Avaliação da glicerólise dos óleos de canola, coco, soja e mamona na presença do complexo organoestânico DBTDL

Abstract

In this work, the influence of the fatty acid composition of vegetable oils of canola, coconut, castor and soy was investigated in glycerolysis reactions in the absence and presence of the DBTDL organo-tin (IV) complex, which acted as a catalyst in the reaction. Thus, the reactions were conducted in a Parr type stainless steel reactor with a capacity of 100 milliliters, with mechanics, equipped with a thermocouple to measure the temperature and with a valve for the removal of aliquots, such as those removed in the reaction times of 0, 5, 1, 2, 3, 4 and 5 hours. The reactions were conducted at 220 ° C with a ratio of 1/6 and 1/6 / 0.01 between TAG, GLI and catalyst, when using the DBTDL complex, respectively. After the catalytic tests, the reaction products were quantified by HPLC. From these data, the kinetic data for glycerolysis of vegetable vegetables were determined. Where, the glycerolysis reactions with canola and soy oil in the presence of catalyst the best performances, with an increase in conversion when compared to the reaction in the absence of catalyst of 5.13 and 5.24 times for canola and soy, that did suggest that the reaction efficiency for canola and soybean oils when in the presence of the tin (IV) complex can be related to its Lewis acidity and not only with steric and miscibility factors. In addition, it can be highlighted that the use of the DBTDL catalyst did not cause reaction problems, either in equipment, such as corrosion, or in the final product, as non-formation of undesirable products.