223754-90-3Relevant articles and documents
Solvent-Free Production of Glycerol Carbonate from Bioglycerol with Urea Over Nanostructured Promoted SnO2 Catalysts
Mallesham, Baithy,Rangaswamy, Agolu,Rao, Bolla Govinda,Rao, Tumula Venkateshwar,Reddy, Benjaram M.
, p. 3626 - 3641 (2020)
Abstract: In this study nanostructured MoO3 and WO3 promoted SnO2 solid acid catalysts were explored for the production of glycerol carbonate via carbonylation of bioglycerol with urea. The investigated reference SnO2 and promoted catalysts were synthesized by fusion and wet-impregnation methods, respectively. The physicochemical properties of the prepared catalysts were thoroughly analyzed by XRD, Raman, BET surface area, TEM, FTIR, pyridine adsorbed FTIR, NH3-TPD, and XPS techniques. It was found from the characterization studies that integration of SnO2 with MoO3 and WO3 promoters leads to remarkable structural, textural, and acidic properties. Especially, a high quantity of acidic sites were observed over the MoO3/SnO2 catalyst (~ 81.45?μmol?g?1) followed by WO3/SnO2 (61.81?μmol?g?1) and pure SnO2 (46.47?μmol?g?1), which played a key role in the carbonylation of bioglycerol with urea. The BET specific surface area and oxygen vacancies of SnO2 were significantly enhanced after the addition of MoO3 and WO3 promoters. TEM images revealed the formation of nanosized particles with a diameter of around 5–25?nm for the synthesized catalysts. The MoO3/SnO2 catalyst exhibited a high conversion and selectivity towards glycerol carbonate in comparison to other catalysts. The observed better performance is attributed to unique properties of MoO3/SnO2 catalyst including smaller crystallite size, high specific surface area, abundant oxygen vacancies, and more number of acidic sites. This catalyst also exhibited remarkable stability with no significant loss of activity in the recycling experiments. Graphic Abstract: Nanostructured MoO3/SnO2 solid acid catalyst exhibited an excellent catalytic activity and a high selectivity to glycerol carbonate in the carbonylation of bioglycerol with urea under solvent-free and mild conditions.[Figure not available: see fulltext.]
Facile synthesis of glycerol carbonate via glycerolysis of urea catalysed by silicotungstates impregnated into MCM-41
Narkhede, Nilesh,Patel, Anjali
, p. 52801 - 52808 (2015)
The present contribution includes the solvent free environmentally benign route towards synthesis of glycerol carbonate via glycerolysis of urea. The parent as well as mono lacunary silicotungstates impregnated into MCM-41 were used as efficient catalysts
Method for preparing high-added-value chemical product through catalysis of glycerin
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Paragraph 0046; 0047; 0056, (2017/03/21)
The invention discloses a method for preparing a high-added-value chemical product through catalysis of glycerin. According to the synthesis method, the fact that activated glycerin is converted into a high-added-value glycerin derivative is taken as a target, activating reaction is carried out in a hydroxyl functionalized ionic liquid system, and glycerin conversion rate data is obtained through a nuclear magnetic characterization means, so that the activation degree of glycerin is evaluated. The preparation method provided by the invention is simple and mild in reaction conditions and replaces a conventional method taking metal as a catalyst; since an ionic liquid catalytic reaction system is used, so that good environment friendliness and repeatability are realized, an ionic liquid preparation process is environment-friendly and good atom economy is realized.
