Cooperative catalytic effects between the penta-coordinated Al and Al2O3 in Al2O3-AlPO4 for aldol condensation of methyl acetate with formaldehyde to methyl acrylate

Zhenyu Wu; Zengxi Li; Chunshan Li

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Cooperative catalytic effects between the penta-coordinated Al and Al₂O₃ in Al₂O₃-AlPO₄ for aldol condensation of methyl acetate with formaldehyde to methyl acrylate

Full Length Article | Updated：2026-01-06

- Cooperative catalytic effects between the penta-coordinated Al and Al₂O₃ in Al₂O₃-AlPO₄ for aldol condensation of methyl acetate with formaldehyde to methyl acrylate
- Chinese Journal of Chemical Engineering Vol. 52, Issue 12, Pages: 172-183(2022)
- Affiliations：
  
  1. School of Chemical Science, University of Chinese Academy of Sciences,Beijing,China,100049
  2. Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences,Beijing,China,100190
  3. Zhongke Langfang, Institute of Process Engineering, Chinese Academic of Sciences,Hebei,China,065000
- Author bio：
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- Published：2022
- Accepted：
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摘要

Abstract

The bare amorphous Al

-AlPO

and Cs/Al

-AlPO

catalysts were developed for the aldol condensation of methyl acetate with formaldehyde to methyl acrylate. The structure and property of catalyst were characterized by XRD

XPS

BET

Pyridine-IR

FT-IR

Al-MASNMR

-/CO

-TPD and SEM. The correlation between structural features and acid-base properties was established

and the loading effect of the cesium species was investigated. Due to cooperative catalytic effects between the penta-coordinated Al and Al

the weak-II acid and medium acid site densities and the product selectivity were improved. While the basic site densities of these catalysts were almost in proportion to the conversion of methyl acetate. The loaded Cs could form new basic sites and change the distribution of acid sites which further enhance the catalytic performance. As a result

the 10Cs/8AlP was proved to be an optimal catalyst with the yield and selectivity of 21.2% and 85% for methyl acrylate respectiv

ely. During the reaction

a deactivation behavior was observed on 10Cs/8AlP catalyst due to the carbon deposition

however

it could be regenerated by thermal treatment in the air atmosphere at 400 ℃.

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