Category: 97-99-4

Mironenko, Roman M.; Belskaya, Olga B.; Talsi, Valentin P.; Likholobov, Vladimir A. published the artcile< Mechanism of Pd/C-catalyzed hydrogenation of furfural under hydrothermal conditions>, Reference of 97-99-4, the main research area is palladium carbon nanotube catalyst hydrothermal condition furfural hydrogenation mechanism.

Catalytic hydrogenation of furfural under hydrothermal conditions is of great importance and has recently attracted huge attention as an approach to obtaining a wide range of valuable chems. from a renewable source. However, the data concerning the reaction mechanism of aqueous-phase furfural hydrogenation are very scarce, and it is still not clear which reactions lead to various carbonyl compounds, such as cyclopentanone, 4-oxopentanal, 5-hydroxy-2-pentanone. Herein, we present the results of an exptl. study of the mechanism of reactions occurring in the furfural hydrogenation under hydrothermal conditions over the 1% Pd/CNTs catalyst. The following approaches have been used to study the reaction mechanism: hydrogenation of key intermediates formed upon the furfural conversion, and isotopic labeling experiments using D2O as a tracer in hydrogenation of furfural, which provides direct evidence of the occurring reactions. It was found that the furfural hydrogenation process is realized through four pathways including various reductive and acid-catalyzed furan ring opening reactions. The methods and approaches used in the present work, as well as the results obtained, can be useful in studying the mechanism of aqueous-phase hydrogenation of a wide range of oxygen-containing substrates in the presence of catalysts of different compositions

Journal of Catalysis published new progress about Carbon nanotubes (catalyst support). 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Reference of 97-99-4.

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

Papadopoulos, Giorgos N.; Kokotou, Maroula G.; Spiliopoulou, Nikoleta; Nikitas, Nikolaos F.; Voutyritsa, Errika; Tzaras, Dimitrios I.; Kaplaneris, Nikolaos; Kokotos, Christoforos G. published the artcile< Phenylglyoxylic Acid: An Efficient Initiator for the Photochemical Hydrogen Atom Transfer C-H Functionalization of Heterocycles>, Reference of 97-99-4, the main research area is heterocycle green preparation phenylglyoxylic acid catalyst hydrogen atom transfer; C−H activation; hydrogen atom transfer; metal-free processes; phenylglyoxylic acid; photochemistry.

A cheap and efficient photochem. method was developed for the C-H functionalization of heterocycles was studied. Phenylglyoxylic acid (PhCOCOOH) would behave as an alternative to metal-based catalysts and organic dyes and provided a very general and wide array of photochem. C-H alkylation, alkenylation, and alkynylation, as well as C-N bond forming reaction methodologies. This novel, mild, and metal-free protocol was successfully employed in the functionalization of a wide range of C-H bonds, utilized not only O- or N-heterocycles, but also the less studied S-heterocycles.

ChemSusChem published new progress about C-H bond activation. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Reference of 97-99-4.

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

Tian, Hongli; Gao, Guoming; Xu, Qing; Gao, Zhiran; Zhang, Shu; Hu, Guangzhi; Xu, Leilei; Hu, Xun published the artcile< Facilitating selective conversion of furfural to cyclopentanone via reducing availability of metallic nickel sites>, SDS of cas: 97-99-4, the main research area is furfural cyclopentanone hydrogenation nickel catalyst.

Conversion of the biomass-derived furfural to cyclopentanone (CPO) involves multiple hydrogenation steps, in which not only the type but also the abundance of metallic sites might impact fates of the reaction intermediates and consequently selectivity of the products. In this study, we found that, during the hydrogenation, the carbonyl and the furan ring functionalities in furfural showed the different response to the number of nickel sites on Ni/SiO2 catalyst. The hydrogenation of the C = O in furfural could take place effectively with the nickel loading below 1 wt% to form firstly furfuryl alc. (FA) and then to CPO with the selectivity as high as 98.2%. In comparison, the higher nickel loading favored the hydrogenation of the furan ring in furfural or FA to form tetrahydrofurfuryl alc. (THFA), formation of which eliminated the chance for the formation of CPO. The hydrogenation of the carbonyl functionality and furan ring in furfural proceeded via distinct orientations of adsorption and the involvement of the varied number of metal sites. Controlling the number of exposed metallic nickel sites could thus tailor the selectivity of the products in hydrogenation of furfural.

Molecular Catalysis published new progress about Agglomeration. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, SDS of cas: 97-99-4.

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

Liu, Qianhe; Liu, Qing; Hu, Xun published the artcile< Selective conversion of furfural into value-added chemical commodity in successive fixed-bed reactors>, COA of Formula: C5H10O2, the main research area is furfural commodity successive fixed bed reactor.

Successive hydrogenation of furfural in two fixed-bed reactors connected in tandem with Cu/SiO2 and Ni/SiO2 as the catalysts was achieved under atm. pressure. Various targeting products including furfuryl alc. (yield: 98.8%), 2-methylfuran (yield: 95.1%), 2-methyltetrahydrofuran (yield: 96.2%) and tetrahydrofurfuryl alc. (yield: 78.2%) could be obtained by variation of the reactor configurations.

