C heavy oil composition and method for producing same

Abstract

The present invention provides a method for producing a C heavy oil composition which unlikely forms sludge, has excellent ignitability and combustibility, and enable the stable operation of a combustion device such as an external combustion device, a diesel device, and a gas turbine device. The method of the present invention is comprises method for producing a C heavy oil composition with a bicyclic aromatic hydrocarbon content of 10 percent by volume or more and 45 percent by volume or less, comprising blending a cracked reformed base oil with a total aromatic content of 80 percent by volume or more and a 15° C. density of 0.90 to 1.20 g/cm 3 in an amount of 1 percent by volume or more and 45 percent by volume or less on the basis of the total mass of the composition.

1 . A method for producing a C heavy oil composition with a bicyclic aromatic hydrocarbon content of 10 percent by volume or more and 45 percent by volume or less, comprising blending a cracked reformed base oil with a total aromatic content of 80 percent by volume or more and a 15° C. density of 0.90 to 1.20 g/cm3 in an amount of 1 percent by volume or more and 45 percent by volume or less on the basis of the total mass of the composition. 
     
     
         2 . The method for producing a C heavy oil composition according to  claim 1 , wherein the cracked reformed base oil has a 50° C. kinematic viscosity of 0.3 to 10 mm2/s, a sulfur content of 8000 mass ppm or less, and a nitrogen content of 100 mass ppm or less. 
     
     
         3 . The method for producing a C heavy oil composition according to  claim 1 , wherein the cracked reformed base oil has a 10 vol. % distillation temperature (T10) of 130 to 270° C., a 50 vol. % distillation temperature (T50) of 190 to 290° C., and a 90 vol. % distillation temperature (T90) of 230 to 390° C. 
     
     
         4 . The method for producing a C heavy oil composition according to  claim 1 , wherein the cracked reformed base oil is produced by bringing a feedstock having a 10 vol. % distillation temperature of 140° C. or higher and a 90 vol. % distillation temperature of 380° C. or lower into contact with a catalyst for a cracking and reforming reaction containing a medium pore zeolite and/or a large pore zeolite to be cracked and reformed through a cracking and reforming reaction at a reaction ternperature of 400 to 650° C. and a reaction pressure of 1.5 MPaG or lower for a contact time of 1 to 300 seconds. 
     
     
         5 . A C heavy oil composition produced by the method for producing a C heavy oil composition according to  claim 1 , wherein it has a 15° C. density of 0.85 to 1.05 g/cm3, a 50° C. kinematic viscosity of 400 mm2/s or lower, a sulfur content of 3.5 percent by mass or less, a nitrogen content of 1 percent by mass or less and a flash point of 70° C. or higher. 
     
     
         6 . The method for producing a C heavy oil composition according to  claim 2 , wherein the cracked reformed base oil has a 10 vol. % distillation temperature (T10) of 130 to 270° C., a 50 vol. % distillation temperature (T50) of 190 to 290° C., and a 90 vol. % distillation temperature (T90) of 230 to 390° C. 
     
     
         7 . The method for producing a C heavy oil composition according to  claim 2 , wherein the cracked reformed base oil is produced by bringing a feedstock having a 10 vol. % distillation temperature of 140° C. or higher and a 90 vol. % distillation temperature of 380° C. or lower into contact with a catalyst for a cracking and reforming reaction containing a medium pore zeolite and/or a large pore zeolite to be cracked and reformed through a cracking and reforming reaction at a reaction temperature of 400 to 650° C. and a reaction pressure of 1.5 MPaG or lower for a contact time of 1 to 300 seconds. 
     
     
         8 . The method for producing a C heavy oil composition according to  claim 3 , wherein the cracked reformed base oil is produced by bringing a feedstock having a 10 vol. % distillation temperature of 140° C. or higher and a 90 vol. % distillation temperature of 380° C. or lower into contact with a catalyst for a cracking and reforming reaction containing a medium pore zeolite and/or a large pore zeolite to be cracked and reformed through a cracking and reforming reaction at a reaction temperature of 400 to 650° C. and a reaction pressure of 1.5 MPaG or lower for a contact time of 1 to 300 seconds. 
     
     
         9 . The method for producing a C heavy oil composition according to  claim 6 , wherein the cracked reformed base oil is produced by bringing a feedstock having a 10 vol. % distillation temperature of 140° C. or higher and a 90 vol. % distillation temperature of 380° C. or lower into contact with a catalyst for a cracking and reforming reaction containing a medium pore zeolite and/or a large pore zeolite to be cracked and reformed through a cracking and reforming reaction at a reaction temperature of 400 to 650° C. and a reaction pressure of 1.5 MPaG or lower for a contact time of 1 to 300 seconds. 
     
     
         10 . A C heavy oil composition produced by the method for producing a C heavy oil composition according  claim 2 , wherein it has a 15° C. density of 0.85 to 1.05 g/cm3, a 50° C. kinematic viscosity of 400 mm2/s or lower, a sulfur content of 3.5 percent by mass or less, a nitrogen content of 1 percent by mass or less and a flash point of 70° C. or higher. 
     
     
         11 . A C heavy oil composition produced by the method for producing a C heavy oil composition according to  claim 3 , wherein it has a 15° C. density of 0.85 to 1.05 g/cm3, a 50° C. kinematic viscosity of 400 mm2/s or lower, a sulfur content of 3.5 percent by mass or less, a nitrogen content of 1 percent by mass or less and a flash point of 70° C. or higher. 
     
     
         12 . A C heavy oil composition produced by the method for producing a C heavy oil composition according to  claim 4 , wherein it has a 15° C. density of 0.85 to 1.05 g/cm3, a 50° C. kinematic viscosity of 400 mm2/s or lower, a sulfur content of 3.5 percent by mass or less a nitrogen content of 1 percent by mass or less and a flash point of 70° C. or higher.