A refinery is an industrial facility where raw materials, such as crude oil or natural gas, are processed and transformed into useful products. The primary goal of a refinery is to separate and purify these materials into various fuels, chemicals, and other valuable substances. Common products include gasoline, diesel, jet fuel, and heating oil. Refineries use a variety of techniques, including distillation and chemical reactions, to achieve this transformation. The process involves several stages, each designed to remove impurities and enhance the quality of the final products. Refineries play a crucial role in the energy sector and contribute significantly to the economy.