Category: 539-88-8

He, Yunfei published the artcileSulfated complex metal oxides solid acids with dual Bronsted-Lewis acidic property for production of 5-ethoxymethylfurfural from biomass-derived carbohydrates, Computed Properties of 539-88-8, the main research area is sulfated metal oxide production ethoxymethylfurfural biomass derived carbohydrate.

The transformation of aldose-based carbohydrates into 5-ethoxymethylfurfural (EMF) is very challenging as compared to ketose-based carbohydrates, but the formers are more abundant and cheaper. Here, a series of sulfated complex metal oxides was synthesized for the conversion of aldose-based mono-, di-, and poly-saccharides, as well as starchy food waste into EMF. The catalysts were carefully characterized and the results showed that the type and strength of the acid sites were more important than their concentration It was also shown that the efficiency of these catalysts was significantly affected by the metal species in the catalyst composition and followed the order tetra- > tri- > bi- > mono-component metal oxides based catalyst. Among the prepared catalysts, Zr-Sn-Fe-Al-O-S exhibited superior catalytic activity, with an EMF yield of 33.1% from glucose, and yields ranging from 4.1-26.3% for di-, poly-saccharides and starchy food waste in ethanol/dimethyl sulfoxide solvent system under glucose/catalyst mass ratio of 4. The role of co-solvent in the reaction pathway was also studied. It was found that the predominant reaction pathway for EMF production was closely related to the co-solvent amount A kinetic model of glucose conversion to EMF was developed and the thermodn. anal. was performed, the main features of the exptl. observations can be described by the model. Zr-Sn-Fe-Al-O-S was reused for four runs without intermediate regeneration steps, showing a slight decay in activity. After reactivation by calcination before the fifth cycle, the catalyst recovered its activity, indicating good reusability and thermal stability.

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

Sun, Kai published the artcileConversion of monosaccharides into levulinic acid/esters: impacts of metal sulfate addition and the reaction medium, Synthetic Route of 539-88-8, the main research area is inorganic metal salt catalyst glucose fructose dehydration.

Inorganic salts could be used as catalysts for the effective conversion of sugars. In this study, the impacts of various metal sulfates (Na2SO4, K2SO4, MnSO4, CoSO4, NiSO4, ZnSO4, CuSO4, Fe2(SO4)3, La2(SO4)3 and Ce(SO4)2) on the conversion of glucose/fructose to levulinic acid in varied reaction media were evaluated. The sulfates themselves showed varied activity and selectivity for the conversion of the sugars to levulinic acid/esters or 5-hydroxymethylfurfural (HMF), depending on the coordination with the reaction medium. K2SO4 or Na2SO4 could catalyze the production of HMF from glucose/fructose in water, while in DMSO the yield of HMF was substantially higher. In THF, nevertheless, almost no HMF was formed, while other sulfates such as NiSO4 in THF could effectively catalyze the conversion of fructose to HMF. In alcs., Fe2(SO4)3 was the most effective sulfate for the conversion of the sugars to levulinic acid/esters, and the alcs. could effectively suppress the polymerization of the sugars. The distinct catalytic performances of the sulfates in the varied reaction media originated from their different coordination or chelation with the sugars and the reaction medium.

Journal of Chemical Technology and Biotechnology published new progress about Chelation. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Synthetic Route of 539-88-8.

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

Galanopoulos, Christos published the artcileAn integrated methodology for the economic and environmental assessment of a biorefinery supply chain, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is ethano ethyl levulinate electricity environmental assessment optimization simulation.

A supply chain network MILP model, developed by means of AIMMS software, and a process plant simulation model, developed by means of Aspen Plus, are combined for the optimization of a biorefinery network. Optimization of the supply chain network is initially addressed using literature process and economic data. The results are used as input in the Aspen Plus model where the tech. and economic performance of the biorefineries is calculated rigorously. The two computational tools are iteratively executed until convergence on number, locations and size of the biorefineries and on process yield to products and total costs is achieved. The final results are used to perform the Economic Value and Environmental Impact (EVEI) anal. of the overall biorefinery network. The methodol. is applied to a case study concerning the deployment of cereal straw in Germany to produce ethanol, Et levulinate and electricity. Optimization results reveal that the wheat straw supply network with four biorefineries is economically feasible and determines an environmental margin in terms of equivalent emissions savings of about 4 Mt of CO2 per yr.

