Category: esters-buliding-blocks

Guo, Qianqian published the artcileLow-cost synthesis of nanoaggregate SAPO-34 and its application in the catalytic alcoholysis of furfuryl alcohol, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is SAPO nanoaggregate furfuryl alc catalytic alcoholysis.

Silicoaluminophosphate-34 (SAPO-34) mol. sieves have important applications in the petrochem. industry as a result of their shape selectivity and suitable acidity. In this work, nanoaggregate SAPO-34 with a large external surface area was obtained by dissolving pseudoboehmite and tetraethylorthosilicate in an aqueous solution of tetraethylammonium hydroxide and subsequently adding phosphoric acid. After hydrolysis in an alk. solution, the aluminum and silicon precursors exist as Al(OH)4- and SiO2(OH)-, resp.; this is beneficial for rapid nucleation and the formation of nanoaggregates in the following crystallization process. Addnl., to study the effect of the external surface area and pore size on the catalytic performance of different SAPO-34 structures, the alcoholysis of furfuryl alc. to Et levulinate (EL) was chosen as a model reaction. In a comparison with the traditional cube-like SAPO-34, nanoaggregate SAPO-34 generated a higher yield of 74.1% of EL, whereas that with cube-like SAPO-34 was only 19.9%. Moreover, the stability was remarkably enhanced for nanoaggregate SAPO-34. The greater external surface area and larger number of external surface acid sites are helpful in improving the catalytic performance and avoiding coke deposition.

Chinese Journal of Catalysis published new progress about Alcoholysis. 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

Vaishnavi, B. J. published the artcileUtilization of renewable resources: Investigation on role of active sites in zeolite catalyst for transformation of furfuryl alcohol into alkyl levulinate, SDS of cas: 539-88-8, the main research area is renewable resources zeolite catalyst transformation furfuryl alc alkyl levulinate.

A bio-derived furfuryl alc. transformation into various high-value chems. is a growing field of interest among researchers. This study reports an exclusive investigation of the porosity and active sites responsible for the efficient alcoholysis of furfuryl alc. to alkyl levulinate by the aid of zeolite catalyst. Alkyl levulinate is a promising platform chem. potentially used as a fuel additive and also for the production of chems. A detailed study using well-characterized HZSM-5 catalyst on the influence of acidity and post synthesis modification like desilication, dealumination, metal ion exchange and phosphate modification revealed the most desired type of acid sites required to catalyze this reaction. Among the HZSM-5 catalysts tested, HZSM-5 (SAR 95) showed the best performance of ≥ 99% furfuryl alc. conversion and 85% Bu levulinate selectivity under optimum conditions. The catalyst exhibited good recyclability addnl. addressing all the challenges reported in the previous literature fulfilling the green chem. principles.

Molecular Catalysis published new progress about Alcoholysis. 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, Yantao published the artcileMicrowave-assisted catalytic upgrading of bio-based furfuryl alcohol to alkyl levulinate over commercial non-metal activated carbon, HPLC of Formula: 539-88-8, the main research area is activated carbon alcoholysis catalyst furfuryl alc alkyl levulinate microwave.

A cheap and com. available non-metal activated carbon (AC) as an efficient catalyst for the alcoholysis of furfuryl alc. (FA) to alkyl levulinate (AL) under microwave assistance was firstly investigated. The catalyst gave an impressive Me levulinate (ML) yield of 78% in only 5 min at 170 °C in the presence of FA (0.2 M, 3 mL) and AC (100 mg). Various reaction parameters in dependence of time such as temperature, catalyst and feedstock loadings as well as solvent types have been optimized. The re-utilization experiments of the catalyst showed that the activity related to the acidic groups of the catalysts, and the deactivation was due to the leaching of acidic specie, which was easily extracted by the solvent. Note that extremely low concentration of the active species extracted from AC (less than 1 wt %) could also give 62% ML yield. The present study provided a promising way for AL synthesis over cheap, com. available and environmentally benign catalyst.

Molecular Catalysis published new progress about Alcoholysis. 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

Manjunathan, Pandian published the artcileRecognizing soft templates as stimulators in multivariate modulation of tin phosphate and its application in catalysis for alkyl levulinate synthesis, COA of Formula: C7H12O3, the main research area is tin phosphate catalysis alkyl levulinate.

