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菜籽油酯交换制备脂肪酸异辛酯
Preparation of fatty acid isooctyl ester by transesterification of rapeseed oil
  
DOI：
中文关键词:  菜籽油  甲醇钠  酯交换  脂肪酸异辛酯
英文关键词:rapeseed oil  sodium methoxide  transesterification  fatty acid isooctyl ester
基金项目:
Author NameAffiliation
WANG Houzheng State Key Laboratory of Food Science and Technology，Jiangnan University，Wuxi 214122，Jiangsu，China 
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中文摘要:
      ：菜籽油与异辛醇在甲醇钠的催化作用下通过酯交换反应制备脂肪酸异辛酯。研究了催化剂添加量、醇油摩尔比、反应温度、反应时间对酯交换产物脂肪酸酯含量的影响，并对产物进行结构表征、组成分析和低温性能评价。结果表明：最佳酯交换工艺条件为醇油摩尔比5∶ 1、催化剂添加量06%（以油质量计）、反应温度50 ℃、反应时间20 min，在最佳条件下产物中脂肪酸酯含量为9513%；产物中脂肪酸异辛酯含量达到86.23%，主要为油酸异辛酯，含量为58.06%；产物凝点为-32 ℃，较菜籽油（凝点-18 ℃）大幅降低。
英文摘要:
      Rapeseed oil and isooctanol were catalyzed by sodium methoxide to prepare fatty acid isooctyl ester through transesterification reaction. The effects of catalyst dosage, molar ratio of isooctanol to rapeseed oil, reaction temperature and reaction time on the content of fatty acid ester were studied. The structure, composition and low temperature performance of the products were evaluated. The results showed that the optimal transesterification process conditions were obtained as follows: molar ratio of isooctanol to rapeseed oil 5∶ 1, catalyst dosage 0.6% (based on oil mass), reaction temperature 50 ℃ and reaction time 20 min. Under these conditions, the content of fatty acid ester in the product was 9513%, and the content of fatty acid isooctyl ester reached 86.23%, mainly isooctyl oleate (5806%). The freezing point of the product was-32 ℃, much lower than that of rapeseed oil (-18 ℃).
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