Compositions which can be used as biofuel

Details Compositions which can be used as biofuel Compositions which can be used as biofuel

C - Chemistry, Metallurgy

11

C

C11C 3/00 (2006.01) C07C 69/003 (2006.01) C10L 1/10 (2006.01) C12P 7/64 (2006.01)

Patent

CA 2595007

The invention relates to a composition which contains an alkylester which is provided with an alkyl radical containing 1 - 8 carbon atoms and partial glycerides which have a glycerine content of free glycerine upto a maximum of 2 wt.% in relation to the total amount of the composition. The invention also relates to a first method for producing the inventive composition, wherein triglycerides are enzymatically reacted with an esterase in the presence of alcohols which are provided with a plurality of carbon atoms having 1 - 8 C atoms, said esterase being activated by adding alkaline salts. In an additional method, the esterases are immobilised and / or chemically modified. The invention further relates to a method, wherein the inventive composition is produced by chemical partial tranesterfication. The invention subsequently relates to a composition which can be obtained according to said method, in addition to the use of the inventive compositions as biodiesel or additives in fuel compositions.

Composition qui contient un ester d'alkyle avec un radical alkyle contenant 1 à 8 atomes de carbone et des glycérides partiels et qui présente une teneur en glycérine libre de 2% en poids au maximum par rapport à la quantité totale de la composition. La présente invention concerne également un premier procédé de production de la composition selon la présente invention selon lequel des triglycérides sont mis en réaction enzymatique avec une estérase en présence d'alcools ayant de 1 à 8 atomes de carbone, ladite estérase étant activée par l'ajout de sels alcalins. Dans un autre procédé, les estérases sont immobilisées et / ou chimiquement modifiées. En outre, un procédé selon lequel la composition selon la présente invention est produite par transestérification partielle chimique est également décrit. La présente invention concerne enfin une composition pouvant être obtenue selon un procédé susmentionné ainsi que l'utilisation des compositions selon la présente invention en tant que biodiesel ou additif dans des compositions de carburant.

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