METHOD FOR THE TRANS-ESTERIFICATION OF TRIGLYCERIDES WITH MONOALCOHOLS HAVING A LOW MOLECULAR WEIGHT IN ORDER TO OBTAIN LIGHT ALCOHOL ESTERS USING MIXED CATALYSTS

摘要

The transesterification of triglycerides obtained from vegetable or animal oils or with used frying oils to obtain fatty acid esters of low molecular weight alcohols has been carried out with a mixed catalytic system made up of carboxylic acid salts and alkaline metal hydroxides. With this catalytic system the preliminary preparatory steps can be eliminated and the operation time reduced. <??>The process is carried out at moderate conditions of pressure and temperature, in a stirred-tank reactor, in continuous or discontinuous mode. <??>The esters obtained can be used as fuels and solvents in addition to other uses.