Catalysis Communications published new progress about Fixed-bed catalytic reactors. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, COA of Formula: C5H10O2.

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

Chen, Changzhou; Zhou, Minghao; Jiang, Jianchun published the artcile< Selective aqueous-phase hydrogenation of furfural to cyclopentanol over Ni-based catalyst under mild conditions>, Safety of (Tetrahydrofuran-2-yl)methanol, the main research area is hydrogenation furfural cyclopentanol nickel catalyst selective aqueous phase.

A series of carbon nanotube (CNT)-supported Ni-based catalysts were prepared through a simple impregnation method. The synthesized Ni-based bimetallic catalysts exhibited much smaller particle size and better dispersion than monometallic Ni/CNT catalyst. Owing to the synergistic effect of Ni with Mo, the material was especially active to hydrogenation of biomass derivatives in aqueous medium. Promotional effect was observed in NiMo/CNT catalyst during hydrogenation of furfural to fine chems., including cyclopentanone/cyclopentanol, which is of profound practical values for processing biomass degradation and may be applied in the food and biomass refining industry.

Journal of the Chinese Chemical Society (Weinheim, Germany) published new progress about Carbon nanotubes. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Safety of (Tetrahydrofuran-2-yl)methanol.

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

Lee, Jihyeon; Woo, Jinwoo; Nguyen-Huy, Chinh; Lee, Man Sig; Joo, Sang Hoon; An, Kwangjin published the artcile< Highly dispersed Pd catalysts supported on various carbons for furfural hydrogenation>, Reference of 97-99-4, the main research area is palladium nanoparticle carbon catalyst furfural hydrogenation cyclopentanone furfuryl alc.

Furfural (FAL), one of the important platform mols. derived from lignocellulosic biomass, can be converted into valuable chems. such as furfuryl alc. or cyclopentanone via hydrogenation. While carbon materials have been used as versatile catalyst supports for FAL hydrogenation, systematic studies on the structure of the catalytic performances are lacking. In this work, we prepare various types of carbon supports to investigate the impact of carbon structures for Pd-catalyzed FAL hydrogenation. Mesoporous carbons, including CMK-3, CMK-5, CMK-8, and MSU-F-C, as well as carbon nanotube and Vulcan XC are used as carbon supports. For the preparation of highly dispersed Pd-supported carbon (Pd/C) catalysts, chem. reduction by sodium borohydride is applied, in which trisodium citrate plays a critical role in anchoring small Pd clusters on the carbons. In the liquid-phase hydrogenation of FAL, CMK-5 with the largest surface area and hexagonal hollow tubular framework is proven to be the most efficient carbon support for Pd/C catalysts, with the highest conversion of FAL in both 2-propanol (100%) and water (86.4%) solvents. It is also demonstrated that the product selectivity in FAL hydrogenation over various Pd/C catalysts is changed dramatically depending on the type of solvent. The Pd/C catalysts exhibit similar fractions of product distributions containing furfuryl alc., cyclopentanol, tetrahydrofurfuryl alc., and minor products in 2-propanol. However, the production of cyclopentanone is increased when water is used as a solvent.

Catalysis Today published new progress about Carbon black Role: CAT (Catalyst Use), PRP (Properties), USES (Uses) (Vulcan XC, catalyst support). 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Reference of 97-99-4.

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

Pirmoradi, Maryam; Kastner, James R. published the artcile< A kinetic model of multi-step furfural hydrogenation over a Pd-TiO2 supported activated carbon catalyst>, Related Products of 97-99-4, the main research area is furfural hydrogenation palladium titanium activated carbon catalyst kinetic model.

The multi-step, aqueous phase hydrogenation kinetics of furfural (FUR) to furfuryl alc. (FA), 2-methylfuran (2MF), tetrahydrofurfuryl alc. (THFA) and 5-hydroxy-2-pentanone (5H2P) over Pd-TiO2 on an activated carbon catalyst (derived from a monolith structure) was studied (180°C, 2.1 MPa). Titanium addition created a metal-acid functional catalyst and promoted 5H2P synthesis from furfural. A Langmuir-Hinshelwood model with two active sites (a metal site for hydrogenation steps and an acid site for ring opening step) was applied to fit the kinetic data and parameters of the reaction system were obtained using non-linear regression of exptl. data. The kinetic model showed an acceptable agreement with the exptl. data with R2 of 0.93-0.96 and concentration residuals (exptl.-model) typically ≤ 5%. Adsorption constants of 2MF and THFA were significantly lower than the adsorption constants of the other three compounds A reaction rate constant of 1.6-1.8 mol/gcat.h for furfural consumption was predicted by the model. Reaction rates of 0.2-0.35 mol/gcat.h, 0.1-0.13 mol/gcat.h and 0.8-1.0 mol/gcat.h were predicted for formation of 2-methylfuran, tetrahydrofurfuryl alc. and 5-hydroxy-2-pentanone, resp. External and internal mass transfer criterion indicate intrinsic rate parameters were estimated and indicate the model can be used to perform monolithic reactor design for aqueous phase hydrogenation of furfural.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Hydrogenation. 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

Modelska, Magdalena; Binczarski, Michal J.; Kaminski, Zbigniew; Karski, Stanislaw; Kolesinska, Beata; Mierczynski, Pawel; Severino, Courtney J.; Stanishevsky, Andrei; Witonska, Izabela A. published the artcile< Bimetallic Pd-Au/SiO2 catalysts for reduction of furfural in water>, Application In Synthesis of 97-99-4, the main research area is palladium gold silicon dioxide furfural water bimetallic catalyst reduction.

Catalytic systems based on bimetallic Pd-Au particles deposited on SiO2 were prepared by ultrasonically assisted water impregnation and used in the hydrogenation of furfural obtained by the acidic hydrolysis of waste biomass (brewery’s spent grain) in aqueous phase. Pd-Au/SiO2 catalysts containing 50 g of Pd and 2-100 g of Au per 1 kg of catalyst were characterized by high activity in the studied process and, depending on the Pd/Au ratio, selectivity to 2-methyloxolan-2-ol. The modification of 5%Pd/SiO2 by Au leads to the formation of dispersed Au-Pd solid solution phases, which was confirmed by XRD, XPS, ToF-SIMS, SEM-EDS, and H2-TPR techniques. The effect of dilution of surface palladium by gold atoms is probably crucial for modification of the reaction mechanism and formation of 2-methyloxolan-2-ol as the main product.

Catalysts published new progress about Acid hydrolysis. 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

Yang, Youdi; Wang, Yanyan; Li, Shaopeng; Shen, Xiaojun; Chen, Bingfeng; Liu, Huizhen; Han, Buxing published the artcile< Selective hydrogenation of aromatic furfurals into aliphatic tetrahydrofurfural derivatives>, Name: (Tetrahydrofuran-2-yl)methanol, the main research area is furfural hydrogenation tetrahydrofurfural synthesis layered double hydroxide palladium catalyst.

Tetrahydrofurfural (THFF) and 5-hydroxymethyltetrahydro-2-furaldehyde (5-HMTHFF) are important chems. Synthesis of THFF and 5-HMTHFF from the selective hydrogenation of furfural (FF) and 5-hydroxymethylfurfural (HMF) is highly desirable. However, it is a great challenge to hydrogenate furanyl rings while keeping C=O intact. Herein, we found that Pd/LDH-MgAl-NO3 could efficiently catalyze the hydrogenation of FF to THFF and HMF to 5-HMTHFF in water. At near complete conversion of FF and HMF, the selectivities of THFF and 5-HMTHFF could reach 92.6% and 83.7%, resp. A series of control experiments showed that both the LDH-MgAl-NO3 support and water solvent played an important role in the unusual performance of the catalytic system. The hydrogenation of the furanyl ring occurred on the surface of Pd. Water prohibited the hydrogenation of the C=O group, and the special nature of LDH-MgAl-NO3 prevented hydrogenation of the C=O group on the support by the hydrogen spillover. Thus, the furanyl ring was selectively hydrogenated, and high selectivity of the desired product was successfully achieved. As far as we know, efficient hydrogenation of FF to THFF or HMF to 5-HMTHFF has not been reported. This work opens the way to selectively hydrogenate the furanyl ring while keeping C=O in the same mol. unchanged.

Green Chemistry published new progress about Green chemistry. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Name: (Tetrahydrofuran-2-yl)methanol.

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

Sanchez, Vladimir; Salagre, Pilar; Gonzalez, Maria Dolores; Llorca, Jordi; Cesteros, Yolanda published the artcile< Effect of the formation of NiCu alloy and use of biomass-derived furfural on the catalytic hydrogenation of furfural to THFA>, Product Details of C5H10O2, the main research area is tetrahydrofurfuryl alc furfural nickel copper alloy catalytic hydrogenation biomass.

Several Ni, Cu and Ni-Cu catalysts supported on mesoporous hectorite were prepared, characterized and tested for the hydrogenation of com. furfural to obtain tetrahydrofurfuryl alc. (THFA). The highest selectivity to THFA (95%) for a total conversion was achieved with the Ni-Cu catalyst prepared with a Ni:Cu molar ratio of 1:1 after 4 h of reaction. This can be explained by the formation of NiCu alloy in high amounts for this sample (88%), as detected by XRD. The lower selectivity to THFA obtained with other bimetallic catalysts prepared with Ni:Cu molar ratios of 6:1 and 1:6 were attributed to the lower percentage of NiCu alloy together with the lowest Ni richness of the NiCu alloy. Addnl., the best catalyst resulted in a yield to THFA of 90%, in the toluene phase, and 80% in the aqueous neutralized phase, when using a biomass extract of furfural obtained from almond shells instead of com. furfural. After several reuses of the catalyst employed in the toluene phase, some decrease of THFA was observed due to the increase of the crystallite size of the Cu phase, as observed by XRD, that should decorate the active NiCu alloy particles.

Molecular Catalysis published new progress about Biomass. 97-99-4 belongs to class tetrahydrofurans, and the molecular formula is C5H10O2, Product Details of C5H10O2.

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