01947nas a2200193   4500008004100000022001400041245010200055210006900157260000800226300001600234490000700250520124600257100001701503700001901520700003601539700002101575700003201596856012501628       2025                        eng d  a0888-588500aAldol Condensation of Furfural with Acetone by Using Mg-Al-O-t-Bu HT Catalyst and Kinetic Studies0 aAldol Condensation of Furfural with Acetone by Using MgAlOtBu HT  cDEC  a24938-249480 v643 a<p>
	An environment-friendly method for producing jet fuel precursors involves the aldol condensation of biomass-derived chemicals. In this study, the condensation reaction between furfural and acetone was performed using a Mg-Al-O-t-Bu hydrotalcite (HT) catalyst, achieving a furfural conversion of 99% and a selectivity of 82% toward 4-(2-furyl)-3-buten-2-one (FAc). The kinetics of the process were evaluated using a Langmuir-Hinshelwood-Hougen-Watson (LHHW) model across a range of temperatures, and the model showed an excellent fit to the experimental data. The effect of different catalysts, reaction temperatures, catalyst loadings, molar ratios, and reaction times was systematically investigated. The Mg-Al-O-t-Bu HT catalyst was extensively analyzed through techniques such as XRD, XPS, FTIR, nitrogen adsorption-desorption measurements, and CO2-TPD. The catalyst exhibited excellent stability, maintaining its performance consistently across five successive reaction cycles with no notable decline in activity. These findings highlight the industrial relevance of Mg-Al-O-t-Bu HT as a robust and recyclable solid base catalyst for biomass upgrading, with strong potential for process scale-up in renewable fuel production.</p>
1 aPatil, Sneha1 aKamble, Paresh1 aVinod, Chathakudath, Prabhakara1 aRathod, Virendra1 aKantam, Mannepalli, Lakshmi  uhttp://library.ncl.res.in/content/aldol-condensation-furfural-acetone-using-mg-al-o-t-bu-ht-catalyst-and-kinetic-studies02711nas a2200193   4500008004100000022001400041245006500055210006300120260000900183300001400192490000700206520208600213100002102299700001902320700002802339700002102367700003202388856009702420       2025                        eng d  a2058-988300aW/HAP catalyzed terpenic alcohols oxidation: kinetic studies0 aWHAP catalyzed terpenic alcohols oxidation kinetic studies  cOCT   a2696-27100 v103 a<p>
	The selective oxidation of natural alcohols into carbonyl derivatives is a pivotal transformation in synthetic organic chemistry and industrial applications. This study focuses on the oxidation of borneol, a bicyclic secondary terpenic alcohol, into camphor using a tungsten-exchanged hydroxyapatite (W/HAP) catalyst and hydrogen peroxide as a green oxidant. Hydroxyapatite was synthesized via co-precipitation and functionalized with sodium tungstate to create the W/HAP catalyst, which was characterized using techniques such as SEM, EDS, TPD, XPS, and N2 adsorption-desorption to evaluate its surface morphology, porosity, and chemical composition. Oxidation reactions were conducted under optimized conditions, employing dimethylacetamide (DMA) as a solvent to achieve maximum conversion and selectivity. The W/HAP catalyst demonstrated superior performance, achieving nearly 99% conversion of borneol with 100% selectivity for camphor. Reaction parameters, including temperature, reactant stoichiometry, solvent choice, and catalyst loading, were systematically investigated. Higher reaction temperatures and oxidant concentrations favoured rapid conversion while maintaining high selectivity. Solvent effects revealed that DMA stabilized peroxo-tungstate intermediates, enhancing reaction efficiency compared to other solvents. Kinetic studies confirmed a first-order reaction mechanism with respect to borneol, and the activation energy was determined to be 44.23 kJ mol-1, highlighting the catalytic efficiency of W/HAP. Reusability tests confirmed the stability of the W/HAP catalyst over multiple cycles with minimal tungsten leaching. The methodology was extended to other terpenic alcohols, with varying degrees of success, emphasizing the substrate-specific activity of the catalyst. This work underscores the potential of tungsten-based heterogeneous catalysts in sustainable alcohol oxidation and highlights the industrial relevance of camphor synthesis as a renewable and eco-friendly approach to produce fine chemicals, fragrances, and pharmaceuticals.</p>
1 aPoman, Aishwarya1 aKamble, Paresh1 aVinod, Chathakudath, P.1 aRathod, Virendra1 aKantam, Mannepalli, Lakshmi  uhttp://library.ncl.res.in/content/whap-catalyzed-terpenic-alcohols-oxidation-kinetic-studies