METHOD FOR PREPARING BIODIESEL

• Main Authors: KO, JUNG HWAN, LEE, KANG HOON, KIM, GYUNG SOO, JEON, EU GENE, PARK, HYEOK, YUN, JUN U, KWAK, JIN SIK, HA, TAE HO, LEE, SEUNG DON
• Format: Patent
• Language: English; French; German
• Published: 21.10.2015
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; 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; CRACKING HYDROCARBON OILS; DETERGENTS; ESSENTIAL OILS; 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; MINERAL WAXES; NATURAL GAS; ORGANIC CHEMISTRY; 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; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE

Disclosed herein is a method of preparing biodiesel, including the steps of: removing foreign materials from biodiesel raw oil containing lower fatty acid and having an acid value of 20 mgKOH/g or less with an adsorbent; dewatering the foreign materials removed biodiesel raw oil; passing the dewatered biodiesel raw oil through a solid acid catalyst reaction guard bed provided with a cation exchange resin for removing metal cations at 20˜80° C. at a flow rate of 6 vol % (6 SV) or less, mixing methanol with the passed biodiesel raw oil, and then passing the mixture through a solid acid catalyst reaction main bed provided with a solid acid catalyst for an esterification reaction at 70˜120° C. at a flow rate of 0.5˜1.5 SV to adjust a final acid value of the biodiesel raw oil to 5 mgKOH/g or less; and reacting the biodiesel raw oil having the final acid value of 5 mgKOH/g or less in the presence of an alkali catalyst.