after subcritical extraction, the highest quality of oils and fats were extracted from rapeseed, followed by linseed, red fishmeal, white fishmeal and kelp.
2. The experimental results showed that subcritical extraction can be effective in extracting oils and fats from these substances under appropriate process conditions.
3. In addition, butane as an extractant has good solubility and low residual solvent, which has less effect on product quality.
4. The different properties of the substances also affect the oil extraction rate. For example, oilseed rape has a higher fat content and therefore a higher extraction rate. And the fat content in kelp is lower, so the extraction rate is also lower.
6. Combining the experimental results and analyses, it can be concluded that subcritical extraction is an effective method of oil and fat extraction, which is suitable for extracting oil and fat from a variety of substances. Meanwhile, the oil and fat extraction rate and product quality can be improved by optimising the process conditions and improving the efficiency of the equipment.