What is oil refaining?
It's oil refining not refaining. Oil as it comes from the ground is called "crude oil." Crude oil contains many different constituents such as gasoline, motor oil, diesel oil, kerosene, other lubricating oils, propane, etc. Separating these different parts of the oil is called "cracking." Refining is putting crude oil in "cracking towers" where the different constituents are separated.
Cracking towers are like tall tubes standing several stories high. in the bottom of the tube crude oil is heated and turned into vapor. As the heated vapor rises in the tube it get cooler and cooler. As it cools, the different constituents of the vapor turn back into liquid at different temperatures. There are buckets at different levels of the tube (different temperatures) to collect the different liquids.
Royal, roil, 1 syllable: boil, boyle, coil, coile, coyle, croyle, Doyle, foil, foyle, hoyle, moyl, moyle, oil, roil, royle, soil, spoil, toil 2 syllables: bath oil, birch oil, bog soil, bone oil, britoil, choke coil, coal oil, cod oil, corn oil, crude oil, embroil, field coil, fish oil, fixed oil, gas oil, gatoil, gold foil, guilfoil, hair oil, lard oil, leaf soil, lukoil, night soil, o'boyle, palm oil, rape oil, recoil, rock oil, rose oil…
I may not understand your question. All rock oil (petroleum), the kind of oil pumped out of the ground from which gasoline and kerosene are made, is inorganic. However, there are many useful organic oils, pressed from the seeds or fruits of plants, such as olive oil, soybean oil,cottonseed oil, linseed oil, canola oil, coconut oil, peanut oil, safflower oil, castor oil and others.