Sulfated Pillared Clay as Catalyst in Glycerol Esterification with Caprylic Acid

Abstract

Sulfated pillared clay (AP-S) was tested in the catalytic conversion of glycerol by esterification reaction with caprylic acid (octanoic acid, OA). The clay was treated with concentrated fuming sulfuric acid. The presence of sulfur as well as an increase in the acidity of the solid demonstrate the suitability of the sulfatation process. The best conditions for the esterification reaction with OA were OA:glycerol molar ratio 8:1, 423 K and 5 wt% catalyst. Total glycerol conversion was achieved after 5 h and yield of 27, 43 and 30 % respectively for monocarpylin, dicaprylin and tricaprylin were obtained.

Kinetics of ethylic esterification of lauric acid on acid activated montmorillonite (STx1-b) as catalyst

“…In addition, it is important to mention that the esterification route can also be used to feedstock with moderate free acidity as pre-treatment step in the framework of a conventional transesterification process [11]. Besides the biodiesel production, esterification of short and long chain carboxylic acids is an important route to produce including alkyl esters that are a very important class of chemicals covering a vast variety of applications such as flavors, perfumes, plasticizers, pharmaceuticals, solvents and chemical intermediates [13][14][15][16][17][18]. For esterification of carboxylic acids with alcohols in presence of acid catalysts, both homogeneous and heterogeneous catalysis have been used [19].…”

Arenesulfonic Acid-Functionalized Bentonite as Catalyst in Glycerol Esterification with Acetic Acid

“…The above results reflect the contribution of the acetic acid (as weak acidic catalyst), temperature (in endothermic esterification), and toluene as a water removing agent in the progress of glycerol esterification [4,22]. It is noted that the conversion and selectivity of glycerol esterification depends on the nature of the catalyst and the reaction parameters.…”

An overview on the conversion of glycerol to value‐added industrial products via chemical and biochemical routes

“…Glycerol esterification reactions with long‐chain carboxylic acids (oleic, stearic, or octanoic acid) can be highly interesting for MAG, DAG, and TAG production due to many industrial applications are possible [292]. The esterification of glycerol and caprylic acid by an immobilized sn ‐1, 3‐specific lipase from Rhizomucor miehei was carried out at a temperature range of 30–70°C, and a caprylic acid to glycerol molar ratio of 2:1 to 6:1.…”