Esters-buliding-blocks

Hu, Lei published the artcileZirconium-Containing Organic-Inorganic Nanohybrid as a Highly Efficient Catalyst for the Selective Synthesis of Biomass-Derived 2,5-Dihydroxymethylfuran in Isopropanol, SDS of cas: 539-88-8, the main research area is zirconium organic inorganic nanohybrid catalyst biomass dihydroxymethylfuran isopropanol.

By the simple assembly of zirconium tetrachloride and diethylenetriaminepentaacetic acid (DTPA), a new acid-base bifunctional zirconium-containing organic-inorganic nanohybrid catalyst (Zr-DTPA) was successfully prepared in this work, and then used for the catalytic transfer hydrogenation (CTH) of biomass-derived 5-hydroxymethylfurfural (HMF) into 2,5-dihydroxymethylfuran (DHMF) using isopropanol as the in situ hydrogen donor and reaction solvent. Satisfactorily, 98.7% HMF conversion and 95.2% DHMF yield could be achieved in 4 h at a moderate reaction temperature of 140°C. After systematic studies, this excellent catalytic activity was proved to be mainly ascribed to the synergistic effect of Lewis-acidic sites (Zr4+) and Lewis-basic sites (O2- and N) with higher strengths and contents. Meanwhile, Zr-DTPA could be readily separated by filtration, when it was repeatedly used 5 recycles, its catalytic activity was not obviously changed, demonstrating that Zr-DTPA had good heterogeneity and reusability. More importantly, Zr-DTPA could also be employed to effectively catalyze the CTH of 5-methylfurfural, furfural, levulinic acid, Et levulinate and cyclohexanone into the corresponding products with high yields, indicating that it showed a superior universality for the selective hydrogenation of various biomass-derived carbonyl compounds

Waste and Biomass Valorization published new progress about Adsorption. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, SDS of cas: 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Wang, Ding-kai published the artcilePreparation of ethyl levulinate from wheat stalk over Zr(SO4)2/SiO2, HPLC of Formula: 539-88-8, the main research area is catalyst dosage wheat stalk ethyl levulinate; Ethyl levulinate; glucose; solid acid Zr(SO4)2/SiO2; wheat stalk.

A series of Zr(SO4)2/SiO2 solid acid catalysts with different Zr(SO4)2 loadings were prepared by water-soluble-impregnation method at room temperature Then, the prepared catalysts were characterized by Fourier transform IR spectroscopy, transmission electron microscopy and energy-dispersive X-ray spectrum, X-ray diffraction, adsorption/desorption of N2, and temperature programmed desorption of NH3. The results showed that the active component Zr(SO4)2 was successfully adhered to the mesoporous SiO2, and the acid amount of Zr(SO4)2/SiO2 increased with the increasing of the Zr(SO4)2 loadings. Finally, the wheat stalk was used as raw material and depolymerized over Zr(SO4)2/SiO2 to produce Et levulinate (EL). The reaction mixture was separated and purified by filtration and vacuum distillation The kinetic characteristics and the reaction pathway were also studied. A comparative study showed that 20 weight% Zr(SO4)2/SiO2 exhibited higher catalytic activity. When reaction temperature, time, catalyst dosage and Zr(SO4)2 loadings were 190°C, 50 min, 20 weight% and 30 weight%, the EL yield reached a maximum of 17.14%. The relative content of EL exceeded 90% after three steps of distillation

Turkish Journal of Chemistry published new progress about Adsorption. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, HPLC of Formula: 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Rodiansono published the artcileRecent progress in the direct synthesis of γ-valerolactone from biomass-derived sugars catalyzed by RANEY Ni-Sn alloy supported on aluminium hydroxide, Product Details of C7H12O3, the main research area is levulinic acid hydrogenation valerolactone aluminum hydroxide catalyst.

The direct synthesis of γ-valerolactone (GVL) from biomass-derived sugars (e.g., cellobiose, sucrose, glucose, and fructose) using RANEY nickel-tin alloy supported on aluminum hydroxide (RNi-Sn(x)/AlOH; x is the loading amount of Sn) catalysts has been investigated. A RNi-Sn(1.04)/AlOH (1.04 = loading amount of Sn (mmol)) catalyst exhibited the highest yield of GVL from cellobiose (37%), sucrose (67.3%), glucose (71.6%), and fructose (74.9%), whereas conventional RANEY Ni and RNi/AlOH catalysts produced only C-6 sugar alcs. (sorbitol & mannitol) at 443 K, H2 3.0 MPa for 12 h. The reduction of RNi-Sn(x)/AlOH with H2 at 673-873 K for 1.5 h resulted in the formation of Ni-Sn alloy phases (e.g., Ni3Sn and Ni3Sn2) and caused the transformation of aluminum hydroxide (AlOH) to amorphous alumina (AA). The RNi-Sn(2.14)/AA 873 K/H2 catalyst contained a Ni3Sn2 4 alloy as the major phase, which exhibited the best yield of GVL from sucrose (65.3%) under the same reaction conditions. The RNi-Sn(1.04)/AlOH catalyst was reusable and stable for at least five consecutive reaction runs.

