椰子油脂肪酸季戊四醇酯的制备

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Coconut oil fatty acid pentaerythritol ester was prepared through the esterification of coconut oil fatty acid and pentaerythritol with p - toluene sulfonic acid as catalyst and toluene as water - entrainer. The optimal reaction conditions were as follows： catalyst dosage 3% （based on the mass of reactants）, molar ratio of coconut oil fatty acid to pentaerythritol 4.4：1 ,water - entrainer toluene dosage 40% （ based on the mass of reactants ） , reaction temperature 150℃ and reaction time 3 h. The esterification rate was 97.2% under the optimal reaction conditions, and the chemical structure of the esterification product was confirmed by FT - IR. The acid value and saponification value of the product were determined as 0.62 mgKOH/g and 254.9 mgKOH/g, respectively. The＇product could 15e used as base oil for green lubricants production.以椰子油脂肪酸（CFA）和季戊四醇（PE）为原料，对甲苯磺酸为催化剂，甲苯为带水剂，通过回流分水酯化法合成椰子油脂肪酸季戊四醇酯。获得优化反应条件为：催化剂对甲苯磺酸用量3％（以反应物质量为基准），酸醇物质的量比4．4：1，带水剂甲苯用量40％（以反应物质量为基准），反应温度150℃，反应时间3h。在此优化条件下，酯化率为97．2％。产物结构经FT―IR光谱证实为椰子油脂肪酸季戊四醇酯（四酯），产物的酸值（KOH）为0．62mg／g，皂化值（KOH）为254．9mg／g，可作为生产绿色酯类润滑油的基础油。