The residual oil was recovered using n-hexane solvent extraction after continuous pressing. Peanuts that had been roasted at 180 °C for 10 min were ground into powder, treated with n-hexane, and agitated at 200 rpm for 2 h. The process of extraction was repeated twice using n-hexane.
What methods are used to extract peanut oil?
This review elucidates the methods used for extracting peanut oil, including mechanical and chemical processes that have been combined with biological or physical pre-treatment techniques. Their primary goals are to maximize oil extraction and unlock the untapped potential of defatted whole peanuts.
Does PDPM extract oil from peanuts?
The oil yield was not evaluated in this study, but the researchers were very interested in utilizing the by-product of this extraction (i.e., the meal), knowing that 70 kg of PDPM was recovered out of 100 kg of peanuts [ 21 ].
What solvent is used to extract peanut oil?
Two different solvents, n-hexane, and petroleum ether, were used. The moisture level of the peanuts used in the experiment was 6.68% d.b. The extraction process was carried out for 8 h at 100 °C with a solvent feeding rate of 4¨C5 drops per second. After the extraction, the peanut oil was distilled and held in an oven at 105 °C for 1 h.