A distillation plant is a facility used to separate mixtures based on differences in boiling points of components. In the context of biodiesel production, distillation is commonly used for purifying and refining the biodiesel product, removing impurities such as excess alcohol, glycerin, and other byproducts. The process typically involves heating the mixture to vaporize the component with the lowest boiling point, then cooling the vapor to condense it back into liquid form. Distillation can also be used in the production of biodiesel from vegetable oils or animal fats, ensuring the final product meets required purity standards for use in engines.