Tag: M.W=100-150

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

Galkina, Olesia S.; Maas, Gerhard; Rodina, Liudmila L.; Nikolaev, Valerij A. published the artcile< Eco-Friendly Approach to Tetrasubstituted Diazodihydrofuranones: Valuable Precursors of Oxetane Derivatives and Other Heterocyclic Compounds>, COA of Formula: C8H14O2, the main research area is diazodihydrofuranone tetrasubstituted green preparation crystal structure.

Eco-friendly routes to 2,2,5,5-tetrasubstituted 4-diazodihydrofuran-3(2H)-ones were developed. In this manner, useful precursors to oxetane derivatives, potential NSAIDs, and other biol. active pharmaceuticals can be prepared without use of toxic reagents and solvents.

Synthesis published new progress about Crystal structure. 5455-94-7 belongs to class tetrahydrofurans, and the molecular formula is C8H14O2, COA of Formula: C8H14O2.

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

Smejkal, Tomas; Gopalsamuthiram, Vijayagopal; Ghorai, Sujit K.; Jawalekar, Anup M.; Pagar, Dinesh; Sawant, Krishna; Subramanian, Srinivas; Dallimore, Jonathan; Willetts, Nigel; Scutt, James N.; Whalley, Louisa; Hotson, Matthew; Hogan, Anne-Marie; Hodges, George published the artcile< Optimization of Manganese Coupling Reaction for Kilogram-Scale Preparation of Two Aryl-1,3-dione Building Blocks>, Recommanded Product: 2,2,5,5-Tetramethyldihydrofuran-3(2H)-one, the main research area is manganese catalysis coupling reaction aryl dione building block preparation.

Aryl-1,3-diones represent a promising new class of herbicidal acetyl-CoA carboxylase (ACCase) inhibitors. The original synthesis of this structural motif employed in the research phase involved a selenium oxide mediated oxidation, the use of diazoacetate and aryl lead reagents, and a low temperature oxidation of an aryl lithium intermediate, so it was not well suited to large scale synthesis. For kilogram scale synthesis of the two aryl-1,3-dione building blocks I [R = Me, Et], we developed an alternative route which employs a manganese or manganese-copper catalyzed alkyl Grignard coupling and a semi-pinacol rearrangement of an epoxide as the key steps. The optimized conditions could be of general interest as scalable methods for the synthesis of 2-alkyl substituted benzaldehydes and of 2-aryl-1,3-diones.

Organic Process Research & Development published new progress about Coupling reaction. 5455-94-7 belongs to class tetrahydrofurans, and the molecular formula is C8H14O2, Recommanded Product: 2,2,5,5-Tetramethyldihydrofuran-3(2H)-one.

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

Matsagar, Babasaheb M.; Hsu, Chang-Yen; Chen, Season S.; Ahamad, Tansir; Alshehri, Saad M.; Tsang, Daniel C. W.; Wu, Kevin C.-W. published the artcile< Selective hydrogenation of furfural to tetrahydrofurfuryl alcohol over a Rh-loaded carbon catalyst in aqueous solution under mild conditions>, SDS of cas: 97-99-4, the main research area is rhodium carbon catalyst furfural hydrogenation tetrahydrofurfuryl alc aqueous solution.

We describe the selective hydrogenation of furfural (FAL) into tetrahydrofurfuryl alc. (THFA) under mild conditions (30°C) in aqueous media using an Rh-loaded carbon (Rh/C) catalyst in a one-pot fashion. In FAL hydrogenation, the Rh/C catalyst showed a high THFA yield (92%) with 93% selectivity in aqueous media within 12 h, whereas the use of a dimethylacetamide (DMA) solvent system resulted in a 95% THFA yield within 32 h at 30°C. The study of the effect of the solvent on FAL hydrogenation reveals that polar solvents showed higher THFA yields than a toluene solvent. The Rh/C catalyst used in this study exhibited higher activity compared to Ru/C, Pd/C, Ni/C derived from Ni-based metal-organic framework (Ni-MOF), and Ni-loaded carbon black (Ni/CB) catalysts in FAL-to-THFA hydrogenation. The Rh/C catalyst is characterized in detail using various characterization techniques such as TEM, XRD, N2-adsorption-desorption, XPS, and ICP-OES to understand its physicochem. properties. The Rh/C catalyst shows similar high THFA yields in the recycling experiment of FAL hydrogenation under ambient conditions.

Sustainable Energy & Fuels published new progress about Adsorption. 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

Tong, Zhikun; Li, Xiang; Dong, Jingyu; Gao, Rui; Deng, Qiang; Wang, Jun; Zeng, Zheling; Zou, Ji-Jun; Deng, Shuguang published the artcile< Adsorption Configuration-Determined Selective Hydrogenative Ring Opening and Ring Rearrangement of Furfural over Metal Phosphate>, Quality Control of 97-99-4, the main research area is adsorption configuration hydrogenative ring opening rearrangement furfural metal phosphate.

Developing an economic catalyst to upgrade furfural to alcs. (such as linear alc. and cyclopentanol) is highly significant for fine chem. synthesis and biomass utilization. Here, a class of metal phosphate nanoparticles (such as CoP, Co2P, and Ni2P) with different metal compositions and topol. structures is synthesized. The acidity and hydrogen activation ability were well adjusted according to the types. An 80.2% yield of 1,2,5-pentanetriol was reported for the first time via a hydrogenative ring-opening route over CoP, whereas Ni2P shows a high catalytic efficiency for cyclopentanol with a 62.8% yield via a hydrogenative ring-rearrangement route. Based on the catalytic performance of Pd/C and the result of attenuated total reflectance-IR spectroscopy, the route difference is derived from the adsorption configuration of furfural on the catalyst. After loading on the insert support, the metal phosphate/support catalysts show high activity and stability during the recycling experiments This work provides an effective strategy to regulate the reaction path through an adsorption mechanism and shows the precise synergistic effect of hydrogenation and acid catalysis.

ACS Catalysis published new progress about Acidity. 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