Catalysis Science & Technology published new progress about Adsorption. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Product Details of C7H12O3.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Ji, Na published the artcileA novel Ni/AC catalyst prepared by MOCVD method for hydrogenation of ethyl levulinate to γ-valerolactone, Product Details of C7H12O3, the main research area is nickel catalyst prepared vapor deposition ethyl levulinate hydrogenation valerolactone.

GVL (γ-valerolactone) is identified as an important biomass platform mol. due to its wide application. In this work, a series of novel supported Ni catalysts with different supports and Ni loading were synthesized via metal-organic chem. vapor deposition (MOCVD) method for the hydrogenation of EL (Et levulinate) to GVL. Fourier transform IR spectroscopy, X-ray powder diffraction, nitrogen adsorption/desorption, inductively coupled plasma optical emission spectroscopy and transmission electron microscopy were used to characterize the as-synthesized catalysts. The results showed that the 2 weight% Ni/AC(MOCVD) presented superior catalytic activity when compared with the catalyst prepared by impregnation method. This behavior is explained in terms of the smaller Ni nanoparticles (4.28 nm) and higher dispersion on 2 weight% Ni/AC(MOCVD). Among the catalysts, the 2 weight% Ni/AC catalyst exhibited the best catalytic performance with 99.7% EL conversion and 79.8% GVL yield under 1 MPa initial H2 pressure (measured at room temperature) at 250°C for 2 h. In addition, the reaction conditions were optimized and the stability of the catalyst were also investigated. The insights gained from this study in the design of high dispersed Ni particles with smaller particle size via MOCVD method will facilitate the metal-catalyzed hydrogenation of EL to GVL.

Molecular Catalysis published new progress about Adsorption. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Product Details of C7H12O3.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Heda, Jidnyasa published the artcileHighly efficient micro-meso acidic H-USY catalyst for one step conversion of wheat straw to ethyl levulinate (biofuel additive), SDS of cas: 539-88-8, the main research area is ethyl levulinate wheat straw homogeneous catalyst physicochem property.

Et Levulinate (EL), biofuel additive can blend up to 20% with biodiesel to improve its fuel properties. Till the date, there are reports on homogeneous catalysts (H2SO4, ionic liquid) for synthesis of EL from raw biomass like wheat straw. To best of our knowledge, there is no single report on heterogeneous catalyst for one step synthesis of EL directly from wheat straw. This work is a successful attempt to use heterogeneous micro-meso acidic H-USY (post dealumination and desilication) for direct one step conversion of wheat straw to EL with higher EL yield 24.5 weight%, which is probably the highest so far.

Microporous and Mesoporous Materials published new progress about Adsorption. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, SDS of cas: 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhou, Shenghui published the artcileZirconium-lignosulfonate polyphenolic polymer for highly efficient hydrogen transfer of biomass-derived oxygenates under mild conditions, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is zirconium lignosulfonate polyphenolic polymer hydrogen transfer biomass oxygenate mild.

Both value-added utilization of low-rank renewable feedstocks to prepare catalytic materials and selective transformation of bioderived aldehydes are very attractive topics. Herein, lignosulfonate, a waste byproduct from the paper industry, was simply assembled with ZrCl4 under non-toxic hydrothermal conditions for scalable preparation of Zr-containing polyphenolic biopolymer catalysts (Zr-LS). Systematic characterizations indicated that the strong coordination between Zr4+ and phenolic hydroxyl groups in lignosulfonate led to the formation of strong Lewis acid-base couple sites (Zr4+-O2-) and porous inorganic-organic framework structure (mesopores centered at 6.1 nm), while the inherent sulfonic groups in lignosulfonate could serve as Bronsted acidic sites. The cooperative role of these versatile acid-base sites in Zr-LS afforded excellent catalytic performance for Meerwein-Ponndorf-Verley (MPV) reaction of a broad range of bioderived platform chems. under mild conditions (80 °C), especially of furfural (FF) to furfuryl alc. (FA), in quant. yields (96%) with high FA formation rate of 9600 μmol g-1 h-1 and TOF of 4.37 h-1. Kinetic studies revealed that the activation energy of the MPV reduction of FF was as low as 52.25 kJ/mol, accounting for the high reaction rate. Isotopic labeling experiments demonstrated direct hydrogen transfer from the α-C of 2-PrOH to the α-C of FF on acid-base sites was the rate-determining step. Moreover, Zr-LS showed good recyclability for at least seven reaction cycles.

Applied Catalysis, B: Environmental published new progress about Adsorption. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Recommanded Product: Ethyl 4-oxopentanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zainol, Muzakkir Mohammad published the artcileEthyl levulinate synthesis from biomass derivative chemicals using iron doped sulfonated carbon cryogel catalyst, Category: esters-buliding-blocks, the main research area is biomass iron sulfonated carbon cryogel catalyst ethyl levulinate.

