METHODS FOR INCREASING TOTAL OUTPUT OF AROMATIC HYDROCARBONS AND XYLENES IN COMPLEX PRODUCTION OF AROMATIC HYDROCARBONS Russian patent published in 2019 - IPC C07C6/12 C07C7/04 C07C5/367 C07C15/08 

FIELD: chemistry.

SUBSTANCE: invention relates to a method increase of total output of xylenes in complex production of aromatic hydrocarbons. Method includes the following stages: separating the aromatic hydrocarbon-enriched reforming product into a first hydrocarbon stream containing C₇- hydrocarbons, a second hydrocarbon stream containing C₈-C₁₀ aromatic hydrocarbons, and third hydrocarbon stream containing C₁₀+ aromatic hydrocarbons; isomerisation of a second stream of hydrocarbons containing C₈-C₁₀ aromatic hydrocarbons, to form isomerisation product stream C₈-C₁₀; passing isomerisation product stream C₈-C₁₀ into a naphthene hydrocarbon dehydrogenation zone to obtain a stream of products of the dehydrogenation region of naphthene hydrocarbons; separation of product stream of dehydrogenation zone of naphthene hydrocarbons into first stream of products of dehydrogenation zone of naphthene hydrocarbons containing C₇- hydrocarbons, and a second stream of products of the dehydrogenation region of naphthene hydrocarbons containing C₈+ aromatic hydrocarbons; and passing a second stream of products of the dehydrogenation region of naphthene hydrocarbons containing C₈+ aromatic hydrocarbons, to xylene extraction section or transalkylation zone.

EFFECT: use of the disclosed method increases output of para-xylene.

8 cl, 2 dwg, 1 tbl, 1 ex