The main raw material for the production of biodiesel is refined vegetable oil or waste from the refining of an oil refinery (saponins, oil sludge, distillation after deodorization, clay waste, etc.). mainly transformed oxidized oil, the price of oxidized oil is about 1/3 the price of vegetable oil. Thus, using oxidized oil or crude fatty acids as feedstock for biodiesel production has more advantages than using vegetable oil, but also avoids the problem of environmental pollution by the vegetable oil plant, is a double benefit.
In fact, biodiesel is a mixture of ethers, mainly methyl ether, as a result of a chemical reaction. Its advantages include: