You have two basic options. I'm going to assume that whatever oil you're trying to separate from the alcohol is highly volatile (like fragrant essential oils from plant material). Both methods require a little bit of time.
If you want the alcohol, what you can do is use an alembic (home-made or otherwise) to capture the naturally evaporating alcohol. Thin copper tubing works best. You can place a lid on a container with the alcohol/oil mixture and run that through a cooling medium (like another container filled with ice) and into another sealed container that sits lower than the one with your mixture.
Oil and alcohol can be separated by using a separation technique called fractional distillation. This method relies on the different boiling points of oil and alcohol. By heating the mixture and collecting the vapors at different temperatures, the components can be separated based on their boiling points.
Yes, oil can dissolve in alcohol because both substances are nonpolar in nature. The nonpolar nature of oil allows it to mix well with nonpolar solvents like alcohol. However, the solubility of oil in alcohol may vary depending on the type of oil and alcohol.
distillation
Oil is heavier than alcohol because oil has a higher density. Density is a measure of how closely packed the molecules are in a substance, and oil molecules are generally more tightly packed than alcohol molecules.
No, Isopropyl alcohol does not contain oil. It is a type of alcohol that is typically used as a solvent or cleaning agent due to its ability to dissolve substances like oils, so it is oil-free.
spin it out! - Oil will come to the top
It depends on the proportions and which of the liquids you need at the end. The likelihood is that the alcohol will have emulsified the oil and water so the starting material will have no layers. The method often used to separate mixtures of liquids is fractional distillation, though it's not possible to produce completely pure alcohol by this method. If you don't need the water you can first remove it with a drying agent.
Because alcohol (assuming you mean ethanol) is a polar molecule, the energy needed to separate the hydrogen bonds so that the vegetable oil can slide between them is far greater then the attraction between ethanol and the nonpolar oil. Therefore, on addition of Vegetable oil into alcohol the two will separate into two distinct layers.
Alcohol is it's own separate entity.
Water, ethyl alcohol, propyl alcohol, oil. Water has the highest specific gravity followed by ethyl alcohol, propyl alcohol, and oil, which has the lowest specific gravity.
Yes, oil can dissolve in alcohol because both substances are nonpolar in nature. The nonpolar nature of oil allows it to mix well with nonpolar solvents like alcohol. However, the solubility of oil in alcohol may vary depending on the type of oil and alcohol.
Because ice is denser than the oil and alcohol.
No.
distillation
Oil is heavier than alcohol because oil has a higher density. Density is a measure of how closely packed the molecules are in a substance, and oil molecules are generally more tightly packed than alcohol molecules.
No
The gearbox oil is separate from the engine oil on a 2002 1.4 Astra, and much thicker.
No because alcohol is polar and only polar chemicals mix with other polar chemcials. Oil is not polar, making it unable to mix with alcohol. I think actually most or all types of alcohol do mix with oil. I am not certain about every type but the ethanol (the kind in adult beverages) molecule has a polar end and a nonpolar end. Isopropyl alcohol also dissolves oil. That ethanol mixes with both alcohol and water has an interesting application. Spirits such as ouza are almost pure ethanol and aromatic oils. When it is poured into water the ethanol is soluable but the aromatic oils are not and a cloudy white emulsion of water/ethanol with oil dropletts is formed. This effect is called louching. Another spirit that does this is arak and to a lesser extent absinthe. I think perfumes that are alcohol and oils should do this too.