能源化学(英文版)

能源化学(英文) ›› 2013, Vol. 22 ›› Issue (6): 833-836.

• ARTICLES • 上一篇    下一篇

Mechanism of chain propagation for the synthesis of polyoxymethylene dimethyl ethers

Yupei Zhao, Zheng Xu, Hui Chen, Yuchuan Fu, Jianyi Shen   

  1. Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu, China
  • 收稿日期:2013-06-20 修回日期:2013-07-16 出版日期:2013-11-20 发布日期:2013-11-28
  • 通讯作者: Yuchuan Fu, Jianyi Shen
  • 基金资助:

    This work was supported by the NSFC (21073088).

Mechanism of chain propagation for the synthesis of polyoxymethylene dimethyl ethers

Yupei Zhao, Zheng Xu, Hui Chen, Yuchuan Fu, Jianyi Shen   

  1. Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu, China
  • Received:2013-06-20 Revised:2013-07-16 Online:2013-11-20 Published:2013-11-28
  • Supported by:

    This work was supported by the NSFC (21073088).

摘要： Polyoxymethylene dimethyl ethers (PODE) were synthesized from the reaction of paraformaldehyde with dimethoxymethane (DMM) over different acid catalysts at different conditions. Products were found to follow the Schulz-Flory distribution law. The chain propagation proceeds through the insertion of an individual segment of CH2O one by one, while the simultaneous insertion of a few CH2O segments or their assembly is unlikely. Due to the restriction of this law, it is difficult to increase the selectivity to the desired products (e.g., PODE3-4).

关键词: polyoxymethylene dimethyl ethers (PODE), diesel additive, chain propagation, product distribution, Schulz-Flory law

Abstract: Polyoxymethylene dimethyl ethers (PODE) were synthesized from the reaction of paraformaldehyde with dimethoxymethane (DMM) over different acid catalysts at different conditions. Products were found to follow the Schulz-Flory distribution law. The chain propagation proceeds through the insertion of an individual segment of CH2O one by one, while the simultaneous insertion of a few CH2O segments or their assembly is unlikely. Due to the restriction of this law, it is difficult to increase the selectivity to the desired products (e.g., PODE3-4).

Key words: polyoxymethylene dimethyl ethers (PODE), diesel additive, chain propagation, product distribution, Schulz-Flory law