Fuel oil composition

Abstract

The present invention provides a fuel oil composition, including: a fuel oil base oil having a sulfur element content of from 0.01 mass % to 0.50 mass %; and a calcium salicylate having a total base number of from 100 mgKOH/g to 1,200 mgKOH/g.

1 . A fuel oil composition, comprising:
 a fuel oil base oil having a sulfur element content of from 0.01 mass % to 0.50 mass %; and   a calcium salicylate having a total base number of from 100 mgKOH/g to 1,200 mgKOH/g.   
     
     
         2 . The fuel oil composition according to  claim 1 , wherein a content of the calcium salicylate is from 1 ppm by mass to 2,000 ppm by mass with respect to a total amount of the fuel oil composition in terms of calcium element content. 
     
     
         3 . The fuel oil composition according to  claim 1 , wherein the calcium salicylate contains a calcium salt of an alkylsalicylic acid represented by the following general formula (1) or general formula (2): 
       
         
           
           
               
               
           
         
         where R 1  represents a hydrocarbon group having 4 to 32 carbon atoms, and R 2  represents a hydrocarbon group having 4 to 32 carbon atoms. 
       
     
     
         4 . The fuel oil composition according to  claim 1 , wherein a ratio between the sulfur element content in the fuel oil base oil and a calcium element content derived from the calcium salicylate is from 1,000:1 to 0.5:1 in terms of mass ratio. 
     
     
         5 . The fuel oil composition according to  claim 1 , wherein the fuel oil base oil has a kinematic viscosity at 40° C. of from 1 mm 2 /s to 600 mm 2 /s. 
     
     
         6 . The fuel oil composition according to  claim 1 , further comprising a sorbitan ester. 
     
     
         7 . The fuel oil composition according to  claim 1 , wherein the fuel oil composition is a fuel oil composition for a ship. 
     
     
         8 . A method of suppressing deposition of sludge in a fuel oil composition, comprising blending a fuel oil base oil having a sulfur element content of from 0.01 mass % to 0.50 mass % with a calcium salicylate having a total base number of from 100 mgKOH/g to 1,200 mgKOH/g. 
     
     
         9 . The method according to  claim 8 , wherein the fuel oil composition is a fuel oil composition for a ship. 
     
     
         10 . A use of a calcium salicylate having a total base number of from 100 mgKOH/g to 1,200 mgKOH/g for suppressing deposition of sludge in a fuel oil composition comprising a fuel oil base oil having a sulfur element content of from 0.01 mass % to 0.50 mass %. 
     
     
         11 . The use according to  claim 10 , wherein the fuel oil composition is a fuel oil composition for a ship.