ЭТЕРИФИКАЦИЯ ГЛИЦЕРИНА НА ГЕТЕРОГЕННОМ КАТАЛИЗАТОРЕ

Abstract

Esterification of glycerol was carried out with benzyl alcohol in the presence of heterogeneous acid catalysts. Spontaneous esterification of benzyl alcohol is observed in all cases. When the reaction is carried out on HZSM-5-zeolite catalysts and Omnikat-210P cracking catalysts, benzylglycerol ether is obtained as the main product in high yield. Research in the field of glycerol esterification allows us to propose solid acid catalysts characterized by acidic properties. Especially HZSM-5 catalyst has high activity in esterification of glycerol with benzyl alcohol. The yields of target products were: 55.2% for monobenzylglycerol ether and 3.5% for dibenzylglycerol ether. The yield of dibenzyl ether was 31.2% and 38.3%, respectively. Despite the relatively high acidity of the HZSM-5 catalyst, the predominance of acid sites of a certain strength helps to increase the yield of monobenzylglycerol ester. The practical inactivity of γ-Al2O3 in this reaction is probably due to its minimal acidity.