US2011146139A1PendingUtilityA1

Method for improving the oxidation stability of biodiesel as measured by the rancimat test

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Assignee: POIRIER MARC-ANDREPriority: Sep 17, 2008Filed: Sep 17, 2009Published: Jun 23, 2011
Est. expirySep 17, 2028(~2.2 yrs left)· nominal 20-yr term from priority
Inventors:Marc-Andre PoirierAlexander Lang
C10L 1/04C10L 1/2222
54
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Claims

Abstract

The oxidation stability of biodiesel fuel or mixtures of biodiesel fuel and conventional diesel fuel is improved by at least 50% by the addition to such fuel of at least 250 mg of N-M (C 1 -C 5 ) alkyl cyclohexyl amine per liter of the biodiesel fuel or per liter of the biodiesel fuel component in the mixture of biodiesel fuel and conventional diesel fuel as compared to the oxidation stability of said fuel without such additive.

Claims

exact text as granted — not AI-modified
1 . A method for improving the oxidation stability of biodiesel fuel(s) or mixtures of biodiesel fuel(s) and conventional diesel fuel(s), said method comprising the addition to such biodiesel fuel(s) or mixtures of biodiesel fuel(s) and conventional diesel fuel(s) a stability additive selected from the group consisting of one or a mixture of N,N-di(C 1 -C 5 -alkyl)cyclohexylamine(s) in an amount of at least 250 mg of said one or a mixture of N,N-di(C 1 -C 5 -alkyl)cyclohexylamine per liter of the biodiesel fuel or per liter of the biodiesel fuel components in the mixture of biodiesel fuel and conventional diesel fuel wherein the oxidation stability of said additized fuel as measured by the Rancimat Test is increased by at least about 50% as compared to the oxidation stability of the fuel without the stability additive. 
     
     
         2 . The method of  claim 1  wherein the stability additive is one or a mixture of N,N-di(C 1 -C 2 -alkyl)cyclohexylamine(s). 
     
     
         3 . The method of  claim 1  wherein the stability additive is N,N-dimethylcyclohexylamine. 
     
     
         4 . The method of  claim 1 ,  2  or  3  wherein the stability additive is added to the biodiesel fuel(s) or mixture of biodiesel fuel(s) and conventional diesel fuel(s) in an amount of at least 500 mg of said stability additive per liter of the biodiesel fuel or per liter of the biodiesel fuel component in the mixture of biodiesel fuel(s) and conventional diesel fuel(s). 
     
     
         5 . The method of  claim 1 ,  2  or  3  wherein the stability additive is added to the biodiesel fuel(s) or mixture of biodiesel fuel(s) and conventional diesel fuel(s) in an amount of at least 1000 mg of said stability additive per liter of the biodiesel fuel(s) or per liter of the biodiesel fuel(s) component in the mixture of biodiesel fuel(s) and conventional diesel fuel(s). 
     
     
         6 . The method of  claim 1 ,  2  or  3  wherein the oxidation stability is increased by at least about 65%. 
     
     
         7 . The method of  claim 4  wherein the oxidation stability is increased by at least about 65%. 
     
     
         8 . The method of  claim 5  wherein the oxidation stability is increased by at least about 65%. 
     
     
         9 . The method of  claim 1 ,  2  or  3  wherein the oxidation stability is increased by 100% or more. 
     
     
         10 . The method of  claim 4  wherein the oxidation stability is increased by 100% or more. 
     
     
         11 . The method of  claim 5  wherein the oxidation stability is increased by 100% or more. 
     
     
         12 . The method of  claim 1 ,  2  or  3  wherein the stability additive is employed in the absence of any phenolic and/or aromatic amine antioxidant. 
     
     
         13 . The method of  claim 4  wherein the stability additive is employed in the absence of any phenolic and/or aromatic amine antioxidant. 
     
     
         14 . The method of  claim 5  wherein the stability additive is employed in the absence of any phenolic and/or aromatic amine antioxidant. 
     
     
         15 . The method of  claim 6  wherein the stability additive is employed in the absence of any phenolic and/or aromatic amine antioxidant. 
     
     
         16 . The method of  claim 7  wherein the stability additive is employed in the absence of any phenolic and/or aromatic amine antioxidant. 
     
     
         17 . The method of  claim 8  wherein the stability additive is employed in the absence of any phenolic and/or aromatic amine antioxidant. 
     
     
         18 . The method of  claim 9  wherein the stability additive is employed in the absence of any phenolic and/or aromatic amine antioxidant. 
     
     
         19 . The method of  claim 10  wherein the stability additive is employed in the absence of any phenolic and/or aromatic amine antioxidant. 
     
     
         20 . The method of  claim 11  wherein the stability additive is employed in the absence of any phenolic and/or aromatic amine antioxidant.

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