Catalyst synthesis is an art where an inefficient material can be remarkably converted into a highly active and selective catalyst by adopting a suitable synthetic strategy to tune its properties during synthesis. The underlying principle of the strategy presented here is the integration of tailoring the structural and chem. behavior of tin phosphates with tuned catalytic active centers directed by employing different structure directing agents (SDAs) and the attempt to understand this in detail. It is demonstrated how soft templates can be effectively used for their so far unknown utilization of tuning the active sites in phosphate containing catalysts. We found that, by using an appropriate synthesis strategy, it is possible to tune and control explicitly both the catalyst morphol. and the nature of active sites at the same time. The 31P MAS NMR study revealed that employing SDAs in the synthesis strongly influenced the nature and amount of phosphate species in addition to porosity. The resultant different nanostructured SnPO catalysts were investigated for one-pot synthesis of alkyl levulinates via alcoholysis of furfuryl alc. Among the catalysts, SnPO-P123 exhibited greater Bu levulinate yield via alcoholysis of furfuryl alc. with n-butanol and the study was extended to synthesize different alkyl levulinates. Importantly, the active sites in the SnPO-P123 catalyst responsible for the reaction were elucidated by a study using 2,6-lutidine as a basic probe mol. This study therefore provides an avenue for rational design and construction of highly efficient and robust nanostructured SnPO catalysts to produce alkyl levulinates selectively.

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

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

Rashed, Nurnobi Md. published the artcileDirect Phenolysis Reactions of Unactivated Amides into Phenolic Esters Promoted by a Heterogeneous CeO2 Catalyst, Synthetic Route of 140-11-4, the main research area is phenolic ester preparation solvent free; amide aliphatic aromatic alc direct phenolysis CeO2 catalyst; acid-base cooperation; heterogeneous catalysts; phenolic esters; phenolysis; unactivated amides.

The direct catalytic esterification of amides that leads to the construction of C-O bonds through the cleavage of amide C-N bonds is a highly attractive strategy in organic synthesis. While aliphatic and aromatic alcs. can be readily used for the alcoholysis of activated and unactivated amides, the introduction of phenols is more challenging due to their lower nucleophilicity in the phenolysis of unactivated amides. Herein, phenols can be used for the phenolysis of unactivated amides into the corresponding phenolic esters using a simple heterogenous catalytic system based on CeO2 under additive-free reaction conditions was demonstrated. The method tolerates a broad variety of functional groups (>50 examples) in the substrates. Results of kinetic studies afforded mechanistic insights into the principles governing this reaction, suggesting that the cooperative effects of the acid-base functions of catalysts would be of paramount importance for the efficient progression of the C-N bond breaking process, and consequently, CeO2 showed the best catalytic performance among the catalysts explored.

Chemistry – A European Journal published new progress about Alcoholysis. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Synthetic Route of 140-11-4.

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

Frigo, Stefano published the artcileUtilisation of advanced biofuel in CI internal combustion engine, Name: Ethyl 4-oxopentanoate, the main research area is advanced biofuel internal combustion engine compression ignition utilization.

In recent years, biofuels have been attracting more attention, especially in Europe, due to the new regulations concerning the improvement of renewables in fuel composition The acid-catalyzed alcoholysis reaction of the cellulosic fraction of raw and pre-treated lignocellulosic biomasses, using n-Butanol (n-BuOH) and diluted inorganic acid as homogeneous catalyst, produces a mixture mainly composed by Bu Levulinate (BL) from cellulose, Di-Bu ether (DBE) from n-BuOH etherification and unreacted n-BuOH. This last can be then separated and recycled, so increasing the sustainability of the whole process. BL is directly obtained from cellulosic fraction of not edible biomass and represents a promising advanced biofuel. Therefore, in the different types of blends containing the main products obtainable from the one-pot alcoholysis of lignocellulosic biomasses, BL represents the effective renewable component of the fuel. In this work, different blends of BL/DBE mixed with Diesel fuel were tested in a small single-cylinder air-cooled Diesel engine with direct injection. Data concerning the measurement of pollutant emission, engine performance and combustion characteristics are reported. The mixtures were prepared by using com. reactants, characterized by compositions analogous to those of the reaction mixtures The obtained results evidenced the potentiality of these novel blending mixtures to reduce the emissions of particulate without any increasing of NOx emission or changing in engine power and efficiency.

Fuel published new progress about Alcoholysis. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Name: Ethyl 4-oxopentanoate.

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

Ma, Yan published the artcileDirectional liquefaction of lignocellulosic biomass for value added monosaccharides and aromatic compounds, Computed Properties of 539-88-8, the main research area is lignocellulosic biomass liquefaction monosaccharide aromatic compound.

Using lignocellulosic biomass as a feedstock for sustainable production of platform mols. is of great significance. We examined the directional liquefaction coupled with efficient stepwise fractionation of bamboo biomass into two groups of chems.: monosaccharides and aromatic products. When sulfuric acid was used as the catalyst, a conversion of 70% was achieved with a 40% yield of monosaccharides and a 20% yield of aromatics were obtained at 180°C for 30 min when the catalyst loading was 3.0% per 6.0 g bamboo. The production of 5-hydroxymethylfurfural (HMF), 5-ethoxymethylfurfural (EMF), Et levulinate (EL) and furfural was analyzed in terms of byproducts formation. Due to similar physiochem. properties in each fraction, the platform mols. could broaden a new paradigm of bamboo biomass utilization for renewable energy and value-added biochems.

Industrial Crops and Products published new progress about Alcoholysis. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Computed Properties of 539-88-8.

