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Biofuel Composition

Inactive Publication Date: 2008-07-17
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 rapeseed 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

[0151]The rapeseed oil 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.

[0152]The following varieties are pressed: CONTACT, CABRIOLET, CALIDA, MSP05 and MSP11 varieties.

[0153]The result of that step can be summarized in the following table (Table III).

TABLE IIIVarietiesCARACASCONTACTCABRIOLETCALIDAMSP05MSP11Seeds, kg19.419.219.514.919.319.5Dry matter,18.3417.8418.3214.0618.2118.33kgTheoretical8.938.358.736.408.578.28oil, kgNon filtered6.86.76.53.86.46.6oil, kgYield, %76.1480.2374.4659.3874.6872.3Oil cake, kg11.912.312.810.312.713.0Easy to press / EasyEasyEasyNotEasyEasyDifficulteasyto press

[0154]In this example and in the following examples, the CARACAS variety is used as a point of reference.

[0155]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

[0156]Extra...

example 2

Degumming Step

[0160]The degumming and the neutralization are both carried out in 10 litres temperature controlled reaction vessel.

[0161]In order to facilitate the degumming, mainly the decantation, the residual hexane content is adjusted at 6%.

[0162]The degumming step aims to remove the phospholipids naturally present in the crude oil.

[0163]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.

[0164]The results of this step are summarized in the following table (Table V).

TABLE VVarietyCARACASCONTACTCABRIOLETCALIDAMSP05MSP11Dry crude oil, g8.78.38.55.78.27.73H3PO4 at 75%, g17.416.717.111.416...

example 3

Refining or Neutralization Step

[0165]This step aims to remove the free fatty acids present in the degummed oil.

[0166]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.

[0167]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.

[0168]Then the aqueous phase is withdrawn (pH of 11-12) and the oil is washed with demineralized water until the used water is neutral.

[0169]The oil is then dried at 110° C. under vacuum during 30 min.

[0170]The process and the results are summarized in the following table (Table VI)

TABLE VIVariety:CARACASCONTACTCABRIOLETCALIDAMSP05MSP11NaOH 98.63%, g4.008.282.783.522.733.25H2O, g521500512343494464Washing steps354434PhasesGood separation, aqueous phase very...

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PUM

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Abstract

An object of the present invention is a novel rapeseed alkyl-ester(s) composition. Another object of the present invention is a process for the preparation of said novel rapeseed alkyl-ester(s) composition. Another object of the present invention 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 rapeseed 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 bio...

Claims

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Application Information

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IPC IPC(8): C10L1/18C10L1/19C11C3/10
CPCC10L1/026C10L1/1802C10L1/19Y02E50/13C11B1/10C11C3/003C11B1/08Y02E50/10
Inventor DESPEGHEL, JEAN-PIERRE
Owner MONSANTO SAS
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