Citation: Zhanling Ma, Xiangang Ma, Youming Ni, Hongchao Liu, Wenliang Zhu, Xinwen Guo, Zhongmin Liu. HZSM-35 zeolite catalyzed aldol condensation reaction to prepare acrylic acid and its ester:Effect of its acidic property[J]. Chinese Journal of Catalysis, ;2018, 39(11): 1762-1769. doi: 10.1016/S1872-2067(18)63145-6 shu

HZSM-35 zeolite catalyzed aldol condensation reaction to prepare acrylic acid and its ester:Effect of its acidic property

a National Engineering Laboratory for Methanol to Olefins, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
b State Key Laboratory of Fine Chemicals, PSU-DUT Joint center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China;
c University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 21 June 2018
Revised Date: 16 July 2018

Acrylic acid (AA) and its ester, methyl acrylate (MA), were produced by a green one-step aldol condensation reaction of dimethoxymethane and methyl acetate. The reaction was conducted over ZSM-35 zeolites with different concentrations of Brönsted acid, which were prepared by the sodium ion-exchange process with H-form zeolite. The acidic property of HZSM-35 was studied in detail through infrared experiments. About 51% of all bridging OH groups were distributed in cages, while 23% and 26%, respectively, were distributed in 10-and 8-ring channels. The catalytic performance was enhanced by a high concentration of Brönsted acid, indicating that Brönsted acid is an active site for the aldol condensation reaction. The ZSM-35 zeolite possessing a concentration of Brönsted acid as high as 0.049 mmol/g demonstrated excellent performance with a MA+AA selectivity of up to 73%.
- Aldol condensation,
- Methyl acetate,
- ZSM-35 zeolite,
- Brӧnsted acid,
- Acrylic acid
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