US2006130394A1PendingUtilityA1

Performance diesel fuels and additives

44
Assignee: FLINT HILLS RESOURCES L PPriority: Dec 22, 2004Filed: Dec 22, 2004Published: Jun 22, 2006
Est. expiryDec 22, 2024(expired)· nominal 20-yr term from priority
Inventors:Charles W. SelvidgeKen Copeland
C10L 10/08C10L 1/231C10L 1/143C10L 1/2425C10L 1/1824C10L 1/2456C10L 1/1811C10L 1/2222C10L 1/1852C10L 1/19C10L 1/1616C10L 1/1881C10L 10/12
44
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Claims

Abstract

Diesel fuels with additives to increase cetane number include chemistries to increase surface absorption and improve lubricity in high cetane number fuels. Fuels and additives also contain thermal stability improvers.

Claims

exact text as granted — not AI-modified
1 . A diesel fuel additive composition comprising: 
 a base oil;    cetane improver effective to increase cetane number of a diesel fuel by at least 2 cetane numbers; and    an amount of a surface absorption compound effective to improve the lubricity of a diesel fuel containing the additive to less than 520 microns in an HFRR wear test.    
   
   
       2 . The additive of  claim 1 , wherein the surface absorption compound is effective to improve the lubricity of a diesel fuel containing the additive to less than 460 microns in an HFRR wear test.  
   
   
       3 . The additive of  claim 1 , wherein the surface absorption compound is effective to improve the lubricity of a diesel fuel containing the additive to less than 400 microns in an HFRR wear test.  
   
   
       4 . The additive of  claim 1 , wherein the cetane improver is 2-ethyl hexyl nitrate, tertiary butyl peroxide, diethylene glycol methyl ether, cyclohexanol, or combinations thereof.  
   
   
       5 . The additive of  claim 1 , wherein the surface absorption compound comprises alkyl esters, mono acids of fatty acids, alkyl esters of fatty acids, or combinations thereof.  
   
   
       6 . The additive of  claim 1 , wherein the absorption compound comprises a monoacid of a fatty acid.  
   
   
       7 . The additive of  claim 1 , wherein the absorption compound comprises an alkyl ester of a fatty acid.  
   
   
       8 . The additive of  claim 7 , wherein the alkyl ester is a methyl ester or an ethyl ester.  
   
   
       9 . The additive of  claim 7 , wherein the alkyl ester is synthetic.  
   
   
       10 . The additive of  claim 7 , wherein the alkyl ester is plant derived.  
   
   
       11 . The additive of  claim 1 , further comprising a thermal stabilizer.  
   
   
       12 . The additive of  claim 11 , wherein the thermal stabilizer comprises organic amines in kerosene solvent.  
   
   
       13 . The additive of  claim 1 , further comprising a detergent or deposit control chemistry.  
   
   
       14 . The additive of  claim 1 , further comprising a microbicide.  
   
   
       15 . The additive of  claim 1 , further comprising a marker substance.  
   
   
       16 . The additive of  claim 1 , further comprising a dispersant.  
   
   
       17 . A diesel fuel additive composition comprising: 
 cetane improver effective to increase cetane number of a diesel fuel by at least 2 cetane numbers; and    an amount of a surface absorption compound effective to improve the lubricity of a diesel fuel containing the additive to less than 520 microns in an HFRR wear test;    wherein the additive further comprises one or more of:    a thermal stabilizer;    a detergent;    a microbicide;    a marker substance; and    a dispersant.    
   
   
       18 . A diesel fuel comprising: 
 diesel base oil;    a cetane improver effective to increase cetane number of the diesel fuel by at least 2 cetane numbers; and    wherein the lubricity of the diesel fuel is less than 520 microns in an HFRR wear test.    
   
   
       19 . The diesel fuel of  claim 18 , wherein the fuel has a lubricity of less than 460 microns in an HFRR wear test.  
   
   
       20 . The diesel fuel of  claim 18 , wherein the fuel has a lubricity of less than 400 microns in an HFRR wear test.  
   
   
       21 . The diesel fuel of  claim 18 , comprising from about 100 to about 6000 ppm cetane improver.  
   
   
       22 . The diesel fuel of  claim 18 , wherein the cetane improver is 2-ethyl hexyl nitrate, tertiary butyl peroxide, diethylene glycol methyl ether, cyclohexanol, or combinations thereof.  
   
   
       23 . The diesel fuel of  claim 18 , comprising from about 100 to about 6000 ppm 2-ethyl hexyl nitrate, tertiary butyl peroxide, diethylene glycol methyl ether, cyclohexanol, or combinations thereof.  
   
   
       24 . The diesel fuel of  claim 18 , comprising from about 10 to about 500 ppm alkyl esters, mono acids of fatty acids, alkyl esters of fatty acids, or combinations thereof.  
   
   
       25 . The diesel fuel of  claim 24  comprising a synthetic alkyl ester.  
   
   
       26 . The diesel fuel of  claim 24 , comprising a plant derived alkyl ester.  
   
   
       27 . The diesel fuel of  claim 18 , comprising from about 10 to about 200 ppm thermal stabilizer.  
   
   
       28 . The diesel fuel of  claim 27 , wherein the stabilizer is organic amines in kerosene solvent.  
   
   
       29 . The additive of  claim 18 , further comprising from about 50 to about 500 ppm of a detergent.  
   
   
       30 . The diesel fuel of  claim 18 , further comprising from about 2 to about 15 ppm microbicide.  
   
   
       31 . The diesel fuel of  claim 18 , further comprising a chemical marker substance.  
   
   
       32 . The diesel fuel of  claim 18 , further comprising a dispersant.  
   
   
       33 . The diesel fuel of  claim 18 , comprising a base oil and an additive comprising a cetane improver and a surface absorption compound.  
   
   
       34 . The diesel fuel of  claim 18 , further comprising a base oil and an additive comprising a cetane improver, a surface absorption compound, a thermal stabilizer, a detergent, a microbicide, a marker substance, and a dispersant.  
   
   
       35 . The diesel fuel of  claim 18 , wherein the base oil is #2 diesel.  
   
   
       36 . The diesel fuel of  claim 18 , wherein the base oil is #1 diesel.  
   
   
       37 . The diesel fuel of  claim 18 , wherein the base oil is a blend of # 2 diesel and light cycle oil.  
   
   
       38 . The diesel fuel of  claim 18 , wherein the base oil incorporates one or more cold flow improvers.  
   
   
       39 . The diesel fuel of  claim 18 , wherein the base oil is a low sulfur diesel.  
   
   
       40 . The diesel fuel of  claim 18 , wherein the base oil sulfur is less than 15 ppm.  
   
   
       41 . A process for improving the chemistry of a diesel fuel with enhanced ignition quality, wherein the fuel comprises a diesel base oil and a cetane improver effective to improve the ignition quality by at least 2 cetane numbers, comprising adding from about 10 to about 500 ppm alkyl esters, mono acids of fatty acids, alkyl esters of fatty acids, or combinations thereof, effective to increase the lubricity of the enhanced diesel fuel.  
   
   
       42 . The process of  claim 41  wherein the lubricity of the diesel fuel is less than 520 microns in an HFRR wear test.  
   
   
       43 . The process of  claim 41 , wherein the fuel has a lubricity of less than 460 microns in an HFRR wear test.  
   
   
       44 . The process of  claim 41 , wherein the fuel has a lubricity of less than 400 microns in an HFRR wear test.

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