естерифікація

The non-catalytic and catalytic interactions between ethanolamine and acetic acid have been investigated. The effects of the type of catalyst, solvent, temperature, and reagent ratio on acetic acid conversion, reagent amine group conversion, and selectivity for amides and esters were established. The kinetic and thermodynamic parameters for the 2- hydroxyethanamonium acetate transformation into N-(2- hydroxyethyl)acetamide/2-aminoethyl acetate were determined.

This paper reports the synthesis of isopropyl laurate while using a mixture of metal oxides as a catalyst. The best conversion value was obtained in the following conditions: 393 K, isopropanol:lauric acid molar ratio is 10:1, composition of the catalyst is 33 % CuO, 33 % Ag2O and 33 % Al2O3, catalyst/lauric acid ratio is 8 % (w/w), and reaction time 2 h. Isolation of the catalysts after esterification showed that the oxides were not converted into other materials.

 The features of acetic acid esterification with С4–С5–alcohols in presence of metal oxalates and other organic and inorganic salts as a catalyst have been studied. It has been found that the presence of conjugated double bonds in oxalic acid reduces the electron density on the cation of catalyst, but due to insolubility of oxalic acid salts in the reaction medium effective influence of anion almost disappears.  Досліджені закономірності естерифікації оцтової кислоти спиртами С4–С5 у присутності оксалатів металів та багатьох інших мінеральних і органічних солей.

The influence of the сatalyst type on the process of esterification of 3-methyl-crotonic acid is investigated. The reaction rates and the influence of the nature and structure of a catalyst on k-value of the esterification reaction are determined. Досліджено вплив виду каталізатора на естерифікацію 3-метилкротонової кислоти, визначено константи швидкості та встановлено вплив природи та будови каталізатора на константу рівноваги у реакції естерифікації. 

The features of adipic acid esterification with 1-butanol in the presence of aluminosilicates activated with sulfuric acid as a catalyst have been studied. The optimal process conditions have been determined. The influence of a heterogeneous catalyst nature on the esterification proceeding has been defined. Досліджено закономірності естерифікації адипінової кислоти 1-бутанолом у при- сутності активованих сульфатною кислотою алюмосилікатів як каталізаторів. Визначено оптимальні умови процесу. Встановлено вплив природи гетерогенного каталізатора на перебіг естерифікації.