US2008229656A1PendingUtilityA1

Method of reducing amount of peroxides, reducing fuel sediment and enhancing fuel system elastomer durability, fuel stability and fuel color durability

58
Individually held — no corporate assignee on recordPriority: Sep 18, 2003Filed: Sep 7, 2007Published: Sep 25, 2008
Est. expirySep 18, 2023(expired)· nominal 20-yr term from priority
Inventors:Joshua J. BennettScott D. Schwab
C10L 10/04C10L 1/231
58
PatentIndex Score
0
Cited by
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References
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Claims

Abstract

A reduction in the formation and presence of peroxides in low sulfur diesel fuels is obtained through the combination of those fuels with an organic nitrate combustion improver. The reduction in the amount of peroxides means that the fuel system elastomers will be more durable, as they are not being corroded by as much peroxide formed in the fuel, fuel color durability is improved, fuel stability is enhanced, and fuel sediments are reduced.

Claims

exact text as granted — not AI-modified
1 . (canceled) 
     
     
         2 . (canceled) 
     
     
         3 . (canceled) 
     
     
         4 . (canceled) 
     
     
         5 . (canceled) 
     
     
         6 . (canceled) 
     
     
         7 . (canceled) 
     
     
         8 . (canceled) 
     
     
         9 . A method of enhancing the durability of middle distillate fuel system elastomers comprising the steps of:
 providing a middle distillate fuel having a sulfur content of about 50 ppm or less;   combining the fuel with an organic nitrate combustion improver;   wherein the amount of organic nitrate combustion improver combined with the fuel enhances the durability of middle distillate fuel system elastomers as compared with the durability of elastomers in a middle distillate fuel system combusting a middle distillate fuel without the organic nitrate combustion improver.   
     
     
         10 . A method as described in  claim 9 , wherein the organic nitrate combustion improver comprises 2-ethylhexyl nitrate. 
     
     
         11 . A method as described in  claim 10 , wherein the 2-ethylhexyl nitrate is combined in an amount of from about 100 to 5000 ppm wt of the fuel. 
     
     
         12 . (canceled) 
     
     
         13 . (canceled) 
     
     
         14 . A method as described in  claim 9 , wherein the fuel has a sulfur content of about 20 ppm or less. 
     
     
         15 . (canceled) 
     
     
         16 . (canceled) 
     
     
         17 . (canceled) 
     
     
         18 . A method as described in  claim 9 , wherein the amount of peroxides in the fuel is less than about 8 ppm. 
     
     
         19 . A method as described in  claim 9 , wherein the durability of the elastomers is enhanced by up to 25% as measured by miles driven, gallons of fuel combusted or days/years of service, relative to the durability of elastomers in a middle distillate fuel system combusting fuel without an organic nitrate combustion improver. 
     
     
         20 . (canceled) 
     
     
         21 . A method of enhancing the color durability of a middle distillate fuel comprising the steps of:
 providing a middle distillate fuel having a sulfur content of about 50 ppm or less;   combining the fuel with an organic nitrate combustion improver;   wherein the amount of organic nitrate combustion improver combined with the fuel enhances the color durability of said middle distillate fuel compared with the color durability of a middle distillate fuel without the organic nitrate combustion improver.   
     
     
         22 . A method as described in  claim 21 , wherein the organic nitrate combustion improver comprises 2-ethylhexyl nitrate. 
     
     
         23 . A method as described in  claim 22 , wherein the 2-ethylhexyl nitrate is combined in an amount of from about 100 to 5000 ppm wt. of the fuel. 
     
     
         24 . (canceled) 
     
     
         25 . (canceled) 
     
     
         26 . A method as described in  claim 21 , wherein the fuel has a sulfur content of about 20 ppm or less. 
     
     
         27 . (canceled) 
     
     
         28 . (canceled) 
     
     
         29 . A method as described in  claim 21 , wherein the amount of peroxides in the fuel is less than about 8 ppm. 
     
     
         30 . A method as described in  claim 21 , wherein the fuel color durability is enhanced by up to 25% as measured by miles driven, gallons of fuel combusted or days/years of service, relative to the color durability of fuels without an organic nitrate combustion improver. 
     
     
         31 . (canceled) 
     
     
         32 . A method of enhancing the fuel stability of a middle distillate fuel comprising the steps of:
 providing a middle distillate fuel having a sulfur content of about 50 ppm or less;   combining the fuel with an organic nitrate combustion improver;   wherein the amount of organic nitrate combustion improver combined with the fuel enhances the fuel stability of said middle distillate fuel as compared with the fuel stability of a middle distillate fuel without the organic nitrate combustion improver.   
     
     
         33 . A method as described in  claim 32 , wherein the organic nitrate combustion improver comprises 2-ethylhexyl nitrate. 
     
     
         34 . A method as described in  claim 33 , wherein the 2-ethylhexyl nitrate is combined in an amount of from about 100 to 5000 ppm wt. of the fuel. 
     
     
         35 . (canceled) 
     
     
         36 . (canceled) 
     
     
         37 . A method as described in  claim 32 , wherein the fuel has a sulfur content of about 20 ppm or less. 
     
     
         38 . (canceled) 
     
     
         39 . (canceled) 
     
     
         40 . A method as described in  claim 32 , wherein the amount of peroxides in the fuel is less than about 8 ppm. 
     
     
         41 . A method as described in  claim 32 , wherein the fuel stability enhanced by up to 25% as measured by miles driven, gallons of fuel combusted or days/years of service, relative to the fuel stability of fuels without an organic nitrate combustion improver. 
     
     
         42 . (canceled) 
     
     
         43 . A method of reducing fuel sediment in a middle distillate fuel comprising the steps of:
 providing a middle distillate fuel having a sulfur content of about 50 ppm or less;   combining the fuel with an organic nitrate combustion improver;   wherein the amount of organic nitrate combustion improver combined with the fuel reduces fuel sediments in the middle distillate fuel as compared with the fuel sediments in a middle distillate fuel without the organic nitrate combustion improver.   
     
     
         44 . A method as described in  claim 43 , wherein the organic nitrate combustion improver comprises 2-ethylhexyl nitrate. 
     
     
         45 . A method as described in  claim 44 , wherein the 2-ethylhexyl nitrate is combined in an amount of from about 100 to 5000 ppm wt. of the fuel. 
     
     
         46 . (canceled) 
     
     
         47 . (canceled) 
     
     
         48 . A method as described in  claim 43 , wherein the fuel has a sulfur content of about 20 ppm or less. 
     
     
         49 . (canceled) 
     
     
         50 . (canceled) 
     
     
         51 . A method as described in  claim 43 , wherein the amount of peroxides in the fuel is less than about 8 ppm. 
     
     
         52 . A method as described in  claim 43 , wherein the fuel sediment is reduced by up to 25% as measured by miles driven, gallons of fuel combusted or days/years of service, relative to the fuel sediment in a fuel without an organic nitrate combustion improver. 
     
     
         53 . (canceled)

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