Aldol condensation of acetic acid with formaldehyde to acrylic acid over Cs(Ce, Nd) VPO/SiO2 catalyst

作者：Wang, Aili; Hu, Jing; Yin, Hengbo^*; Lu, Zhipeng; Xue, Wuping; Shen, Lingqin; Liu, Shuxin

来源：RSC Advances, 2017, 7(76): 48475-48485.

DOI：10.1039/c7ra09778f

• N-BUTANE OXIDATION
• VANADIUM PHOSPHORUS OXIDES
• P-O CATALYSTS
• MALEIC-ANHYDRIDE
• VPO CATALYSTS
• LACTIC-ACID
• PHOTOELECTRON-SPECTROSCOPY
• DEHYDRATION
• SURFACE
• ALKALI

Cs, Ce, and Nd cation-modified VPO/SiO2 catalysts were prepared by a deposition method. The VPO/SiO2 catalyst was composed of VOPO4 and (VO)(2)P2O7 phases. When Cs, Ce, and Nd cations were added in the VPO/SiO2 catalyst, Cs4P2O7, CePO4, and NdPO4 were formed and V5+/V4+ ratio increased, respectively. The basicities of the metallic cation-modified catalysts increased while their acidities exhibited maximum values with the increase in the ratios of metallic cation to vanadium. The metallic cation-modified VPO/SiO2 catalysts exhibited higher catalytic activities for the aldol condensation reaction of acetic acid with formaldehyde to acrylic acid than the VPO/SiO2 catalyst. The high acidity and basicity of the metallic cation-modified VPO/SiO2 catalysts favored the formation of acrylic acid.

• 出版日期2017
• 单位江苏大学; 绵阳师范学院