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

Quereshi, Shireen published the artcileInsights into Microwave-Assisted Synthesis of 5-Ethoxymethylfurfural and Ethyl Levulinate Using Tungsten Disulfide as a Catalyst, Application of Ethyl 4-oxopentanoate, the main research area is ethoxymethylfurfural ethyl levulinate tungsten disulfide catalyst.

Microwave-assisted synthesis of 5-ethoxymethylfurfural (EMF) and Et levulinate (EL) in the presence of tungsten disulfide has been studied for the first time. The catalyst was synthesized at 600°C in a tubular furnace using elemental tungsten and sulfur to obtain multilayered flakes/sheets of WS2. The textural and morphol. properties of the synthesized WS2 catalyst were characterized using XRD, Raman, SEM, SEM-EDX, TEM, TEM-EDX, HR-TEM, SAED, and surface area analyzer, which showed the formation of multiple two-dimensional layers of sheet/flake-type structure. Activity test of the catalyst in a microwave-assisted reaction resulted in 100% fructose conversion and 62% EMF yield for the experiment performed at 160°C temperature in 15 min. A qual. anal. of the product samples using GC-MS spectrometry showed the presence of several intermediates and byproducts based on which a mechanistic insight into the production of EMF from fructose has been proposed. Application of tungsten disulfide has been explored for the sustainable production of 5-ethoxymethylfurfural and Et levulinate from biorenewable resources.

ACS Sustainable Chemistry & Engineering published new progress about Alcoholysis. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Application of Ethyl 4-oxopentanoate.

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

Wang, Shijie published the artcileExperimental and theoretical studies on glucose conversion in ethanol solution to 5-ethoxymethylfurfural and ethyl levulinate catalyzed by a Bronsted acid, Product Details of C7H12O3, the main research area is Bronsted acid catalyzed glucose ethoxymethylfurfural ethyl levulinate.

The fundamental understanding of glucose conversion to 5-ethoxymethylfurfural (EMF) and Et levulinate (EL) (value-added chems. from biomass) in ethanol solution catalyzed by a Bronsted acid is limited at present. Consequently, here, the reaction pathways and mechanism of glucose conversion to EMF and EL catalyzed by a Bronsted acid were studied, using an exptl. method and quantum chem. calculations at the B3LYP/6-31G(D) and B2PLYPD3/Def2TZVP level under a polarized continuum model (PCM-SMD). By further verification through GC/MS tests, the mechanism and reaction pathways of glucose conversion in ethanol solution catalyzed by a Bronsted acid were revealed, showing that glucose is catalyzed by proton and ethanol, and ethanol plays a bridging role in the process of proton transfer. There are three main reaction pathways: through glucose and Et glucoside (G/EG), through fructose, 5-hydroxymethylfurfural (HMF), levulinic acid (LA), and EL (G/F/H/L/EL), and through fructose, HMF, EMF, and EL (G/F/H/E/EL). The G/F/H/E/EL pathway with an energy barrier of 20.8 kcal mol-1 is considered as the thermodn. and kinetics primary way, in which the reaction rate of this is highly related to the proton transfer in the isomerization of glucose to fructose. The intermediate HMF was formed from O5 via a ring-opening reaction and by the dehydration of fructose, and was further converted to the main product of EMF by etherification or by LA through hydrolysis. EMF and LA are both unstable, and can partially be transformed to EL. This study is beneficial for the insights aiding the understanding of the process and products controlling biomass conversion in ethanol solution

Physical Chemistry Chemical Physics published new progress about Alcoholysis. 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

Laskar, Ikbal Bahar published the artcileTaming waste: Waste Mangifera indica peel as a sustainable catalyst for biodiesel production at room temperature, HPLC of Formula: 929-77-1, the main research area is waste Mangifera catalyst biodiesel production.

In the present study, the efficacy of waste peels of mango (Mangifera indica) as a basic catalyst in room temperature transesterification reaction is investigated for biodiesel production from soybean oil. Biowaste based catalyst, Mangifera indica peel ash, was prepared by conventional open air burning of the mango peel. The morphol. and chem. components of the catalyst are investigated using several techniques such as X-ray diffraction (XRD), Fourier Transform IR Spectroscopy (FT-IR), SEM (SEM), Transmission Electron Microscopy (TEM), Thermogravimetric anal. (TGA), X-ray fluorescence (XRF), XPS, Energy-dispersive X-ray spectroscopy (EDS), Brunauer-Emmett-Teller (BET) and Hammett indicator method. The highest biodiesel yield of 98% was attained under the optimized reaction conditions; methanol to oil ration of 6:1, catalyst loading of 6 wt%, and time of 4 h under room temperature Crucially, the catalyst retained its activity up to 4th cycle of reused. The excellent catalytic activity of the ash catalyst could be attributed to the presence of highly basic metal oxides such as K2O, MgO and CaO, its high surface area and porous nature.

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

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