J. Tao
2009
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Journal
Applied Chemical Industry
Abstract
Dipropylene glycol was synthesized from 1,2-epoxypropane and 1,2-propanediol with amine catalyst.The influence of technological conditions such as:reaction temperature,pressure,time,mole ratio of material and the amount of catalysts were studied.And through the orthogonal experiments,the optimum reaction conditions were obtained:reaction temperature 100 ℃,pressure 202.64 kPa,reaction time 90 min,mole ratio of 1,2-propanediol to 1,2-epoxypropane 2 ∶1,and the mole ratio of catalysts to 1,2-epoxypropane 0.10.The yield of dipropylene glycol was over 83.8%,and the selectivity was up to 91.2%.