Jx Nippon Oil Energy Corporation

Chiyoda Corporation

Akira Utatsu

Shinichiro Yanagawa

Yasuyuki Iwasa

Ryoji Ida

Atsushi Fukui

Susumu Yasui

Yoshishige Sugi

Masahide Kobayashi

Yuichiro Fujiyama

A method for producing xylene from feedstock oil includes a cracking/reforming reaction step of bringing the feedstock oil into contact with a catalyst to produce monocyclic aromatic hydrocarbons; a separation/recovery step of separating and recovering, from a product obtained by the cracking/reforming reaction step, a fraction A containing monocyclic aromatic hydrocarbons having a 10 vol % distillation temperature of 75&#xb0; C. or higher and a 90 vol % distillation temperature of 140&#xb0; C. or lower, a xylene fraction containing xylene, and a fraction B containing monocyclic aromatic hydrocarbons having a 10 vol % distillation temperature of 145&#xb0; C. or higher and a 90 vol % distillation temperature of 215&#xb0; C. or lower; and a xylene conversion step of bringing a mixed fraction obtained by mixing the fractions A and B with each other into contact with a catalyst containing a solid acid to convert the mixed fraction into xylene.

Method for producing xylene

The present method for producing monocyclic aromatic hydrocarbons is a method for producing monocyclic aromatic hydrocarbons having 6 to 8 carbon atoms. This method includes a cracking and reforming reaction step of bringing oil feedstock into contact with a catalyst to cause a reaction and obtain a product containing monocyclic aromatic hydrocarbons having 6 to 8 carbon atoms and a heavy fraction having 9 or more carbon atoms, a purification and recovery step of purifying and recovering the monocyclic aromatic hydrocarbons having 6 to 8 carbon atoms separated from the product formed by the cracking and reforming reaction step, and a first returning step of returning at least a portion of toluene obtained by the purification and recovery step to the cracking and reforming reaction step.

Method for producing monocyclic aromatic hydrocarbons

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Fujisawa, Japan

Akira Utatsu