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Biodiesel Composition

a biodiesel and composition technology, applied in the direction of fatty-oil/fat production, liquid carbonaceous fuels, fatty-oil/fat refining, etc., can solve the problems of affecting the operability of the engine, the oxidation reaction rate of biodiesel, etc., and achieves low or low, saturated fatty acid content, high

Inactive Publication Date: 2009-02-12
MONSANTO SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0016]The present invention is based on the surprising discovery that the transesterification of a vegetable oil showing low, or even very low, saturated fatty acids content may nevertheless be advantageous, particularly when said oil composition shows high or very high oleic acid content and / or low or very low linolenic acid content.

Problems solved by technology

But the main drawbacks with biodiesel products remain their temperature properties and also their reactivity toward oxidation and polymerization.
It is also admitted that the presence of linolenic acid methyl ester in biodiesel increases the rate of biodiesel polymerisation adversely affecting engine operability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Oil Extraction

a). Mechanical Extraction

[0159]The seeds are pressed in a single screw press, Täby 40A press, with a diameter of 6.5 mm, at a temperature comprised between about 40° and about 60° C.

[0160]The following varieties are pressed: CARACAS, CONTACT, CABRIOLET, CALIDA, SPIRAL, MSP05, MSP11, MSP13, ELANSOL and AURASOL varieties.

[0161]The result of that step is summarized in Table III.

[0162]In this example and in the following examples, the CARACAS variety is used as a point of reference.

[0163]It can be noted that the yields are very high, between about 70% and about 75%, except for CALIDA variety.

b). Hexane Extraction

Material of Extraction

[0164]Extractor 5 L, a thermic bath and an extraction cartridge 13 L

Conditions of the Extraction

[0165]The temperature of the bath is set at 82.5° C. for a flow rate of hexane of about 2 L / h. The extraction process lasts about 16 hours. Because of the important amount of oil cake, the extraction process is repeated twice. The hexane contained i...

example 2

Degumming Step

[0168]The degumming and the neutralization are both carried out in 10 litres temperature controlled reaction vessel.

[0169]In order to facilitate the degumming, mainly the decantation, the residual hexane content is adjusted at 6%.

[0170]The degumming step aims to remove the phospholipids naturally present in the crude oil.

[0171]The oil is introduced in the reaction vessel, then the temperature is raised up to 65° C. while the oil is agitated. At 65° C., phosphoric acid (1.5‰) and water (6% based on the oil weight) are added. The mixture is agitated during 10 min. and then the temperature is raised up to 75° C. The mixture is agitated at this temperature of 75° C. during 30 min. Then, the decantation is allowed to proceed during 30 min. Finally, the heavier phase is removed.

[0172]The results of this step are summarized in Table V.

example 3

Refining or Neutralization Step

[0173]This step aims to remove the free fatty acids present in the degummed oil.

[0174]The degummed oil is maintained at 75° C. in a reaction vessel in which sodium hydroxide is added in excess of 10% compared to theoretical amount needed and the mixture is agitated during 5 min.

[0175]Then the temperature is raised up to 95° C. and maintained at 95° C. during 30 min. The reaction vessel is cooled down at 65° C. and the two phases of the reaction mixture are allowed to separate by gravity during 20 min.

[0176]Then the aqueous phase is withdrawn (pH of 11-12) and the oil is washed with demineralized water until the used water is neutral.

[0177]The oil is then dried at 110° C. under vacuum during 30 min.

[0178]The process and the results are summarized in Table VI.

[0179]The varieties have all a low acid number: below 1 mg KOH / g. Usually, the acid number of common rapeseed oil is about 2 to about 3.5 mg KOH / g.

[0180]With an acid number below 0.3 mg KOH / g, the d...

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PUM

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Abstract

The present invention relates to a novel alkyl-ester (s) composition derived from rapeseed and sunflower, in particular from Brassica napus and Helianthus annuus. The present invention also to a process for the preparation of said novel alkyl-ester (s) composition. It also relates to the use of said composition in diesel engines in its pure form or blended with another composition, e.g. with fuel.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a new alkyl esters composition. The present invention further relates to a process to obtain said new composition and its use as biodiesel.BACKGROUND[0002]For years, biodiesel has been considered as an alternative to petroleum based diesel. Biodiesel is a general term referring to a fuel comprised of mono-alkyl esters of long chain fatty acids derived from vegetable oils or animal fats. It can be used per se as fuel or as an additive, generally in a blend with petroleum-based diesel fuel.[0003]The numerous advantages of using Biodiesel are well known. Indeed, it offers similar fuel economy, horsepower and torque to petroleum diesel while providing superior lubricity. Its use results in a substantial reduction of emissions of unburned hydrocarbons, carbon monoxide, and particulate matter. Moreover, it is essentially free of sulfur and aromatics.[0004]Biodiesel is therefore regarded as a renewable, non-toxic and biodegradabl...

Claims

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Application Information

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IPC IPC(8): C10L1/18
CPCC10L1/026C11B1/06C11B1/10Y02E50/13C11C3/003C11C3/10C11B3/001Y02E50/10
Inventor DESPEGHEL, JEAN-PIERRE
Owner MONSANTO SAS
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