Biomass-derived intermediate chems., such as furfuryl alc. (FA) and levulinic acid (LA) are feeds for ethanolysis reaction to produce Et levulinate (EL). EL is a promising chem. that can be used as a biofuel additive and precursor for chem. synthesis, such as γ-valerolactone. The present study conducted the ethanolysis of FA and LA using modified carbon cryogel as heterogeneous catalysts for improving the EL yield. The carbon cryogel (UCC) precursor was produced from urea and furfural, and modified via sulfonation. Iron (Fe) doping was then conducted to improve the surface chem. of the catalyst. The catalytic activity of sulfonated carbon cryogel (UCC-S) was evaluated for LA ethanolysis, and the UCC-S-Fe prepared from the incorporation of Fe on UCC-S was utilized to catalyze FA ethanolysis. The effects of reaction parameters (i.e., time, molar ratio of ethanol to feed, catalyst loading, and reaction temperature) were significant on the catalytic performance. High EL yield of 95.8 mol% and 95.4 mol% were obtained from the ethanolysis of LA and FA, resp. The performance of ethanolysis of carbohydrates and various biomass samples was evaluated to determine the EL yield using UCC-S-Fe. Both UCC-S and UCC-S-Fe were characterised using FTIR, XRD, TGA, NH3-TPD, BET, and SEM-EDX. The modification of UCC via sulfonation and Fe-doping improved the catalyst properties, and UCC-S-Fe demonstrated the potential to enhance biomass conversion to EL.

Journal of Cleaner Production published new progress about Adsorption. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Nath, Biswajit published the artcileHighly efficient renewable heterogeneous base catalyst derived from waste Sesamum indicum plant for synthesis of biodiesel, COA of Formula: C23H46O2, the main research area is Sesamum biodiesel synthesis heterogeneous catalyst.

Waste Sesamum indicum plant derived heterogeneous catalyst was utilized for the first time for biodiesel synthesis from sunflower oil. The derived catalyst was characterized by using Powder XRD, FT-IR, BET, TGA, XRF, AAS, XPS, SEM-EDX and TEM, and the characterization revealed the presence of Na, K, Ca, Mg, Fe, Mn, Zn, Si, Sr and Cl with high percentage of K (29.64 wt %) and Ca (33.80 wt %) as oxides and carbonates. The catalyst with a moderate surface area of 3.66 m2 g-1 exhibited excellent catalytic activity producing a yield of 98.9% biodiesel under the optimized conditions of 12:1 methanol to oil molar ratio and catalyst loading of 7 wt % at the reaction temperature of 65°C in a short reaction time of only 40 min. The catalyst could be reused up to the 3rd cycle of reaction with the yield of 94.2% biodiesel. The characterization of biodiesel was done by using FT-IR, NMR, and GC-MS techniques. The fuel property of produced biodiesel meets the prescribed limits of international standard The prepared catalyst is easy to handle, reusable, and found to be highly efficient green catalyst that could help in reduction of biodiesel cost. Thus, the catalyst can be recommended as a potential candidate for cost-effective biodiesel production at a large scale.

Renewable Energy published new progress about Adsorption. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, COA of Formula: C23H46O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Yoon, Seung Kyun published the artcileDevelopment of blood compatible composite using MPC copolymer and polyolefin for Non-PVC blood bag application, HPLC of Formula: 142-90-5, the main research area is blood bag compatible composite MPC copolymer polyolefin.

Polyolefin is a good candidate for a blood bag material alternative to the poly (vinyl chloride) (PVC) blood bag that contains di-2-ethylhexyl phthalate (DEHP). However, polyolefin readily adsorbs some plasma proteins and platelets. To prevent these undesired adsorption, 2-methacryloyloxyethyl phosphorylcholine (MPC) – hydroxyethyl methacrylate (HEMA) – lauryl methacrylate (LMA) copolymers with varying monomer ratios were synthesized and used as blended material for additives to reduce platelet adsorption. Platelet adsorptive properties were reduced by blending MPC copolymers with polyolefin and confirmed by the platelet adhesion test and the activated partial thromboplastin time (APTT) test.

Macromolecular Research published new progress about Adsorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, HPLC of Formula: 142-90-5.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Wang, Liwen published the artcileSiO2 supported Ni-In intermetallic compounds: Efficient for selective hydrogenation of fatty acid methyl esters to fatty alcohols, SDS of cas: 111-11-5, the main research area is SiO2 nickel indium hydrogenation fatty acid methyl ester alc.

Ni/SiO2 and SiO2 supported Ni2In, NiIn and Ni2In3 intermetallic compounds (IMCs) were prepared by the sol-gel method and tested for the selective hydrogenation of Me esters to fatty alcs. It was found that the Ni phyllosilicate formed during the sol-gel process leads to high Ni dispersion. In IMCs, the Ni atoms are homogeneously isolated by the In ones and the charge is transferred from In to Ni. In the selective hydrogenation, decarbonylation/decarboxylation dominatingly occur on Ni/SiO2, while SiO2 supported IMCs mainly give fatty alcs., and the yield of fatty alc. can reach above 94%. We suggest that it is the synergetic effect between Ni and In that facilitates the selective hydrogenation to yield fatty alcs. The catalyst stability was also investigated, and the catalyst deactivation is mainly ascribed to the carbonaceous deposit.

Applied Catalysis, B: Environmental published new progress about Adsorption. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, SDS of cas: 111-11-5.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics