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Method for producing ricinoleic acid ester by selective enzymatic transesterification

A kind of technology of ricinoleic acid and castor oil, applied in the field of oil ester chemistry

Inactive Publication Date: 2012-02-01
ARKEMA FRANCE SA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, the literature does not describe any lipase specific for AR in the transesterification reaction
Even lipases extracted from castor oil plants, which showed a preference for AR during the hydrolysis reaction, did not show the associated typoselectivity

Method used

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  • Method for producing ricinoleic acid ester by selective enzymatic transesterification
  • Method for producing ricinoleic acid ester by selective enzymatic transesterification
  • Method for producing ricinoleic acid ester by selective enzymatic transesterification

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Embodiment Construction

[0032] The present invention relates to a process for the enzymatic transesterification of vegetable oils containing ricinoleic acid in connection with a chemical or enzymatic transesterification process in order to produce a fraction enriched in ricinoleic acid esters. Characteristically, the method uses an enzyme that exhibits "anti"-selectivity (also known as discrimination) for ricinoleic acid, i.e. it preferentially transesterifies the chain rather than ricinoleic acid . This effect is shown in particular on the two main fatty acids of ricinoleic acid other than castor oil: oleic acid and linoleic acid.

[0033] The method of enzymatic transesterification of the present invention is particularly suitable for oils "with low content" of ricinoleic acid, ie oils comprising less than 82% by weight of ricinoleic acid. This case is the case of castor oil with low ricinoleic acid content, or includes castor oil and derived from at least one other oleaginous (oleaginous), oleagi...

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Abstract

The present invention relates to a method for preparing ricinoleic acid ester from a pure or mixed vegetable oil, in particular castor oil, wherein said method includes at least the step of enzymatic transesterification in the presence of a light alcohol and using a typo-selective lipase in order to obtain a fraction enriched with ricinoleic acid ester. The method according to the invention for producing ricinoleic acid ester includes the following steps: i) a first transesterification reaction in the presence of a light alcohol and a lipase extracted from Geotrichum candidum, in order to obtain a mixture M containing AR mono-, di- and triglycerides, fatty acid esters other than AR, alcohol; ii) the step of separating said mixture M into at least two fractions, including a fraction A enriched with AR glycerides and a fraction B enriched with fatty acid esters other than AR; iii) the step of converting said AR glycerides into AR esters consisting of a fraction C rich in AR esters and a fraction rich in alcohol.

Description

technical field [0001] Generally, the present invention relates to the field of oleochemistry. More specifically, the present invention relates to a process for the preparation of ricinoleic acid esters from pure or mixed vegetable oils, in particular castor oil, said process comprising at least one step of enzymatic transesterification in the presence of light alcohols Subduction is performed by a typoselective lipase and produces a ricinoleate-enriched fraction. Background technique [0002] Fatty acid esters are generally obtained by chemical transesterification of refined vegetable oils in the presence of catalysts, in particular acid or base catalysts. This route to fatty acid esters makes it possible to obtain said esters in good yields; however it has a number of disadvantages, in particular related to the need to remove the catalyst used, difficult recovery of glycerol and high energy consumption. This type of process is still laborious since it involves many phys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/64C12P13/00
CPCC12P7/6454C12P7/6436C11C1/08Y02E50/13C12P13/005C12P7/649C11C3/003Y02E50/10C12P7/6458
Inventor J-L.迪布瓦C.布利厄-拉卡纳尔J.勒孔特E.迪布勒克P.维尔纳夫
Owner ARKEMA FRANCE SA
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