| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing xylene capable of selectively producing particularly xylene among highly value-added 6-8C monocyclic aromatic hydrocarbons. <P>SOLUTION: The method for producing xylene involves producing xylene from an oil feedstock having a 10 vol.% distillation temperature of not lower than 135°C and a 90 vol.% distillation temperature of not higher than 380°C. The method comprises: a decomposition reforming reaction step in which a monocyclic aromatic hydrocarbons are produced by bringing the oil feedstock into contact with a catalyst; a separation and recovery step in which a fraction A, which contains a monocyclic aromatic hydrocarbons with a 10 vol.% distillation temperature of not lower than 75°C and a 90 vol.% distillation temperature of not higher than 140°C, a xylene fraction containing xylene, and a fraction B, which contains a monocyclic aromatic hydrocarbons with a 10 vol.% distillation temperature of not lower than 145°C and a 90 vol.% distillation temperature of not higher than 215°C, are separated and recovered from the product produced in the decomposition reforming reaction step; and a xylene conversion step in which a mixed fraction that is obtained by mixing the fraction A and fraction B is converted to xylene by bringing the mixed fraction into contact with a catalyst containing a solid acid. <P>COPYRIGHT: (C)2013,JPO&INPIT |
