Optimization of Esterification Reaction Conditions for Trimethylolpropane Adipate and Heptanoate
Ester-based oils are a widely used class of synthetic lubricating base oils characterized by their predetermined molecu-lar structures and the absence of unstable impurities found in ordinary mineral oils.The primary feature of polyol ester oils is the polarity imparted by multiple ester bonds within their molecules.Therefore,it is essential to clarify the relationship between the structure and performance of ester-based oils,identify underlying patterns,and synthesize superior ester lubricants to meet the requirements of various operating environments.In particular,the future research focus for polyol ester oils will be on synthesizing high-performance lubricating oils that can operate under harsh conditions to satisfy more demanding application requirements.This paper focuses on the esterification synthesis of triacylglycerol heptanoate from trimethylolpropane,adipic acid,and heptanoic acid using a two-step esterification method under the action of a catalyst.The effects of reaction temperature,reaction time,and catalyst on the esterification reaction were studied,providing valuable reference for the synthesis of polyol ester base oil.
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