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US 2009/0264671 A1Published application
Method for Producing Biodiesel Using Supercritical Alcohols
OwnerMin Jeong Noh, Ki Pung Yoo +1inventors
InventorsMin Jeong Noh, Ki Pung Yoo, Young Hae Choi
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Abstract
Disclosed herein is a method for producing biodiesel in the form of fatty acid alkyl ester by esterifying oils-and-fats, including animal or vegetable oils-and-fats or waste thereof, with supercritical alcohol. According to the disclosed method, it is possible to produce high-purity fatty acid alkyl ester at low cost and high productivity.
Claims22
A method for producing biodiesel in the form of fatty acid alkyl ester by esterifying oils and-fats, including vegetable or animal oils and fats or wastes thereof, with alcohol, the method comprising the steps of:
- (a) pumping alcohol and oils and fats under pressure into a mixer, in which they are uniformly mixed with each other;
- (b) elevating the temperature of the mixture through a heat exchanger;
- (c) heating the temperature-elevated mixture to a predetermined temperature;
- (d) subjecting the mixture to esterification in conditions where the alcohol is maintained at a supercritical state;
- (e) heat-exchanging the esterified product with a subsequent mixture of alcohol and oils-and-fats in the heat exchanger;
- (f) reducing the pressure of the heat-exchanged product to separate and recover the alcohols;
- and
- (g) separating and recovering fatty acid alkyl ester from the reaction product from which the alcohols have been removed.
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Dependencies are inferred from the claim text.