PEFTEC - Abstract

Abstract Information :

Polyalkylene glycol esters are obtained from the reaction of polyethylene glycol and fatty acids. These compounds are valuable, non-ionic surfactant derivatives that due to their emulsifying properties, high wetting ability, low foam, and non-toxicity properties have been used in various industries including lubricants and lubricants additives, textiles, pulp and, paper industry, chemical industry, pharmaceutical, and cosmetics industry. Oleic acid is used as a derivative of vegetable oils due to its abundance and compatibility with the environment, and PEG400 has also been used as a hydrophilic agent in the production of fatty acid esters. In this paper, the PEG400 Oleate esterification reaction was catalyzed by the protic ionic liquid. Due to the tribological properties of the catalyst and its solubility in the product and reaction media, there is no need for a catalyst separation process and therefore some problems like washing and purification are removed. Ionic liquids are molten salts at room temperature that include cationic and anionic units. These materials have been widely considered for their special properties such as low vapor pressure, non-flammability, thermal stability, and environmental friendliness. Protic ionic liquids are a group of ionic liquids that are prepared by stoichiometric neutralization of a Brunsted acid and base. Their key feature is the presence of protons in the catalyst. PILS are used as solvents and catalysts in organic syntheses. The ionic liquid BTA HDEHP was synthesized by the reaction of Benzotriazole and Bis 2-ethyl hexyl phosphoric acid in equal molar ratios at 100 C for 10 h. The ionic liquid structure was determined by proton nuclear magnetic resonance spectroscopy 1 H NMR, 400 MHz, carbon nuclear magnetic resonance spectroscopy 13C NMR, 100 MHz and The Fourier transform infrared FT-IR spectra. In this paper, The response surface methodology, as a common method of statistical design of experiments, was used to investigate the main and interaction effect of parameters including the molar ratio of acid to alcohol in the range of 1 to 3, temperature reaction ranging 160 to 200 C, and the time of reaction in the range of 8 to 24 hours, in the ester synthesis process. Also, the optimal condition for the synthesis of PEG400 Oleate was determined by ANOVA analysis. According to optimum conditions, the molar ratio of acid to alcohol of 1.57: 1, temperature reaction of 200 C, and 21h reaction time with 2.5 catalyst, the maximum conversion was predicted of 99.2 . Also, the ester molecular structure was confirmed by proton nuclear magnetic resonance spectroscopy 1 H NMR, 400 MHz.