4394-68-7Relevant academic research and scientific papers
Highly regioselective preparation of 1,3-Dioxolane-4-methanol derivatives from glycerol using phosphomolybdic acid
Fadnavis, Nitin Wasantrao,Reddipalli, Gowri Sankar,Ramakrishna, Gadupudi,Mishra, Mithilesh Kumar,Sheelu, Gurrala
, p. 557 - 560 (2009)
Phosphomolybdic acid (PMA) forms a blue-colored complex with glycerol in a 1:10 molar ratio. The glycerolato complex catalyzes conversion of glycerol into 1,3-dioxolane-4-meth-anol derivatives with complete regiospecificity in high yields (>95%) and the catalyst can be recycled up to ten times without loss of activity or regiospecificity. Georg Thieme Verlag Stuttgart.
Structure–Activity Relationships of WOx-Promoted TiO2–ZrO2 Solid Acid Catalyst for Acetalization and Ketalization of Glycerol towards Biofuel Additives
Baithy, Mallesham,Mukherjee, Deboshree,Rangaswamy, Agolu,Reddy, Benjaram M.
, (2021/07/25)
Abstract: WOx-promoted TiO2–ZrO2 solid acid catalyst was prepared and applied in the catalytic acetalization and ketalization of glycerol with carbonyl compounds to produce biofuel additives. The presence of WOx promoter and TiO2 remarkably improved the catalytic activity of ZrO2. Approximately, 100% glycerol conversion was evidenced with non-bulky aliphatic aldehydes and ketones like, propanol and cyclohexanone. The physical characterization of WOx-promoted TiO2–ZrO2, revealed a higher formation of tetragonal crystalline phase of ZrO2, over monoclinic. The total surface acidity and the ratio of Br?nsted to Lewis acidic site concentrations were determined by NH3-TPD and pyridine-chemisorbed FTIR spectroscopy, respectively. A considerably higher concentration of Lewis acidic sites, ~ 213.29?μmol/gm, was evidenced on the WOx-promoted TiO2–ZrO2 catalyst surface. Catalytic activity study revealed a direct correlation between the surface Lewis acidic site concentration and the activity of catalyst. This significant observation indicated the key role of Lewis acidic sites in this catalytic process. The WOx-promoted TiO2–ZrO2 catalyst was also considerably stable and showed good performance in the acetalization/ketalization of glycerol with other substituted carbonyl compounds. Graphic Abstract: The WOx-promoted TiO2–ZrO2 solid acid catalyst exhibits superior catalytic performance for acetalization and ketalization of glycerol with carbonyl compounds to produce biofuel additives. [Figure not available: see fulltext.].
