Category: 97-99-4

Du, Hong; Ma, Xiuyun; Jiang, Miao; Yan, Peifang; Conrad Zhang, Z. published the artcile< Highly efficient Cu/SiO2 catalyst derived from ethanolamine modification for furfural hydrogenation>, Recommanded Product: (Tetrahydrofuran-2-yl)methanol, the main research area is copper SiO2 catalyst ethanolamine furfural hydrogenation.

The production of furfuryl alc. from furfural hydrogenation in gas phase is of great significance for the valorization of biomass. The existing catalyst for this transformation suffers from high cost and complex preparation process. Thus, a highly efficient copper catalyst was developed by a simple impregnation method using ethanolamine modified granular silica as carrier. The catalytic performance was related to the amount of ethanolamine used in modification. Highly dispersed copper with uniform particle size distribution was obtained from appropriate amount of ethanolamine modified granular silica. The ethanolamine modified granular silica (mass ratio between ethanolamine and silica was 3 in the initial modification mixture) supported copper catalyst exhibited the best performance in terms of catalyst lifetime thanks to its maximum amount of Cu0 sites and largest amount of Cu+ sites. A slow deactivation of the catalyst after extended time on stream evaluation is attributed to carbon deposition and slow copper sintering.

Applied Catalysis, A: General published new progress about Hydrogenation. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Recommanded Product: (Tetrahydrofuran-2-yl)methanol.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Li, Zhuo-Fei; Shen, Yan; Cui, Wen-Gang; Zhang, Qiang; Hu, Tong-Liang published the artcile< MOF derived non-noble metal catalysts to control the distribution of furfural selective hydrogenation products>, Application In Synthesis of 97-99-4, the main research area is metal organic framework catalyst furfural selective hydrogenation.

Furfural, as one of the most important and attractive platform mols., could produce high-value chems. through selective hydrogenation, which had attracted wide attention in recent years. Hereon, a ZnCo bimetal ZIF (ZnCo-ZIF-US) was quickly and efficiently prepared by an ultrasonic-assisted method, and a series of nitrogen-doped carbon-coated bimetallic composites (ZnCo-US@NC-T, T refers to the calcination temperature) were prepared by a one-step calcination technique from ZnCo-ZIF-US and their structures were characterized in detail by PXRD, SEM, TEM, and XPS, etc. The obtained ZnCo-US@NC-700 showed higher catalytic performance in the selective hydrogenation of furfural to furfuryl alc. than the derivatives of ZnCo bimetal ZIF prepared without ultrasonic-assisted. Surprisingly, the results showed the presence or absence of Zn in the catalysts could regulate the hydrogenation products of furfural to produce furfuryl alc. or tetrahydrofurfuryl alc. In addition, the catalyst could be recycled with almost no significant change in catalytic performance and its microstructure was still well maintained. This work provides an ingenious strategy for the selective regulation of biomass products.

Molecular Catalysis published new progress about Adsorption. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Application In Synthesis of 97-99-4.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Stokes, P. W.; Foster, S. P.; Casey, M. J. E.; Cocks, D. G.; Gonzalez-Magana, O.; de Urquijo, J.; Garcia, G.; Brunger, M. J.; White, R. D. published the artcile< An improved set of electron-THFA cross sections refined through a neural network-based analysis of swarm data>, Electric Literature of 97-99-4, the main research area is alpha tetrahydrofurfuryl alc electron transport neural network simulation.

We review exptl. and theor. cross sections for electron transport in α-tetrahydrofurfuryl alc. (THFA) and, in doing so, propose a plausible complete set. To assess the accuracy and self-consistency of our proposed set, we use the pulsed-Townsend technique to measure drift velocities, longitudinal diffusion coefficients, and effective Townsend first ionization coefficients for electron swarms in admixtures of THFA in argon, across a range of d.-reduced elec. fields from 1 to 450 Td. These measurements are then compared to simulated values derived from our proposed set using a multi-term solution of Boltzmann’s equation. We observe discrepancies between the simulation and experiment, which we attempt to address by employing a neural network model that is trained to solve the inverse swarm problem of unfolding the cross sections underpinning our exptl. swarm measurements. What results from our neural network-based anal. is a refined set of electron-THFA cross sections, which we confirm is of higher consistency with our swarm measurements than that which we initially proposed. We also use our database to calculate electron transport coefficients in pure THFA across a range of reduced elec. fields from 0.001 to 10 000 Td. (c) 2021 American Institute of Physics.

