Aldol condensation of acetic acid with formaldehyde to acrylic acid over Cs(Ce, Nd) VPO/SiO2 catalyst. Issue 76 (16th October 2017)

• Record Type: Journal Article
• Authors: Wang, Aili; Hu, Jing; Yin, Hengbo; Lu, Zhipeng; Xue, Wuping; Shen, Lingqin; Liu, Shuxin
• Is Part Of: RSC advances. Volume 7:Issue 76(2017)
• Page Start: 48475
• Page End: 48485
• Publication Date: 2017-10-16
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra09778f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The Cs-, Ce-, and Nd-modified VPO/SiO2 exhibited higher activity for aldol condensation of acetic acid with formaldehyde to acrylic acid. Abstract : 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 P2 O7 phases. When Cs, Ce, and Nd cations were added in the VPO/SiO2 catalyst, Cs4 P2 O7, CePO4, and NdPO4 were formed and V 5+ /V 4+ 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.