US2005119140A1PendingUtilityA1

Method of reducing deposit formation in a centrifuge system in a trunk piston diesel engine

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Priority: Oct 30, 2003Filed: Oct 28, 2004Published: Jun 2, 2005
Est. expiryOct 30, 2023(expired)· nominal 20-yr term from priority
Inventors:Laurent ChambardPhilip Skinner
C10M 2207/023C10N 2040/252C10M 2223/045C10M 169/045C10M 2203/1085C10M 163/00C10M 2219/02C10M 2207/028C10N 2010/04C10N 2030/52C10M 2203/1025C10M 2207/262C10M 2215/28
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Claims

Abstract

A method of reducing deposit formation in a centrifuge system in a trunk piston diesel engine. The method includes the step of lubricating the trunk piston diesel engine with a trunk piston diesel engine lubricant composition having a total base number of more than 40 mg KOH/g, as determined by ASTM D2896, and including: at least 40 mass % of an oil of lubricating viscosity; at least one detergent, preferably at least two detergents; and at least 1.5 mass % of phenol, based on the total amount of the lubricant composition; with the proviso that if the trunk piston diesel engine lubricant composition includes at least one phenate detergent, the trunk piston diesel engine lubricant composition includes more than 1.7 mass %, preferably more than 1.9 mass %, of phenol.

Claims

exact text as granted — not AI-modified
1 . A method of reducing deposit formation in a centrifuge in a trunk piston diesel engine which method comprises lubricating the trunk piston diesel engine with a trunk piston diesel engine lubricant composition having a total base number of more than 40 mg KOH/g, and including: at least 40 mass percent of an oil of lubricating viscosity; at least one detergent; and at least 1.5 mass percent of phenol, based on the total amount of the lubricant composition.  
     
     
         2 . The method of  claim 1  in which the trunk piston diesel engine lubricant composition includes at least one phenate detergent, and the trunk piston diesel engine lubricant composition includes more than 1.7 mass percent of phenol.  
     
     
         3 . The method of  claim 1  in which the phenol is an unreacted component of the detergent.  
     
     
         4 . The method of  claim 1  in which the phenol in the composition is a reacted component of the detergent.  
     
     
         5 . The method of  claim 1  in which part of the phenol in the composition is an unreacted component of the detergent and part of the phenol is a reacted component of the detergent.  
     
     
         6 . The method of  claim 1  in which the phenol is of the formula  
       
         
           
           
               
               
           
         
       
       where R is a hydrocarbyl group and y is 1 to 4; and when y is greater than 1, the hydrocarbyl groups may be the same or different from each other.  
     
     
         7 . The method of  claim 1  in which the phenol is of the formula:  
       
         
           
           
               
               
           
         
       
       where R is a hydrocarbyl group, y is 1 to 4 and x is from 1 to 4; and when y is greater than 1, the hydrocarbyl groups may be the same or different from each other.  
     
     
         8 . The method of  claim 1  in which the detergent has a TBN of at least 60 mg KOH/g.  
     
     
         9 . The method of  claim 1 , the composition having a total base number of at least 45 mg KOH/g.  
     
     
         10 . The method of  claim 1  which also includes at least one of the following: a dispersant, an anti-wear agent, an anti-oxidant, a pour point depressant, an anti-foamant and a demulsifier.  
     
     
         11 . The method of  claim 1  in which the sealing medium is water.

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