Turbine oil composition method for making thereof

Abstract

Provided are formulations, methods of making, and methods of using one or more isomerized base oils in a turbine oil composition to enhance thermal and oxidative stability of the oil, as well as to improve the performance of an industrial turbine housing the turbine oil composition. The isomerized base oil having consecutive numbers of carbon atoms and has less than 25 wt % naphthenic carbon by n-d-M. The turbine oil composition has a viscosity index of greater than about 150.

1 . A turbine oil composition comprising an admixture of: 
 (a) a major amount of at least an isomerized base oil having consecutive numbers of carbon atoms and has less than 25 wt % naphthenic carbon by n-d-M; and    (b) a minor amount of one or more standard turbine oil additive packages;    wherein the turbine oil composition has a viscosity index of greater than about 150.    
     
     
         2 . The composition of  claim 1 , wherein isomerized base oil has consecutive numbers of carbon atoms and has less than 10 wt % naphthenic carbon by n-d-M.  
     
     
         3 . The composition of  claim 1 , wherein isomerized base oil is a Fischer-Tropsch derived base oil made from a waxy feed.  
     
     
         4 . The composition of  claim 1 , wherein isomerized base oil has an average molecular weight between 600 and 1100, and an average degree of branching in the molecules between 6.5 and 10 alkyl branches per 100 carbon atoms.  
     
     
         5 . The composition of  claim 1 , wherein the isomerized base oil has a wt % Noack volatility between 0 and 100.  
     
     
         6 . The composition of  claim 1 , wherein the isomerized base oil has a ratio of weight percent molecules with monocycloparaffinic functionality to weight percent molecules with multicycloparaffinic functionality of greater than 15.  
     
     
         7 . The composition of  claim 1 , wherein the isomerized base oil is made from a process in which the highly paraffinic wax is hydroisomerized using a shape selective intermediate pore size molecular sieve comprising a noble metal hydrogenation component, and under conditions of about 600° F. to 750° F. and wherein the isomerized base oil has a Noack volatility of less than 50 weight %.  
     
     
         8 . The composition of  claim 1 , wherein the at least an isomerized base oil is greater than about 60 wt. %, based on the total weight of the turbine oil composition.  
     
     
         9 . The composition of  claim 8 , wherein the at least an isomerized base oil is greater than about 80 wt. %, based on the total weight of the turbine oil composition.  
     
     
         10 . The composition of  claim 9 , wherein the at least an isomerized base oil is greater than about 90 wt. %, based on the total weight of the turbine oil composition.  
     
     
         11 . The composition of  claim 10 , wherein the at least an isomerized base oil is greater than about 90 wt. %, based on the total weight of the turbine oil composition.  
     
     
         12 . The composition of  claim 1  having a viscosity index of greater than about 153.  
     
     
         13 . The composition of  claim 12 , having a viscosity index of greater than about 160.  
     
     
         14 . The composition of  claim 1 , having a flash point of greater than about 236° C., as measured using ASTM D92.  
     
     
         15 . The composition of  claim 14 , having a flash point of greater than about 245° C., as measured using ASTM D92.  
     
     
         16 . The composition of  claim 1 , having an autoignition temperature of greater than about 360° C., as measured using ASTM E 659 (Rev. 2005).  
     
     
         17 . The composition of  claim 16 , having an autoignition temperature of greater than about 370° C., as measured using ASTM E 659 (Rev. 2005).  
     
     
         18 . The composition of  claim 1 , wherein the one or more standard turbine oil additive packages comprise one or more materials selected from: antioxidants, wear inhibitors, demulsifiers, antifoamants, and rust/corrosion inhibitors.  
     
     
         19 . The composition of  claim 20 , wherein the one or more standard turbine oil additive packages further comprise one or more materials selected from: detergents, ashless dispersants, viscosity index improvers, friction modifiers, seal fixes, and multifunctional additives.  
     
     
         20 . The composition of  claim 1 , wherein the at least an isomerized base oil has a viscosity index of no less than about 140.  
     
     
         21 . The composition of  claim 1 , wherein the at least an isomerized base oil has a kinematic viscosity of greater than about 2 mm 2 /s at 100° C.  
     
     
         22 . The composition of  claim 1 , wherein the at least an isomerized base oil has a pour point of below about −8° C.  
     
     
         23 . The composition of  claim 1 , wherein the at least an isomerized base oil has a cloud point of below about 5° C.  
     
     
         24 . The composition of  claim 1 , wherein the at least an isomerized base oil has an Oxidator BN of greater than about 40 hours.  
     
     
         25 . A method of improving the performance and service life of an industrial turbine, said method comprising operating the turbine in the presence of a turbine oil composition comprising an admixture of: 
 a major amount of at least an isomerized base oil having consecutive numbers of carbon atoms and has less than 25 wt % naphthenic carbon by n-d-M; and    a minor amount of one or more standard turbine oil additive packages;    wherein the turbine oil composition has a viscosity index of greater than about 150.