METHOD FOR PRODUCING MONOCYCLIC AROMATIC HYDROCARBON

摘要

PROBLEM TO BE SOLVED: To provide a method for producing monocyclic aromatic hydrocarbons capable of producing 6-8C monocyclic aromatic hydrocarbons in high yield from oil feedstock containing polycyclic aromatic hydrocarbons.

SOLUTION: The method for producing monocyclic aromatic hydrocarbons includes: a decomposition reforming reaction step of bringing oil feedstock into contact with a catalyst to react them with each other for obtaining a product; a catalyst separation step of separating and removing the catalyst and tricyclic aromatic hydrocarbons contained in the product from a mixture comprising the product, which is derived from the decomposition reforming reaction step, and the catalyst slightly accompanying the product; a separation step of separating at least 6-8C monocyclic aromatic hydrocarbons and a ≥9C heavy distillate from a derivative derived from the catalyst separation step; a purification and recovery step of purifying and recovering the 6-8C monocyclic aromatic hydrocarbons separated in the separation step; and a recycle step of returning the ≥9C heavy distillate separated in the separation step to the decomposition reforming reaction step.

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