THE INFLUENCE OF SOME FACTORS ON THE CATALYTIC SYNTHESIS OF VINYL ESTERS OF CARBOXYLIC ACIDS

vinyl esters, vinylation reactions, heterogeneous catalysis, carboxylic acids, pelargonic acid, enantiic acid, valerian acid, catalyst, aluminum oxide, activated carbon.

Authors

  • Саида МУРАТОВА Национальный Университет Узбекистана преподователь кафедры «Общей и нефтегазовая химия», Uzbekistan
  • Суванкул НУРМАНОВ Национальный Университет Узбекистана д.т.н., профессор кафедры «Общей и нефтегазовая химия» , Uzbekistan

The study of the reaction of vinylation of pelargonic, enanthic and valeric acids and the influence of the nature of catalysts and temperature on the process of heterogeneous catalytic vinylation showed that in all cases their vinyl esters are formed. Based on the data of the study, it is observed that aluminum oxide is more active as a catalyst carrier than activated carbon. This is due to the fact that aluminum oxide is not only a carrier, but also performs the function of a catalyst activator. It was also found that the zinc salt of each carboxylic acid is an active catalyst for the vinylation of this particular acid. On the basis of the studies of vinylation of carboxylic acids, it was found that with an increase in the molecular weight of aliphatic carboxylic acids, the yields of their vinyl esters significantly decrease. Valeric acid is more active than enanthic and pelargonic acids. The yields of their vinyl esters are 57.2%, 63.4% and 79.3%, respectively.