Kinetic patterns of obtaining of dibutoxyethyl adipates

Abstract

It is known that adipic acid esters are widely used in various industries, for example, as plasticizers, components of aviation synthetic oils, hydraulic and hydraulic brake fluids, and instrument oils. Their advantages are based on low toxicity, environmental safety and biodegradability. In addition, methods for producing adipic acid from renewable raw materials have now been developed. Classic acid catalysis of esterification using sulfuric acid has a number of disadvantages that contribute to a decrease in the yield of the product and its purity, and therefore the process is characterized by additional stages of ester purification, an increase in its cost and the formation of aggressive wastewater. Heterogeneous catalysis is one of the methods of green chemistry. Therefore, the development of new catalysts of this type and the study of the basic principles of synthesis with their participation are relevant. In ester production, the choice of alcohol component is one of the main factors limiting the rate of esterification. In order to optimize the process of obtaining adipate esters, the kinetic patterns of synthesis using ethoxylated alcohols were studied. A mathematical model of the kinetic parameters of adipic acid esterification was developed, which provides maximum yield of the target ester and shorter synthesis duration. The main characteristics of the process of obtaining adipates of ethoxylated alcohols using catalysts of heterogeneous and homogeneous nature are considered.