Catalyst for producing monocyclic aromatic hydrocarbons, and method for producing monocyclic aromatic hydrocarbons

Abstract

A catalyst for producing monocyclic aromatic hydrocarbons, used for producing monocyclic aromatic hydrocarbons of 6 to 8 carbon number from a feedstock oil having a 10 volume % distillation temperature of at least 140° C. and an end point temperature of not more than 400° C., wherein the catalyst contains a crystalline aluminosilicate, gallium and/or zinc, and phosphorus, the molar ratio between silicon and aluminum (Si/Al ratio) in the crystalline aluminosilicate is not more than 100, the molar ratio between the phosphorus supported on the crystalline aluminosilicate and the aluminum of the crystalline aluminosilicate (P/Al ratio) is not less than 0.01 and not more than 1.0, and the amount of gallium and/or zinc is not more than 1.2% by mass based on the mass of the crystalline aluminosilicate.

1 . A catalyst for producing monocyclic aromatic hydrocarbons, used for producing monocyclic aromatic hydrocarbons of 6 to 8 carbon number from a feedstock oil having a 10 volume % distillation temperature of at least 140° C. and an end point temperature of not more than 400° C., wherein
 the catalyst comprises a crystalline aluminosilicate, gallium and/or zinc, and phosphorus, a molar ratio between silicon and aluminum (Si/Al ratio) in the crystalline aluminosilicate is not more than 100, a molar ratio between phosphorus supported on the crystalline aluminosilicate and aluminum within the crystalline aluminosilicate (P/Al ratio) is not less than 0.01 and not more than 1.0, and an amount of gallium and/or zinc is not more than 1.2% by mass based on the mass of the crystalline aluminosilicate. 
 
     
     
         2 . The catalyst for producing monocyclic aromatic hydrocarbons according to  claim 1 , wherein an amount of phosphorus is within a range from 0.1 to 10% by mass based on total mass of the catalyst, and an amount of gallium and/or zinc contained within the catalyst is not more than 2% by mass based on total mass of the catalyst. 
     
     
         3 . The catalyst for producing monocyclic aromatic hydrocarbons according to  claim 1 , wherein the crystalline aluminosilicate is a pentasil-type zeolite. 
     
     
         4 . The catalyst for producing monocyclic aromatic hydrocarbons according to  claim 1 , wherein the crystalline aluminosilicate is an MFI-type zeolite. 
     
     
         5 . The catalyst for producing monocyclic aromatic hydrocarbons according to  claim 1 , wherein a molar ratio between phosphorus supported on the crystalline aluminosilicate and aluminum within the crystalline aluminosilicate (P/Al ratio) is not more than 0.5. 
     
     
         6 . The catalyst for producing monocyclic aromatic hydrocarbons according to  claim 1 , wherein an amount of gallium and/or zinc is not more than 1.0% by mass based on a mass of the crystalline aluminosilicate. 
     
     
         7 . A method for producing monocyclic aromatic hydrocarbons of 6 to 8 carbon number, the method comprising bringing a feedstock oil having a 10 volume % distillation temperature of at least 140° C. and an end point temperature of not more than 400° C. into contact with the catalyst for producing monocyclic aromatic hydrocarbons according to  claim 1 . 
     
     
         8 . A method for producing monocyclic aromatic hydrocarbons of 6 to 8 carbon number, the method including bringing a feedstock oil having a 10 volume % distillation temperature of at least 140° C. and a 90 volume % distillation temperature of not more than 350° C. into contact with the catalyst for producing monocyclic aromatic hydrocarbons according to  claim 1 . 
     
     
         9 . The method for producing monocyclic aromatic hydrocarbons of 6 to 8 carbon number according to  claim 7 , wherein a cracked gas oil produced in a fluid catalytic cracking is used as the feedstock oil. 
     
     
         10 . The method for producing monocyclic aromatic hydrocarbons of 6 to 8 carbon number according to  claim 7 , wherein the feedstock oil is brought into contact with the catalyst for producing monocyclic aromatic hydrocarbons in a fluidized bed reactor. 
     
     
         11 . The method for producing monocyclic aromatic hydrocarbons of 6 to 8 carbon number according to  claim 8 , wherein a cracked gas oil produced in a fluid catalytic cracking is used as the feedstock oil. 
     
     
         12 . The method for producing monocyclic aromatic hydrocarbons of 6 to 8 carbon number according to  claim 8 , wherein the feedstock oil is brought into contact with the catalyst for producing monocyclic aromatic hydrocarbons in a fluidized bed reactor.