US2008256849A1PendingUtilityA1

Conductivity of middle distillate fuels with a combination of detergent and cold flow improver

51
Individually held — no corporate assignee on recordPriority: Apr 19, 2007Filed: Apr 19, 2007Published: Oct 23, 2008
Est. expiryApr 19, 2027(~0.7 yrs left)· nominal 20-yr term from priority
Inventors:Alexander M. KulinowskiTimothy Brennan
C10L 1/2691C10L 1/201C10L 1/19C10L 10/18C10L 1/238C10L 1/2493C10L 1/1824C10L 1/2225C10L 1/1616C10L 1/1963C10L 1/1973C10L 1/2437C10L 1/1966C10L 10/14C10L 1/1832C10L 1/2383C10L 1/1985C10L 1/1608C10L 1/189C10L 1/207C10L 1/221C10L 1/1881
51
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Claims

Abstract

The disclosure provides conductivity improving concentrates and methods for improving conductivity and reducing risks associated with static discharge in middle distillate fuel compositions, particularly diesel fuels. The conductivity improvement is provided by the combination of a detergent and a cold flow improver, which are preferably and advantageously pre-blended in an additive concentrate. The disclosure is particularly beneficial for ultra-low sulfur fuel compositions in that it provides a conductivity benefit without adding sulfur into the fuel composition.

Claims

exact text as granted — not AI-modified
1 . An additive concentrate for a middle distillate fuel composition comprising an antistatic agent, said antistatic agent comprising, in combination, detergent and a cold flow improver. 
     
     
         2 . The additive concentrate of  claim 1 , wherein said additive concentrate is substantially free of sulfur compounds. 
     
     
         3 . The additive concentrate of  claim 1 , wherein said additive concentrate is substantially free of sulfur-containing antistatic agents. 
     
     
         4 . The additive concentrate of  claim 1 , wherein said additive concentrate contains no more than 15 ppm of sulfur. 
     
     
         5 . The additive concentrate of  claim 1 , wherein said fuel comprises a diesel fuel. 
     
     
         6 . The additive of  claim 1 , wherein said detergent comprises a succinimide. 
     
     
         7 . The additive concentrate of  claim 1 , wherein the cold flow improver comprises a alkyl phenol. 
     
     
         8 . Use of the additive concentrate of  claim 1  to provide a conductivity measure of at least 25 pS/m in a middle distillate fuel composition at the time and temperature of delivery of said fuel. 
     
     
         9 . A middle distillate fuel composition comprising an antistatic agent, said antistatic agent comprising, in combination, a detergent and a cold flow improver. 
     
     
         10 . The fuel composition of  claim 9 , wherein said fuel comprises a diesel fuel. 
     
     
         11 . The fuel composition of  claim 10 , wherein said fuel contains no more than 15 ppm of sulfur. 
     
     
         12 . The fuel composition of  claim 11 , wherein said diesel fuel is substantially free of sulfur-containing antistatic agents. 
     
     
         13 . The fuel composition of  claim 9 , wherein said middle distillate fuel composition is substantially free of sulfur-containing conductivity improvers. 
     
     
         14 . The fuel composition of  claim 9 , wherein said fuel has a conductivity of at least 25 pS/m at the time and temperature of delivery of said fuel. 
     
     
         15 . The fuel composition of  claim 9 , wherein said detergent comprises a succinimide. 
     
     
         16 . The fuel composition of  claim 9 , wherein said cold flow improver comprises a alkyl phenol. 
     
     
         17 . Use of the fuel of  claim 1  in a combustion apparatus. 
     
     
         18 . A method for improving the conductivity of a middle distillate fuel composition comprising the step of adding an antistatic agent to said fuel in an amount sufficient to provide a conductivity of at least 25 pS/m at the time and temperature of delivery of said fuel, wherein said antistatic agent comprises, in combination, a detergent and a cold flow improver. 
     
     
         19 . The method of  claim 18 , wherein said fuel composition comprises a diesel fuel. 
     
     
         20 . The method of  claim 19 , wherein said diesel fuel is substantially free of sulfur-containing antistatic agents. 
     
     
         21 . The method of  claim 19 , wherein said diesel fuel, after addition of said antistatic agent, contains no more than 15 ppm of sulfur. 
     
     
         22 . The method of  claim 18 , wherein said detergent and said cold flow improver are part of a multifunctional additive concentrate. 
     
     
         23 . A method of dispensing a middle distillate fuel composition comprising the steps of adding to a middle distillate fuel composition an antistatic agent in an amount sufficient to provide a conductivity of at least 25 pS/m at the time and temperature of delivery of said fuel, wherein said antistatic agent comprises, in combination, a detergent and a cold flow improver. 
     
     
         24 . The method of  claim 23 , further comprising the step of dispensing said fuel prior to the conductivity dropping below 25 pS/m. 
     
     
         25 . The method of  claim 24 , wherein said dispensing step comprises dispensing said middle distillate fuel composition into a bulk container. 
     
     
         26 . The method of  claim 23 , wherein said detergent and said cold flow improver are pre-blended in an additive concentrate prior to addition to said fuel. 
     
     
         27 . The method of  claim 23 , wherein said middle distillate fuel composition comprises a diesel fuel. 
     
     
         28 . The method of  claim 23 , wherein said diesel fuel, after the addition of said antistatic agent, contains no more than 15 ppm of sulfur. 
     
     
         29 . A method of reducing a risk of explosion from static discharge, comprising the steps of adding an antistatic agent to a middle distillate fuel composition in an amount sufficient to provide a conductivity of at least 25 pS/m at the time and temperature of delivery of said fuel, wherein said antistatic agent comprises, in combination, a detergent and a cold flow improver. 
     
     
         30 . The method of  claim 29 , further comprising the step of dispensing said fuel prior to said conductivity dropping below 25 pS/m. 
     
     
         31 . The method of  claim 30 , wherein said dispensing step comprises dispensing said middle distillate fuel composition into a bulk container. 
     
     
         32 . The method of  claim 29 , wherein said detergent and said cold flow improver are pre-blended in an additive concentrate prior to addition to said fuel. 
     
     
         33 . The method of  claim 29 , wherein said fuel composition comprises a diesel fuel. 
     
     
         34 . The method of  claim 33 , wherein said diesel fuel is substantially free of sulfur-containing antistatic agents. 
     
     
         35 . The method of  claim 33 , wherein said diesel fuel, after addition of the antistatic agent, contains no more than 15 ppm of sulfur.

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