Journal of Chemical Physics published new progress about Anodes. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Electric Literature of 97-99-4.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Cocq, Aurelien; Leger, Bastien; Noel, Sebastien; Bricout, Herve; Djedaini-Pilard, Florence; Tilloy, Sebastien; Monflier, Eric published the artcile< Anionic Amphiphilic Cyclodextrins Bearing Oleic Grafts for the Stabilization of Ruthenium Nanoparticles Efficient in Aqueous Catalytic Hydrogenation>, Recommanded Product: (Tetrahydrofuran-2-yl)methanol, the main research area is oleic succinyl beta cyclodextrin ruthenium nanoparticle catalyst preparation; petrosource biosource unsaturated compound benzene furfural hydrogenation ruthenium catalyst.

Oleic succinyl β-cyclodextrin was proved to be efficient for the stabilization of ruthenium nanoparticles (NPs) in aqueous medium. The catalytic activity of these NPs was evaluated in the aqueous hydrogenation of petrosourced and biosourced unsaturated compounds such as benzene and furfural derivatives The catalytic system can be easily recycled and reused up to nine runs without any loss of activity and selectivity, demonstrating its robustness.

ChemCatChem published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Recommanded Product: (Tetrahydrofuran-2-yl)methanol.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Paraja, Miguel; Hao, Xiaoyu; Matile, Stefan published the artcile< Polyether Natural Product Inspired Cascade Cyclizations: Autocatalysis on π-Acidic Aromatic Surfaces>, Application In Synthesis of 97-99-4, the main research area is oligooxolane preparation; oligoepoxide preparation cascade ring opening cyclization autocatalysis kinetics; autocatalysis; cyclization; polyethers; synthetic methods; π interactions.

Anion-π catalysis functions by stabilizing anionic transition states on aromatic π surfaces, thus providing a new approach to mol. transformation. The delocalized nature of anion-π interactions suggests that they serve best in stabilizing long-distance charge displacements. Aiming therefore for an anionic cascade reaction that is as charismatic as the steroid cyclization is for conventional cation-π biocatalysis, reported here is the anion-π-catalyzed epoxide-opening ether cyclizations of oligomers. Only on π-acidic aromatic surfaces having a pos. quadrupole moment, such as hexafluorobenzene to naphthalenediimides, do these polyether cascade cyclizations proceed with exceptionally high autocatalysis (rate enhancements kauto/kcat >104 M-1). This distinctive characteristic adds complexity to reaction mechanisms (Goldilocks-type substrate concentration dependence, entropy-centered substrate destabilization) and opens intriguing perspectives for future developments.

Angewandte Chemie, International Edition published new progress about Autocatalysis. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Application In Synthesis of 97-99-4.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Modelska, Magdalena; Binczarski, Michal J.; Dziugan, Piotr; Nowak, Szymon; Romanowska-Duda, Zdzislawa; Sadowski, Adam; Witonska, Izabela A. published the artcile< Potential of waste biomass from the sugar industry as a source of furfural and its derivatives for use as fuel additives in Poland>, Related Products of 97-99-4, the main research area is furfural biomass lignocellulosic waste fuel additive.

Poland is one of the leading producers of sugar from sugar beet in Europe. However, the production of sugar generates large amounts of lignocellulosic waste, in the form of beet pulp and leaves. Currently, this waste is not reutilized in the chem. industry, but is only used as food for farm animals. This paper assesses the potential of using bio-waste from the sugar industry as a raw material for the production of furfurals via acid hydrolysis. Further processing of furfural into derivatives such as furfuryl alc. (FA) or tetrahydrofurfuryl alc. (THFA) could increase the economic profitability of the initiative. Furfuryl alc. can be used as a fuel additive in sugar factories. Tetrahydrofurfuryl alc. can be used as a component in agricultural fertilizers, increasing the yield of sugar beet. This approach reduces the amount of post-production waste and brings the sugar industry closer to the concept of a circular economy.

