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This work evaluates the optimum condition of the esterification reaction of oleic acid (OA) and ethanol by Dean-Stark trap (DS) and without technology, as well as the effects of the various factors’ interaction on the conversion rate of OA. The influences of OA/ethanol molar ratio, concentration of catalyst, temperature reaction, and time reaction on the conversion rate of OA were investigated. The response surface method (RSM) is combined to optimize the experimental scheme. The results showed that the conversion rate of OA reached the peak of 98.78% when the molar ratio of ethanol/OA was 9:1, the concentration of catalyst was 3%, the temperature reaction was 90 oC, and the reaction time was 10 hours. Compared with the esterification reaction without DS, the conversion rate of OA was 54.96%. FTIR analysis confirmed the changes of a functional group for the response, and GC-MS was for confirmation of the fragmentation mode of the esterification reaction that occurs. The availability of ethyl oleate derived from palm oil, aimed at surfactant production, provides an excellent feedstock to produce surfactants for cosmetic applications.

Ni-Doping Ni metal into ZIF-8 material aims to increase the ability of ZIF-8. Ni-ZIF-8 was synthesized using an environmentally friendly method by reusing methanol as a solvent in the previous process and carried out at room temperature. The ratio of the molar ratios used was 1:4:4 for Zinc nitrate:2methylimidazolate: TEA. As an effort to save the environment from the dangers of waste caused by the filtrate, Ni-ZIF-8 was then synthesized using the same filtrate up to six times. Based on the results of characterization using XRD, FTIR and SEM showed that the Ni-ZIF-8 material synthesized using the filtrate had similarities with Ni-ZIF-8 synthesized with pure methanol.