It was shown that the reaction mechanism is variable under different experiment conditions, as a whole, the reaction is a competing process between esterification and etherification one another.
结果表明：不同情况下，其反应机理是不同的，总体而言，是一个酯化与醚化相互竞争的过程。
Based on reaction kinetics, the process flow diagram of continuous esterification and reaction conditions were set. The conversion of phthalic anhydride was over 99.8%.
应用酯化反应动力学，确定了连续酯化的流程及操作条件，苯酐的转化率达到99.8%以上。
The process condition was determined by orthogonal test, and the esterification rate of the above reaction reaches to 98%.
用正交实验确定了工艺条件，酯化率达98%。产品性能指标与已二酸二辛酯相近。
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