Energies (Basel, Switzerland) published new progress about Beta vulgaris saccharifera, pulp, silage. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Related Products of 97-99-4.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Chen, Lifang; Ye, Jingyun; Yang, Yusen; Yin, Pan; Feng, Haisong; Chen, Chunyuan; Zhang, Xin; Wei, Min; Truhlar, Donald G. published the artcile< Catalytic Conversion Furfuryl Alcohol to Tetrahydrofurfuryl Alcohol and 2-Methylfuran at Terrace, Step, and Corner Sites on Ni>, Formula: C5H10O2, the main research area is nickel catalytic conversion furfuryl alc tetrahydrofurfuryl alc methylfuran.

The surface structures at catalytic sites are critical factors for determining catalytic selectivity. Here, we use periodic d. functional theory and microkinetic modeling to systematically investigate the effect of surface structures on the conversion of furfuryl alc. (FA). We consider nine surface terminations of Ni with various coordination numbers representing terrace, step, and corner sites. We study three reaction paths for FA conversion on various surfaces and find that the surface structure impacts the adsorption configuration and causes significant differences in selectivity. Barrier height anal. shows that terrace sites favor hydrogenation to tetrahydrofurfuryl alc. (THFA), whereas corner sites favor C-OH bond scission to produce 2-methylfuran (2-MF); step sites show similar barriers for the two reactions. We explain this by identifying three characteristics of the reactant adsorption structures that have a significant effect on selectivity, namely, that a shorter distance between the adsorbed hydrogen atom and the C3 carbon of FA favors hydrogenation to produce THFA, and more neg. charge transfer to Oalcohol and a longer C-Oalcohol bond length favor C-Oalcohol bond scission to produce 2-MF. Since the reactions have similar barriers at a step site, microkinetic calculations are employed to calculate the product selectivity on a step site under exptl. conditions. At lower temperatures and higher generalized coordination number (CN), THFA is the most favorable product, while the selectivity to 2-MF is higher at lower CN and at higher temperature This work provides guidance for the rational design catalysts to control the product distribution of FA conversion.

ACS Catalysis published new progress about Adsorption. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Formula: C5H10O2.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Qin, Yaqiong; Wang, Bing; Liu, Shaofeng; Pan, Lining; Chen, Mantang; Cui, Huapeng; Liu, Ruihong; Jia, Yunzhen; Cai, Junlan; Liu, Kejian; Wang, Xiaoyu; Xie, Fuwei published the artcile< Robust, comprehensive, sensitive analysis of flavour additives with carboxyl and hydroxyl groups in cigarette smoke combining silylation and gas chromatography-tandem mass spectrometry with an improved backflushing system>, Application In Synthesis of 97-99-4, the main research area is silylation GC MS backflushing system flavor additives; Backflushing; Cigarette smoke; Derivatization; Flavour additives; GC-MS/MS.

Flavor additives with carboxyl and hydroxyl groups (FACHs), the key ingredients in characteristic flavours, are frequently detected in cigarette smoke. They are attracting increasing attention in regulating the flavor additives used in tobacco to curb youth tobacco use and prevent the use of additives that are harmful. In this study, a highly robust, sensitive, and precise method based on silylation and GC-MS/MS with an improved backflushing system was developed for the simultaneous anal. of 171 FACHs in cigarette smoke. Silylation has been shown to have advantages in terms of high selectivity and sensitivity to chems. with carboxyl and hydroxyl groups, especially when combined with GC-MS/MS. The extraction and silylation conditions were optimized. Dichloromethane was used as the extraction agent. BSTFA in combination with 1% TMCS and 0.2% TMSI was selected as silylating agent for high silylation efficiency, particularly for hindered analytes. The method has been validated. The limit of detection (LOD) ranged from 0.6 to 332.3 ng/mL. 91.1% out of the analytes in QC samples had precisions lower than 10% during one month run. The improved backflushing system with a fused silica splitter was shown to be crucial in the excellent long-term robustness of the method. The developed method was used to determine flavor additives in 270 practical cigarette smoke samples with reliable results. A total of 154 FACHs were identified with wide-range levels among different cigarette brands.

