Features of triamyl citrate synthesis

Objectives. To find an effective way for obtaining triamyl citrate, environmentally friendly, biodegradable citric acid ester used as a plasticizer PVC-based polymer compositions. Methods. The possibilities of heterogeneous catalysis were analyzed using the case study three commercial samples macroporous sulfocationites (Amberlyst™ 15, Amberlyst™ 70, and TULSION® 66). Homogeneous was studied example orthophosphoric (H 3 PO 4 ), while self-catalysis investigated during esterification with amyl alcohol (ROH). syntheses carried out under identical conditions: T = 110 °C, ratio CA:ROH 1:5 (mol) amount catalyst 1 wt % on reaction mass in thermostatically controlled reactor ideal mixing continuous distillation resulting water. Results. It found that all variants (even conditions), conversion 180 min reached 94–99%. Triamyl citrate formed after 9 h yield 90% only when homogeneous (H3PO4) presence sample (Amberlyst ™ 15). Conclusions. revealed differences reactivity Amberlyst 66) confirm well-known theoretical positions, according to which kinetic pseudo-homogeneous model process hydroxy acids excess aliphatic alcohols is based law acting masses depends specific surface area catalyst, 15 greatest importance compared 70 66 (m 2 /g): 53:36:35, respectively.