Esterificación de ácidos nafténicos empleando hidrotalcita Mg-Al como catalizador.

NICOLAS REDONDO; GISELLE KEIM; NORMA AMADEO

Cordoba

Simposio; XX Congreso Argentino de Catalisis; 2017

SICAT

The presence of relatively high levels of naphthenic acids in crude oil may cause serious corrosion problem at temperature between 200ºC y 400ºC which mainly affects pipes and primary distillation units. One of the viable processes for decreasing acidity is the esterification of the acids present using an alcohol such as methanol. The aim of this work is to develop a solid catalyst for the esterification reaction of 3-cyclopentylpropionic acid representative of the naphthenic acids with methanol.The esterification reaction is carried out at 80 ° C, 3.5 kg / cm2 of pressure and mass ratio of catalyst to acid mass of 5. Mg-Al hydrotalcite (Mg / Al = 4) is used as catalyst no calcined and calcined at 500 ° C. Both solids are characterized by sortometry and X ray diffraction. The activity of the catalysts in the esterification is evaluated in a mechanically stirred batch reactor. The higher concentration of basic sites present in uncalcined hydrotalcite would explain the efficient behavior obtained. TAN decreased 90% by operating at a temperature of 80 ° C after 60 min of reaction.