Boreskov Institute of Catalysis of the Siberian Branch of Russian ...

PP-IV-2KINETICS & ECOLOGICAL ASPECTS OF THE SYNTHESIS OFACRYLIC ESTERS ON PTC METHODS. Harutyunyan 2 , M. Khachatryan 1 , G. Torosyan 1 , D. Hovhannisyan 31 State Engineering University of Armenia, 105 Teryan, 0009 Yerevan, Republic of Armenia2 Yerevan State Economic University, 128 Nalbandyan, 0025, Yerevan, Republic of Armenia3 Yerevan State University of Architecture & Construction, 105 Teryan, 0009 Yerevan,Republic of ArmeniaThese investigations have allowed to develop the synthesis of unsaturated ethers (as allylfurfuryl, propargyl furfuryl ethers) and esters (as an esters of acrylic and methacrylic acids),which have wide application in industry for the synthesis of unique polymeric materials [1].Procedures based on PTC in the substitutions usually excel over traditional methodsowing to their simplicity, high yields and quality of final products. This method is especiallyvaluable for reaction with compounds sensitive to water [2].The offered method for acrylic ester synthesis in comparison with the traditional methodshas more advantages: high speed of process, soft condition of reaction allowing to lower of apower expenses, the complete exception of application of hazardous and dangerous organicsolvents, by virtue of – it is sharp reduction of air pollution, much smaller volumes of wastewater. It should be note that the in offered synthesis of acrylates the alkylating agent – allylbromide use completely. All of this is devoted to technological problems of the synthesis ofethers in the aspect of protection of an environment.This reaction was carry out in aqueous phase, there acrylic acid is stable [3]. But, it`sknown that reaction systems that lack an aqueous phase are very attractive to chemists.Therefore, we have tried to carry out reaction with smaller amount of water (10N), thushaving solved also ecological task. We hope that the proposal synthesis of acrylic esters willgive the chance for a choice of optimum variants environmentaly friendly technology bycomparison with existing processes.We carry out also the definition of kinetic characteristics of the synthesis of moreinteresting monomer – allyl acrylate. The reaction mixture was heated up to necessarytemperature, which keep up constant during 1 hour. The tests were selected on the analysisevery 10 minutes (fig.). The reaction temperature was varied at the limits of 25-65 °C.Activation energy (E) and K o graphically determined from Arrhenius coordinates:E = 55625 kjoule/kmol (13,28 kkal/mol),k o = 1,922×107 m 3,078 / ( kmol l,026 min).399