聚甲醛
化学平衡
化学
平衡常数
选择性
热力学平衡
动态平衡
化学反应
硫酸化
催化作用
物理化学
有机化学
热力学
聚合物
生物化学
物理
作者
Huaju Li,Huanling Song,Feng Zhao,Liwei Chen,Chungu Xia
标识
DOI:10.1016/s2095-4956(15)60307-2
摘要
The chemical equilibrium and reaction kinetic behavior in the synthesis of polyoxymethylene dimethyl ethers (DMMn) were investigated over sulfated titania in order to reveal the decisive factor controlling the reaction. The results showed that the molar ratio of adjacent DMMn products in equilibrium solution had the same value, which depended absolutely on the reaction temperature. Meanwhile, the reactions had the same DMMn products distributions under varied reaction conditions. The equilibrium constants of the related step-wise reactions for DMMn formation were equal, which were calculated based on the bulk compositions of the reaction solution. And thus, the selectivity to DMMn was mainly controlled by the chemical equilibrium, i.e., thermodynamic control. In brief, the present results provide some guidance for future synthesis of DMMn.
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