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

Inactive Publication Date: 2011-06-23
POIRIER MARC ANDRE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such functionalities are susceptible to oxidative degradation leading to the degradation of the biodiesel and its consequential unsuitability for use due to its lack of long-term stability caused by the presence therein of acids, alcohols, aldehydes, ketones, etc.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

example 1

This Example shows that N,N-dimethylcyclohexylamine is very effective is increasing the Rancimat oxidation stability.

RancimatIncreaseInductionRancimatTime,Induction%TestFuelAdditivehoursTime, hoursIncrease1Fuel 1None4.5500%2Fuel 2DMCHA7.462.91+64%3Fuel 3DMCHA9.995.44+119%

example 2

It might have been thought that acid scavengers might retard Rancimat oxidation stability as light acid species are produced during oxidation process. This Example shows that acid scavengers were ineffective in improving the Rancimat induction period.

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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 (C1-C5) 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.

Description

BACKGROUND OF THE INVENTION1. Field of the InventionThe present invention relates to biodiesel fuels or mixtures of biodiesel fuel and conventional diesel fuel and to the improvement of the oxidation stability of such fuels by the use of additives.2. Description of the Related ArtBiodiesel fuels which constitute the short chain alkyl esters of vegetable or animal oils or fats, while having been identified in the art as useful for combustion in diesel engines or as blending stock for mixtures with conventional diesel fuels are characterized as being less stable than conventional diesel fuels.Biodiesel fuels are mixtures of short chain alkyl esters of saturated and unsaturated vegetable oils or animal oils or fats and as such contain olefinic double bonds as well as the ester moiety. Such functionalities are susceptible to oxidative degradation leading to the degradation of the biodiesel and its consequential unsuitability for use due to its lack of long-term stability caused by the p...

Claims

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Application Information

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IPC IPC(8): C10L1/00
CPCC10L1/2222C10L1/04
Inventor POIRIER, MARC-ANDRELANG, ALEXANDER STANLEY
Owner POIRIER MARC ANDRE
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