56920-82-2Relevant articles and documents
Recognizing soft templates as stimulators in multivariate modulation of tin phosphate and its application in catalysis for alkyl levulinate synthesis
Manjunathan, Pandian,Shanbhag, Dhanush Y.,Vinu, Ajayan,Shanbhag, Ganapati V.
, p. 272 - 282 (2021/01/28)
Catalyst synthesis is an art where an inefficient material can be remarkably converted into a highly active and selective catalyst by adopting a suitable synthetic strategy to tune its properties during synthesis. The underlying principle of the strategy presented here is the integration of tailoring the structural and chemical behavior of tin phosphates with tuned catalytic active centers directed by employing different structure directing agents (SDAs) and the attempt to understand this in detail. It is demonstrated how soft templates can be effectively used for their so far unknown utilization of tuning the active sites in phosphate containing catalysts. We found that, by using an appropriate synthesis strategy, it is possible to tune and control explicitly both the catalyst morphology and the nature of active sites at the same time. The 31P MAS NMR study revealed that employing SDAs in the synthesis strongly influenced the nature and amount of phosphate species in addition to porosity. The resultant different nanostructured SnPO catalysts were investigated for one-pot synthesis of alkyl levulinates via alcoholysis of furfuryl alcohol. Among the catalysts, SnPO-P123 exhibited greater butyl levulinate yield via alcoholysis of furfuryl alcohol with n-butanol and the study was extended to synthesize different alkyl levulinates. Importantly, the active sites in the SnPO-P123 catalyst responsible for the reaction were elucidated by a study using 2,6-lutidine as a basic probe molecule. This study therefore provides an avenue for rational design and construction of highly efficient and robust nanostructured SnPO catalysts to produce alkyl levulinates selectively. This journal is
Hydrothermal carbon enriched with sulfonic and carboxyl groups as an efficient solid acid catalyst for butanolysis of furfuryl alcohol
Yang, Jinfan,Zhang, Hongyu,Ao, Zhifeng,Zhang, Sufeng
, p. 109 - 113 (2019/07/02)
Carbonaceous material (GC-PTSA-AC) functionalized with both high density of SO3H and COOH groups was prepared by one-step hydrothermal carbonization of glucose with p-toluenesulfonic acid and acrylic acid. This novel carbon could be used directly for the alcoholysis of furfuryl alcohol and n-butanol without any post-modification, and it was found to be more efficient than the monofunctional hydrothermal carbon only decorated with SO3H or COOH groups. The reason was attributed to the larger amount of COOH groups on GC-PTSA-AC, cooperating with the SO3H active sites to facilitate the butanolysis reaction.
Alcoholysis of Furfuryl Alcohol into n-Butyl Levulinate Over SBA-16 Supported Heteropoly Acid Catalyst
Siva Sankar, Enumula,Saidulu Reddy,Jyothi, Yadagiri,David Raju, Burri,Rama Rao, Kamaraju Seetha
, p. 2807 - 2816 (2017/09/14)
Abstract: In this work, n-butyl levulinate a potential renewable chemical in the energy sector and in the field of fine chemical synthesis has been synthesized via alcoholysis of furfuryl alcohol in batch process at atmospheric pressure over SBA-16 supported tungstophosphoric acid (TPA) catalyst. In order to characterize and correlate the catalytic activity, the wet impregnated TPA/SBA-16 catalysts were subjected to the physico chemical characterization techniques such as X-ray diffraction, N2-physisorption, SEM, TEM, FT-IR, NH3-TPD and pyridine adsorbed FT-IR analysis. The retention of 3D mesoporous structure and TPA structure even after impregnation was confirmed by XRD and N2-physisorption. The impregnation of TPA over SBA-16 creates the more number of available active acidic sites for the reactants. 25?wt% TPA/SBA-16 offers 97% selectivity to n-butyl levulinate with complete conversion of furfuryl alcohol in 3?h. Various reaction parameters were optimized to achieve the best catalytic activity. These results imply that the conversion of furfuryl alcohol to n-butyl levulinate go on with the formation of the intermediate 2-butoxymethylfuran. The recyclability of the catalyst and characterization of the spent catalyst was also studied. Graphical Abstract: [Figure not available: see fulltext.] SBA-16 supported TPA catalyst is effective in the conversion of furfuryl alcohol to n-butyl levulinate at atmospheric pressure.
