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Synthesis, Identification, and Isolation of Esters of Pentaerythritol and Linear С4–С7 Carboxylic Acids
Petroleum Chemistry ( IF 1.4 ) Pub Date : 2021-07-30 , DOI: 10.1134/s0965544121090048
V. V. Emelyanov 1 , E. L. Krasnykh 1 , D. A. Fetisov 1 , S. V. Levanova 1 , V. A. Shakun 1
Affiliation  

Abstract

Various procedures for thermal esterification of individual monobasic С4–С7 carboxylic acids with pentaerythritol in an excess of the corresponding acid in the presence of a solvent or without it in combination with azeotropic distillation of water released in the reaction were studied. Four tetraesters of pentaerythritol (PE) and C4–C7 acids were synthesized, isolated, and purified (to ≥99 wt % purity according to GLC) and were identified by GC–MS. The physicochemical characteristics of the products were determined. The dependence of the induction effect determined by the alkyl chain length in the acid molecule on the esterification rate was studied; at 100–110°C, 90% yield was reached in 30 h for PE tetrabutyrate and in 13–14 h for С5–С7 tetraesters. The purity of the tetraesters was higher than 99 wt % after the purification, and the yield was 78–85%.



中文翻译:

季戊四醇酯和直链 С4-С7 羧酸酯的合成、鉴定和分离

摘要

个别一元С的热酯化各种程序47进行了研究在溶剂的存在下或没有它与在反应中释放的水的共沸蒸馏组合羧酸与季戊四醇在过量的相应酸的。季戊四醇 (PE) 和 C 4 –C 7 的四种四酯酸被合成、分离和纯化(根据 GLC 达到 ≥ 99 wt % 纯度)并通过 GC-MS 进行鉴定。测定了产物的理化特性。研究了酸分子中烷基链长决定的诱导效应对酯化速率的依赖性;在 100–110°C 下,PE 四丁酸酯在 30 小时内达到 90% 的产率,而对于 С 5 –С 7四酯则在 13-14 小时内达到。纯化后四酯的纯度高于99wt%,产率为78-85%。

更新日期:2021-08-01
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