Journal of Chromatography A published new progress about Food additives (flavor). 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Application In Synthesis of 97-99-4.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Mironenko, Roman M.; Belskaya, Olga B.; Likholobov, Vladimir A. published the artcile< Approaches to the synthesis of Pd/C catalysts with controllable activity and selectivity in hydrogenation reactions>, Quality Control of 97-99-4, the main research area is review palladium carbon hydrogenation catalyst.

A review. C-supported Pd catalysts are widely used for hydrogenation of various organic compounds in the fine chem. industry. The nanoscale geometry and electronic structure of supported Pd nanoparticles play a crucial role in providing the necessary catalytic properties. To improve catalytic activity and selectivity of Pd nanoparticles, it is possible to fine tune their intrinsic properties (e.g., size and oxidation state) by controlling the chem. transformations at different stages of catalyst preparation Recent years have seen considerable advancement in developing new catalyst preparation techniques as well as in understanding the mechanism of active site formation. This review summarizes some of the existing approaches to regulating the catalytic properties of C-supported Pd by variation of the C support, the composition of Pd precursor and its reduction conditions, as well as the addition of a 2nd active metal. The data presented may be useful for researchers developing efficient Pd/C catalysts for hydrogenation of polyfunctional organic compounds

Catalysis Today published new progress about Carbon nanofibers Role: CAT (Catalyst Use), NAN (Nanomaterial), PEP (Physical, Engineering or Chemical Process), PRP (Properties), TEM (Technical or Engineered Material Use), USES (Uses), PROC (Process). 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Quality Control of 97-99-4.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Deng, Qiang; Gao, Rui; Li, Xiang; Wang, Jun; Zeng, Zheling; Zou, Ji-Jun; Deng, Shuguang published the artcile< Hydrogenative Ring-Rearrangement of Biobased Furanic Aldehydes to Cyclopentanone Compounds over Pd/Pyrochlore by Introducing Oxygen Vacancies>, Application In Synthesis of 97-99-4, the main research area is hydrogenative ring rearrangement biobased furanic aldehyde cyclopentanone.

Upgrading furanic aldehydes (such as furfural or 5-hydroxymethyl furfural) to cyclopentanone compounds (such as cyclopentanone or 3-hydroxymethyl cyclopentanone) is of great significance for the synthesis of high-value chems. and biomass utilization. Developing an efficient reduced metal/acidic support with Lewis acidity is the key to facilitating the carbonyl hydrogenation and hydrolysis steps in the hydrogenative ring-rearrangement reaction. Herein, three pure Lewis acidic pyrochlore supports of the form A2B2O7 (La2Sn2O7, Y2Sn2O7, and Y2(Sn0.7Ce0.3)2O7-δ) with the same crystal structures and different metals are synthesized. The Lewis acidity and the surface properties of the pyrochlore can be tuned by inserting different kinds of A and B site metals. After impregnation, Pd nanoparticles with appropriate particle sizes are uniformly loaded on the surface of pyrochlore. For the reaction of the furanic aldehydes, all of these pyrochlore-based catalysts exhibit hydrogenation and hydrolysis rates that are both faster than those of traditional support-based catalysts due to the oxygen vacancy and pure Lewis acidity of the support. Among these pyrochlore-based catalysts, Pd/Y2Sn2O7 exhibits activity and selectivity that are higher than those of Pd/La2Sn2O7. Moreover, the Y2Sn2O7-based catalyst partially substituted by Ce3+ ions at the B site is more efficient, with the highest cyclopentanone yield and 3-hydroxymethyl cyclopentanone yield of 95.0% and 92.5%, resp. Furthermore, the catalyst can still maintain an effective activity and stability after 4 runs. This study not only presents an efficient biobased route for the production of cyclopentanone compounds but also focuses on the acid catalytic performance of pyrochlore based on its pure Lewis acidity.

ACS Catalysis published new progress about Crystal structure. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Application In Synthesis of 97-99-4.

Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem