Method for producing biodiesel by coupling enzyme method and acid-alkali method

The invention discloses a method for producing biodiesel by coupling an enzyme method and an acid-alkali method. The method comprises the following steps: mixing raw oil, liquid fat complex enzyme, dilute methanol and a reaction auxiliary agent together, and simultaneously performing three reactions...

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Bibliographische Detailangaben
Hauptverfasser:	JIAO JIWEN, ZHU LUOLE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES BEER BIOCHEMISTRY CANDLES CHEMISTRY DETERGENTS ENZYMOLOGY ESSENTIAL OILS FATTY ACIDS THEREFROM FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE FIRELIGHTERS FUELS FUELS NOT OTHERWISE PROVIDED FOR LIQUEFIED PETROLEUM GAS LUBRICANTS METALLURGY MICROBIOLOGY MUTATION OR GENETIC ENGINEERING NATURAL GAS PEAT PERFUMES PETROLEUM, GAS OR COKE INDUSTRIES PRODUCING (PRESSING, EXTRACTION), REFINING AND PRESERVINGFATS, FATTY SUBSTANCES (e.g. LANOLIN), FATTY OILS AND WAXES,INCLUDING EXTRACTION FROM WASTE MATERIALS SPIRITS SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K TECHNICAL GASES CONTAINING CARBON MONOXIDE VINEGAR WINE
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Beschreibung
Zusammenfassung:	The invention discloses a method for producing biodiesel by coupling an enzyme method and an acid-alkali method. The method comprises the following steps: mixing raw oil, liquid fat complex enzyme, dilute methanol and a reaction auxiliary agent together, and simultaneously performing three reactions of hydrolysis, esterification and transesterification; separating the mixed reaction liquid to obtain an oil phase and a water phase, and simultaneously recovering the enzyme for continuous repeated use; drying the oil phase, adding an acid catalyst, considering that the reaction at the stage is finished after the fatty acid reaction is finished, and taking away excessive methanol with dry air; adding alkali into the reacted oil phase for neutralization until the acid value is less than 0.5 KOHmg/g; and distilling the blended oil phase in a tower to obtain plant asphalt, light components and biodiesel. The method disclosed by the invention can effectively solve the problem that most traditional biodiesel factories