METHOD FOR PRETREATING WASTE FAT, OIL AND GREASE AND CO-PRODUCING FIRST-GENERATION BIODIESEL

Abstract: provided is a method for pretreating waste fat, oil and grease (fog) and co-producing a first-generation biodiesel, including: s1, feeding waste fog, a liquid acid catalyst, and methanol into a pre-esterification reactor, and conducting pre-esterification to obtain a pre-esterification mixed liquid; s2, removing waste residues from the pre-esterification mixed liquid through a filter to obtain a filtrate, and separating the filtrate by a liquid-liquid separator to obtain an organic phase and an aqueous phase; s3, introducing the organic phase into a methanol recovery tower i and conducting separation to obtain a pre-esterification product and crude methanol; introducing the aqueous phase into a methanol recovery tower ii and conducting another separation to obtain a liquid acid catalyst and crude methanol; s4, separating the pre-esterification product through a biodiesel refining tower to obtain a first-generation biodiesel product, and a pretreated waste fog at a tower bottom.

Inventor(s): Lilong JIANG, Kuan Huang, Zhenping Cai, Yanning Cao, Yongde Ma

CPC Classification: C10L1/026 (FUELS NOT OTHERWISE PROVIDED FOR (fuels for generating pressure gas, e.g. for rockets ; candles ; nuclear fuel ); NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES , ; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS)

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