Chemical Engineering Research and Design published new progress about Algorithm. 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

Yun, Wan-Chu published the artcileWater-born zirconium-based metal organic frameworks as green and effective catalysts for catalytic transfer hydrogenation of levulinic acid to γ-valerolactone: Critical roles of modulators, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is zirconium MOF levulinic acid valerolactone transfer hydrogenation catalyst; Levulinic acid; MOF-801; Modulators; Zr fumarate; γ-valerolactone.

While zirconium (Zr)-based metal organic frameworks (MOFs) are promising for conversion of levulinic acid (LA) to γ-valerolactone (GVL) through catalytic transform hydrogenation (CTH), these reported Zr MOFs for LA conversion must be synthesized in toxic DMF (DMF). From the viewpoint of sustainability, it is preferable to avoid usage of DMF-based solvents to prepare these Zr MOFs. As water is a green solvent, the aim of this study is to develop and investigate Zr MOFs, which are prepared in water, for LA conversion to GVL. Specifically, monocarboxylic acids (e.g., formic acid, acetic acid and propanoic acid) are employed as modulators during the preparation of water-born ZrF. The role of modulators is extremely important for the well-developed formation of water-born ZrF. In addition, different monocarboxylic acid modulators also significantly influence the morphol. of water-born ZrF; nevertheless, their crystalline structures and acidities are equivalent As for LA conversion, these water-born modulated ZrF MOFs are validated to successfully convert LA to GVL. Especially, the formic acid-modulated ZrF can exhibit LA conversion = 96%, selectivity for GVL = 98% and yield of GVL = 98%. These water-born modulated ZrF also exhibit even higher catalytic activities than the typical DMF-based ZrF and reported Zr-based MOFs in LA conversion to GVL. These water-born ZrF could be also reused even without regeneration for multiple cyclic LA conversion. These results and findings prove that the water-born ZrF is not only environmentally benign but also more effective for LA conversion to GVL.

Journal of Colloid and Interface Science published new progress about IR spectra. 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

Maneechakr, Panya published the artcileSelective conversion of fructose into 5-ethoxymethylfurfural over green catalyst, Product Details of C7H12O3, the main research area is fructose ethoxymethylfurfural green catalyst.

In this study, selective formation of 5-ethoxymethylfurfural (EMF) from one-pot conversion of fructose in a co-solvent of ethanol with THF over green SO3H-CD carbon was investigated for the first time using an ultrasonic system. The maximum EMF yield of 74% with 100% fructose conversion was achieved in mild conditions. Moreover, the better selectivity and the longer recyclability (eight cycles) for EMF production via particular reactions such as fructose dehydration and etherification were obviously found while the formation of 5-hydroxymethylfurfual, Et levulinate or humins was inhibited using SO3H-CD carbon, comparing to com. catalysts such as Amberlyst-35, SiO2-Tosic acid and Al2O3.

Research on Chemical Intermediates published new progress about Cosolvents. 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

Brouwer, Thomas published the artcileBiobased entrainer screening for extractive distillation of acetone and diisopropyl ether, Quality Control of 539-88-8, the main research area is biobased entrainer screening extractive distillation acetone diisopropyl ether volatility.

This work focuses on the assessment of biobased solvents for the industrial separation of acetone and diisopropyl ether employing extractive distillation From the exptl. screening of 35 (biobased) solvents at 1000 mbar, 84/16 mol ratio acetone/ diisopropyl ether, and a solvent to feed ratio of 1 (mass based) it was observed that DL-limonene entrained diisopropyl ether, resulting in an acetone relative volatility of 1.44. This is a consequence of the selective repulsion of the low-boiling and more polar acetone by DL-limonene. More extensive vapor-liquid equilibrium (VLE) anal. over the entire acetone-diisopropyl ether (pseudo-)binary composition range showed that DL-limonene was the only biobased solvent able to break the azeotrope. The exptl. investigated VLE data of this ternary system was successfully correlated with the NRTL and UNIQUAC models. The other solvents that appeared most interesting in the initial screening were water and ethylene carbonate, entraining acetone with the highest observed diispropyl ether relative volatilities of 2.71 and 11.6. Although the high induced relative volatility for the 84/16 mol ratio acetone/ diisopropyl ether appeared interesting, over the entire composition range this resulted however in a shift in location of the azeotrope rather than removing the azeotrope. Therefore, it was concluded that DL-limonene is for this system the best performing biobased entrainer of the screening study. The observations are in agreement with observations from literature on similar systems, where oxygenated polar solvents were seen to have more affinity towards the ketone than towards the ether, while apolar solvents induce a higher volatility of the ketones.

