METHOD AND SYSTEM FOR PRODUCING LIGHT OLEFINS FROM LOW-QUALITY PETROLEUM PRODUCTS Russian patent published in 2023 - IPC C10G67/04 C10G69/04 C10G21/14 C07C11/02 

FIELD: oil refining.

SUBSTANCE: method for producing light olefins from low-quality petroleum products, including the following stages: introducing a low-quality initial petroleum product into a thermal processing reaction in the presence of hydrogen to obtain a processed product; directing the processed product to the first separation stage to obtain the first separated product; sending the first separated product to the second separation stage to obtain an improved petroleum product and resin; directing the improved petroleum product to further upgrading by hydrogenation to obtain a hydrogenated petroleum product of high quality; directing the hydrogenated petroleum product of high quality to the third separation stage to obtain a hydrogenated heavy petroleum product of high quality; sending the upgraded hydrogenated heavy petroleum product to catalytic cracking to produce a catalytic cracking product containing a light olefin. The invention also relates to a system for producing light olefins from low quality petroleum products.

EFFECT: efficient and environmentally friendly processing of low-quality petroleum product, economical use of low-quality petroleum product for production of light olefins.

21 cl, 4 dwg, 9 tbl, 23 ex