Method for producing alkyl esters using vegetable or animal oil and an aliphatic mono-alcohol with hot purification in a fixed bed

摘要

Producing fatty acid alkyl ester and glycerin using one or more transesterification reaction between a crude or semi-refined vegetable or animal oil and an aliphatic monoalcohol, and using a heterogeneous catalyst, comprises at least one step of pretreatment of oil comprising passing the oil in a pretreatment reactor comprising at least one fixed bed of at least one adsorbent based on porous refractory oxide free of metal catalyst comprising metals of group 6, 8 to 12 of periodical table, at a temperature of 140-320[deg] C, under a pressure of 0.1-7 MPa, with a residence time of 0.1-1 hour.