| Efficient synthesis of poly(oxymethylene) dimethyl ethers over PVP-stabilized heteropolyacids through self-assembly |
| |
| 作者姓名： | Xiaolong Fang Jin Chen Linmin Ye Haiqiang Lin Youzhu Yuan |
| |
| 作者单位： | State Key Laboratory of Physical Chemistry for Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols,Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University |
| |
| 摘 要： | A series of polyvinylpyrrolidone-stabilized heteropolyacids(PVP-HPAs)are generated by self-assembly of HPAs and PVP in methanol.The PVP-HPAs are then employed as catalysts for the synthesis of poly(oxymethylene)dimethyl ethers(DMMn,n1)by the methanolysis of trioxane.The results suggest that the acidity of PVP-HPAs is tunable by changing the ratio of PVP and HPAs,which is a key factor for the selectivity of the DMMn product.By optimizing the composition and reaction conditions,two types of PVP-HPA,PVP-phosphotungstic acid(PVP-HPW)in a PVP/HPW ratio of 1/4:1 and PVP-silicotungstic acid(PVP-HSi W)in a PVP/HSi W ratio of 1/4:3/4,respectively afford 52.4%and 50.3%yields of DMM2–5.The optimized catalysts are reusable for a minimum of 10 times without a significant drop in performance.
|
| 关 键 词： | assembly stabilized selectivity acidity afford polymerization methanol reusable tunable conjugated |
Efficient synthesis of poly(oxymethylene) dimethyl ethers over PVP-stabilized heteropolyacids through self-assembly |
| |
| Xiaolong Fang,Jin Chen,Linmin Ye,Haiqiang Lin,Youzhu Yuan.Efficient synthesis of poly(oxymethylene) dimethyl ethers over PVP-stabilized heteropolyacids through self-assembly[J].中国科学 化学(英文版),2015(1):131-138. |
| |
| Abstract: | |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
