Category: 539-88-8

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

Chen, Zhiyong published the artcileStudy on the formation of ethyl levulinate from wheat straw based on a model compound, COA of Formula: C7H12O3, the main research area is ethyl levulinate wheat straw glucose microcrystalline cellulose.

Glucose and microcrystalline cellulose were selected as model compounds to investigate the formation of Et levulinate (EL). Optimal glucose and microcrystalline cellulose transformation conditions resulted in yields of 41.05 weight% and 38.56 weight% for EL, 0.73 weight% and 2.63 weight% for ethyl-glucoside (EG), 0.42 weight% and 0.36 weight% for 5-hydroxymethylfurfural (HMF), and 2.18 weight% and 2.16 weight% for 5-ethoxy Me furfural (EMF), resp. Increasing the reaction time and temperature resulted in an optimized yield of EL. These increases also resulted in decreased EG and EMF yield, and the change trend of HMF was not significant. EMF, HMF, and EG are intermediates in the formation of EL. Finally, we concluded that biomass conversion occurs first through cellulose degradation to glucose followed by the production of EG through alcoholysis and hydrolysis and dehydration of the reaction products to produce EL.

Journal of Biobased Materials and Bioenergy published new progress about Liquefaction. 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

Prezelus, Flavie published the artcileA metrics-based approach to preparing sustainable membranes: application to ultrafiltration, Name: Ethyl 4-oxopentanoate, the main research area is cellulose diacetate membrane ultrafiltration solubility green chem.

The purpose of the research is to make a first step towards rationalizing green polymeric membrane preparation A holistic methodol. approach based on metrics that consider tech., environmental, health and safety issues have been suggested to assess sustainability of membrane preparation Metrics have been applied to solvent substitution in a non-solvent induced phase separation process. The flammability hazard of three shortlisted alternative solvents has substituted the reprotoxicity hazard of common solvents. The ultrafiltration cellulose diacetate membranes prepared with Me lactate as solvent have a greater renewable intensity and require a lower number of solvents for their preparation Trade-offs between use of resources (polymer, solvent, energy…) and membrane properties are inevitable. Further socio-economic, risk and life cycle anal. are crucial to fully integrate ecodesign in membrane preparation

Green Chemistry published new progress about Flammability. 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

Vazquez-Castillo, J. A. published the artcileHeat-integrated reactive distillation processes to produce ethyl levulinate: design and optimization including environmental, safety and economics aspects, SDS of cas: 539-88-8, the main research area is ethyl levulinate heat reactive distillation thermal coupling.

This study provides optimally designed reactive distillation (RD) processes for the production of Et levulinate, taking into account costs, environmental impact and safety. The thermally coupled RD process is the most appealing with major energy savings in the range of 9.6-54.3% lower than other RD processes, reduced environmental impact in the range of 5.7-51% lower ECO 99 index value and similar process safety less than 2% difference compared to other RD processes considered. The lower energy requirement ofthe thermally coupled process was reflected in the lowest energy use to produce Et levulinate (1.667 GJ/ton.).

Computer-Aided Chemical Engineering published new progress about Distillation. 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

Kolcsar, Vanessza Judit published the artcileSynthesis of a Pyrrolo[1,2-a]quinazoline-1,5-dione Derivative by Mechanochemical Double Cyclocondensation Cascade, Quality Control of 539-88-8, the main research area is methyl tetrahydropyrroloquinazoline dione preparation green chem; anthranilamide ethyl levulinate mechanochem double cyclocondensation cascade; Amberlyst® 15; Brønsted acid; anthranilamide; ball mill; cascade reaction; ethyl levulinate; mechanochemistry; quinazolinone.

N-heterocyclic compounds, such as quinazolinone derivatives, have significant biol. activities. Nowadays, as the demand for environmentally benign, sustainable processes increases, the application of compounds from renewable sources, easily separable heterogeneous catalysts and efficient, alternative activation methods is of great importance. In this study, a convenient, green procedure for the preparation of 3a-methyl-2,3,3a,4-tetrahydropyrrolo[1,2-a]quinazoline-1,5-dione through a double cyclocondensation cascade using anthranilamide and Et levulinate was developed. Screening of various heterogeneous Bronsted acid catalysts showed that Amberlyst 15 is a convenient choice. By applying mechanochem. activation in the preparation of this N-heterotricyclic compound for the first time, it was possible to shorten the necessary time to three hours compared to the 24 h needed under conventional conditions to obtain a high yield of the target product.

Molecules published new progress about Ball milling. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Quality Control of 539-88-8.

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

Wang, Yazhou published the artcileEffect of Phosphorus Precursor, Reduction Temperature, and Support on the Catalytic Properties of Nickel Phosphide Catalysts in Continuous-Flow Reductive Amination of Ethyl Levulinate, Formula: C7H12O3, the main research area is nickel phosphide ethyl levulinate reductive amination catalyst; N-alkyl-5-methyl-2-pyrrolidone; ethyl levulinate; flow reactor; molecular hydrogen; nickel phosphide; phosphorus precursor; reduction temperature; reductive amination; support effect.

Levulinic acid and its esters (e.g., Et levulinate, EL) are platform chems. derived from biomass feedstocks that can be converted to a variety of valuable compounds Reductive amination of levulinates with primary amines and H2 over heterogeneous catalysts is an attractive method for the synthesis of N-alkyl-5-methyl-2-pyrrolidones, which are an environmentally friendly alternative to the common solvent N-methyl-2-pyrrolidone (NMP). In the present work, the catalytic properties of the different nickel phosphide catalysts supported on SiO2 and Al2O3 were studied in a reductive amination of EL with n-hexylamine to N-hexyl-5-methyl-2-pyrrolidone (HMP) in a flow reactor. The influence of the phosphorus precursor, reduction temperature, reactant ratio, and addition of acidic diluters on the catalyst performance was investigated. The Ni2P/SiO2 catalyst prepared using (NH4)2HPO4 and reduced at 600°C provides the highest HMP yield, which reaches 98%. Although the presence of acid sites and a sufficient hydrogenating ability are important factors determining the pyrrolidone yield, the selectivity also depends on the specific features of EL adsorption on active catalytic sites.

International Journal of Molecular Sciences published new progress about Nanoparticles. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Formula: C7H12O3.

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

Barbaro, Pierluigi published the artcileSustainable Catalytic Synthesis for a Bio-Based Alternative to the Reach-Restricted N-Methyl-2-Pyrrolidone, Formula: C7H12O3, the main research area is aquivion support platinum heterogeneous catalyst preparation nanostructure; ethyl levulinate heptylamine platinum catalyst one pot reductive amination; methyl pyrrolidone preparation.

A variety of bifunctional catalysts are prepared combining immobilized metal nanoparticles and acid solid materials featuring Lewis or Bronsted acidity was reported. The catalytic systems are tested in the reductive amination of bio-derived levulinates with primary amines, using hydrogen as clean reducing agent, to obtain N-substituted-5-methyl-2-pyrrolidones, which were proposed as substitutes for the widely used, REACH-restricted solvent N-methyl-2-pyrrolidone. The overall process was studied in depth to identify the best combination of metal and acid functionalities to be used in one-pot and one stage. Pt immobilized onto the Bronsted solid acid Aquivion is shown to be the most efficient catalyst, with a productivity of N-heptyl-5-methyl-2-pyrrolidone of 7.9 mmolgcat-1 h-1 reached at full conversion and 98.6% selectivity, under 120°C, 4 bar H2 pressure and solvent-free conditions.

Advanced Sustainable Systems published new progress about Nanoparticles. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Formula: C7H12O3.

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