- After a period of reaction, the mixture will settle and separating layers, biodiezen oil stays above and grade glycerol, ethanol residue deposited on the bottom will be left out of the mix. Biodiezen after separation of the oil and other impurities such as glycerol, ethanol, so we carried out the washing to separate impurities. Most contaminants are polar and soluble in water, so I will wash with hot water products.
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