Method for preparing biodiesel using subcritical hydrolysis and supercritical alcoholysis

• Main Authors: CHEN, WEI-HENG, CHEN, CHIN-PANG, SUN, CHUANIA, WANG, SHENG-DI, CHANG, CHIEH-MING, CHEN, CHING-HUNG
• Format: Patent
• Language: Chinese; English
• Published: 16.02.2011
• Subjects: 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; CANDLES; CHEMISTRY; DETERGENTS; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS,OILS, OR FATTY ACIDS OBTAINED THEREFROM; FATTY ACIDS FROM FATS, OILS OR WAXES; FATTY ACIDS THEREFROM; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; LIQUEFIED PETROLEUM GAS; LUBRICANTS; METALLURGY; NATURAL GAS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TRANSPORTING

A method for preparing biodiesel using subcritical hydrolysis and supercritical alcoholyis, specifically utilizing jatropha seed oil extracted by a supercritical fluid as raw material firstly performing subcritical hydrolytic reaction, then using a supercritical methanol fluid to perform alcoholysis. The present invention is different from conventional oil that is directly reacted with supercritical methanol. The present invention is characterized in that: the conversion rate of the oil, which has been hydrolyzed by supercritical methylester, can reach above 99% in 5 minutes without adding any catalysts.