What is by product of petroleum?

By-products of petroleum include a variety of substances generated during the refining process, such as asphalt, kerosene, and petrochemical feedstocks. Additionally, lighter fractions like gasoline and diesel fuel are extracted, while heavier residues can be used for lubricants and waxes. Other by-products may include sulfur and various gases, depending on the refining methods employed. These by-products are crucial for various industrial applications and everyday products.