Separation and Purification Technology published new progress about Azeotropes. 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

Subbotina, Elena published the artcileZeolite-Assisted Lignin-First Fractionation of Lignocellulose: Overcoming Lignin Recondensation through Shape-Selective Catalysis, Computed Properties of 539-88-8, the main research area is zeolite catalyst lignin fractionation lignocellulose wood hemicellulose; biomass; depolymerization; heterogeneous catalysis; lignin; zeolites.

Organosolv pulping releases reactive monomers from both lignin and hemicellulose by the cleavage of weak C-O bonds. These monomers recombine to form undesired polymers through the formation of recalcitrant C-C bonds. Different strategies were developed to prevent this process by stabilizing the reactive monomers (i.e., lignin-first approaches). To date, all reported approaches rely on the addition of capping agents or metal-catalyzed stabilization reactions, which usually require high pressures of hydrogen gas. Herein, a metal- and additive-free approach is reported that uses zeolites as acid catalysts to convert the reactive monomers into more stable derivatives under organosolv pulping conditions. Experiments with model lignin compounds showed that the recondensation of aldehydes and allylic alcs. produced by the cleavage of β-O-4′ bonds was efficiently inhibited by the use of protonic β zeolite. By applying a zeolite with a preferred pore size, the bimol. reactions of reactive monomers were effectively inhibited, resulting in stable and valuable monophenolics. The developed methodol. was further extended to birch wood to yield monophenolic compounds and value-added products from carbohydrates.

ChemSusChem published new progress about Birch wood. 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

Gao, Xiaoqing published the artcileRu/CeO2 catalyst with optimized CeO2 morphology and surface facet for efficient hydrogenation of ethyl levulinate to γ-valerolactone, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is ruthenium ceria catalyst surface facet ethyl levulinate hydrogenation valerolactone.

Three Ru/CeO2 catalysts with different CeO2 morphol. (nanorod, nanocube and nano-octahedra) mainly exposed (1 1 0) + (1 0 0), (1 0 0) and (1 1 1) facets for hydrogenation of biomass-derived Et levulinate (EL) to valuable γ-valerolactone (GVL). Ru/CeO2-rod with exposed (1 1 0) crystal plane obtained the highest GVL yield (99.4%) and best productivity (13140 h-1). The surface facets of CeO2 supports not only affect the chem. states of Ru species but also tune the concentration of oxygen vacancy in Ru-CeO2 interface. The concentration of oxygen vacancy shows a linear relationship with GVL production rate. DFT calculations indicate that the lactonization of CH3CHOCH2CH2CO* to produce GVL is the rate-determining step in EL hydrogenation, and Ru10/CeO2 (1 1 0) with more oxygen vacancy has low activation energy barrier, compared to Ru10/CeO2 (1 0 0) and Ru10/CeO2 (1 1 1).

Journal of 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, Recommanded Product: Ethyl 4-oxopentanoate.

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

Tian, Hongli published the artcileSulfated attapulgite for catalyzing the conversion of furfuryl alcohol to ethyl levulinate: Impacts of sulfonation on structural transformation and evolution of acidic sites on the catalyst, Product Details of C7H12O3, the main research area is ethyl levulinate furfuryl alc sulfated attapulgite sulfonation catalyst.

Attapulgite (ATTP) is an abundant natural magnesium aluminosilicate mineral that can be used as support for manufacturing cost-effective solid acid catalysts. This study mainly focuses on structural change of ATTP and the formation of Bronsted and Lewis acid sites during sulfonation in H2SO4. The results indicate that the sulfonation leads to the drastic change of the crystal phases as sulfuric acid not only plays the roles of grafting the sulfur species but also reacts with the CaO, MgO, Al2O3 and Fe2O3 or their salts in ATTP to form the sulfates, resulting in the substantial change of the porous structure of ATTP. In such a process, the Bronsted acidic sites, which are the main active sites for the conversion of furfuryl alc. (FA) to Et levulinate (EL), are introduced, while the abundance/strength of the Lewis acid sites are enhanced. The yield of EL up to 95.4% is achieved over the H2SO4/ATTP catalyst. The Fe2(SO4)3 and MgSO4 in the catalyst leaches in ethanol but does not affect the catalytic stability. The formed polymer also does not affect much the catalytic activity after their removal via the calcination in air.

Renewable Energy 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