Method of producing alkyl esters from vegetable or animal oil and an aliphatic monoalcohol with fixed-bed hot purification

摘要

The present invention relates to a method of producing alkyl esters and glycerin from a crude or semi-refined vegetable oil and an aliphatic monoalcohol, comprising a deep pretreatment purification stage to eliminate the species based on phosphorus, calcium, magnesium, zinc or iron, insoluble under the temperature conditions of the heterogeneous catalytic reactor.