Good evening,
I am looking for methods according following topic:
Vegetable oil (raps) contaminated with hydrocarbons (e.g. motor oil) shall be purified and separated from hydrocarbons. (Usage for in-situ soil remediation)
Thank you all in advance, I am looking forward to your ideas and suggestions.
BR Paul
Is this a real task or a theoretical question? How much money you wiling to spend?
First you have to analyse the contaminated oil.
There are "a lot" of hydrocarbons an so many/much ways to process!
Then you can choose a way - if even possible to use the seed-oil for food anyway.
Vegetable oil boils at 300ºC; mineral oil at 349ºC. You should be able to get separation through fractional distillation, though you would have to aware of the high temps of evaporation. Doing the distillation under vacuum would help keep separation temps lower and reduce the danger of high temp oil processes. But now be aware of proper vacuum distillation techniques.
Not familiar. Can you explain the technique? Oxygenated oil degrades quickly...
First of all - thank you for your answers and ideas!
Bernd Janisch: This is more or less a theoretical question, however there is a project from my lecture ongoing for in-situ purification of contaminated soil (information so far: increased hydrocarbon index and PAH) with vegetable oil. The task is to find methods for an appropriate extraction of the hydrocarbons from the recovered vegetable oil. I am thinking of the usage of activated carbons for the removal of PAH or extractions with solvents (e.g. Ethanol). Currently I am looking for alternative possibilities for my further investigations.
Steven Koecher: Thank you very much for the information!
Mohammed Jaafar Ali Alatabe: Thank you for this input. Do you already have experience with this technique or a reference?
1. Vegetable oils are easily esterified and then separated by destillation. I once run a rerefinery. We got many different kind of oil mixtures. We precipitated trybophysical additive and we estryfied the vegetable oil and low boiling petrochemical oils to use them to heat the reactors/crackers.
2. You can also separate by Gas or liquid chromatography
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