80-69-3Relevant articles and documents
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Pedersen
, p. 1634,1637, 1638 (1955)
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Glycerol Selective Oxidation to Lactic Acid over AuPt Nanoparticles; Enhancing Reaction Selectivity and Understanding by Support Modification
Douthwaite, Mark,Ford, Grayson,Garcia, Tomas,He, Qian,López, José Manuel,Morgan, David J.,Powell, Natasha,Sanahuja-Parejo, Olga,Solsona, Benjamin,Taylor, Aoife,Taylor, Stuart H.,Yang, Nating
, (2020/05/25)
A high surface area mesoporous TiO2 material (110 m2/g) was synthesised using a nanocasting methodology, utilizing SBA-15 as a hard template. This material was subsequently used as a support to prepare a series of 1 wt.% AuPt/TiO2 catalysts, synthesised by conventional impregnation and sol-immobilisation. Catalysts were tested for the oxidation of glycerol to lactic acid and their performance was compared with corresponding catalysts supported on TiO2?P25, TiO2-anatase and TiO2-rutile. Higher rates of reaction and higher selectivity to lactic acid were observed over nanocast TiO2 supported catalysts. The increased performance of these catalysts was attributed to the presence of Si on the surface of the support, which likely arose from inefficient etching of the SBA-15 template. The presence of Si in these catalysts was confirmed by X-ray photoelectron spectroscopy and electron energy loss spectroscopy. It was proposed that the residual Si present increases the Br?nsted acidity of the TiO2 support, which can lead to the formation of Lewis acid sites under reaction conditions; both sites are known to catalyse the dehydration of a primary alcohol in glycerol. Typically, under alkaline conditions, lactic acid is formed by the nucleophilic abstraction of a hydrogen. Thus, we propose that the improved selectivity to lactic acid over the nanocast TiO2 supported catalyst is attributed to the co-operation of heterogeneous and homogeneous dehydration reactions, as both compete directly with a direct oxidation pathway, which leads to the formation of oxidation products such as glyceric and tartronic acid.
Method for synthesizing tartronic acid by using basic nitrogen-doped mesoporous carbon-material-supported Pt catalyst
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Paragraph 0047-0079, (2019/12/29)
The invention discloses a method for synthesizing tartronic acid by using a basic nitrogen-doped mesoporous carbon-material-supported Pt catalyst. The method comprises the following steps: s1, preparing a nitrogen-doped mesoporous carbon material with a -Ph-O-Mg or -Ph-O-Ca structure; s2, preparing the basic nitrogen-doped mesoporous carbon-material-supported Pt catalyst by utilizing the nitrogen-doped mesoporous carbon material; and s3, catalyzing oxidation of glycerol by using the basic nitrogen-doped mesoporous carbon-material-supported Pt catalyst so as to prepare tartronic acid. The catalyst provided by the invention is adopted to catalyze the oxidation of glycerol to prepare tartronic acid, and has the advantages of simple and diverse synthesis methods, wide raw material sources, lowcost, strong alkalinity, mild reaction conditions, high stability and easiness in recycling.
