Category: esters-buliding-blocks

Anjali, Kaiprathu published the artcileNiobium based macromolecule preparation and its potential application in biomass derived levulinic acid esterification, Application In Synthesis of 539-88-8, the main research area is preparation niobium carboxyphenylporphyrin complex levulinate esterification; levulinate esterification niobium carboxyphenylporphyrin complex catalyst; niobium macromol biomass levulinate esterification.

Niobium incorporated meso-tetra-(4-carboxyphenyl)-porphyrin (Nb-TCPP) was prepared for the first time and grafted through the axial position by the surface amine groups present on functionalized SBA-15 (SBA-AM). The synthesized TCPP ligand, Nb-TCPP complex, and the grafted Nb-TCPP-SBA-AM complex were thoroughly characterized by various anal. and spectroscopic techniques such as FTIR, UV-visible, DR UV-visible, CHN, 1H NMR, powder XRD, and N2 sorption studies. The catalytic activity of the homogeneous (Nb-TCPP) and the heterogenized (Nb-TCPP-SBA-AM) complex were explored for the esterification of levulinic acid. The studies revealed that Nb-TCPP and Nb-TCPP-SBA-AM showed comparatively good catalytic activity (74-80% conversion) for the esterification of levulinic acid using methanol under mild reaction conditions with the formation of Me levulinate and α-angelica lactone as the major products.

Inorganic Chemistry Communications published new progress about Esterification. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Application In Synthesis of 539-88-8.

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

Yang, Fu published the artcileCatalytic Upgrading of Renewable Levulinic Acid to Levulinate Esters Using Perchloric Acid Decorated Nanoporous Silica Gels, COA of Formula: C7H12O3, the main research area is perchloric acid decorated silica gel catalyst levulinate ester synthesis.

Catalytic upgrading of renewable biomass resource toward useful chems. is interesting but challenged, in this paper, several inorganic acids were examined for the catalytic esterification of levulinic acid with alc., and then ulteriorly loaded on the applicable supports to obtain the heterogeneous catalysts. Among them, HClO4/SiO2 nanoporous solid-acid catalyst exhibits the highest catalytic activity for the synthesis of Et levulinate. The resulting HClO4/SiO2 catalyst was characterized by FT-IR, Energy Dispersive X-ray (EDX)-mapping, X-ray Diffraction (XRD), NH3-Temperature-Programmed-Desorption (TPD), and N2 desorption. Various reaction factors including loading of HClO4, catalyst dosage, reaction time and temperature were checked and optimized. As expected, the targeted catalyst affords 99% yield of Et levulinate and a durable activity even with five runs. Finally, esterification of levulinic acid with various alcs. over the HClO4/SiO2 was further expanded based on the optimal reaction condition.

ChemistrySelect published new progress about Esterification. 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

Sabarish, R. published the artcileSynthesis, characterization and evaluations of micro/mesoporous ZSM-5 zeolite using starch as bio template, Recommanded Product: Benzyl acetate, the main research area is zeolite esterification benzyl alc acetic acid starch template.

We report a simple and economical method to synthesis hierarchical ZSM-5 zeolite using a natural polymer, soluble starch, as a mesotemplate. The synthesized samples were characterized with X-ray diffraction, Fourier transform IR spectroscopy, field emission SEM, transmission electron microscopy, nitrogen sorption, ammonia temperature-programmed desorption and thermogravimetric anal. The crystallinity and Mordenite Framework Inverted structure of the samples was confirmed by X-ray diffraction and Fourier transform IR spectroscopy anal. SEM and transmission electron microscopy images revealed the presence of mesopores in the synthesized samples. The nitrogen adsorption/desorption results of the hierarchical samples have been found to be in agreement with the SEM and transmission electron microscopy results and support the development of mesoporosity. The acidity of the hierarchical zeolite was studied using ammonia temperature-programmed desorption. The thermogravimetric anal. confirmed the thermal stability of the synthesized samples up to 750°C. The catalytic activities of the modified and unmodified zeolites were specifically tested for the esterification of acetic acid with benzyl alc. The results indicate that the hierarchical ZSM-5 catalyst offers a better catalytic yield (76%) than the unmodified systems.

SN Applied Sciences published new progress about Esterification. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Recommanded Product: Benzyl acetate.

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

Guo, Tianmeng published the artcileSelective conversion of biomass-derived levulinic acid to ethyl levulinate catalyzed by metal organic framework (MOF)-supported polyoxometalates, Application of Ethyl 4-oxopentanoate, the main research area is biomass ethyl levulinate metal organic framework MOF supported polyoxometalate.

The esterification of levulinic acid (LA) and ethanol into Et levulinate is an attractive biomass conversion process since the product EL has wide applications as food additive, fragrance and fuel. Herein, a metal-organic framework (MOF)-supported phosphomolybdic acid [Cu-BTC][HPM] was synthesized with 1,3,5-Benzenetricarboxylic acid, copper nitrate and phosphomolybdic acid in a one-step process at ambient temperature The synthesized [Cu-BTC][HPM] was used for the catalytic esterification of levulinic acid to EL in ethanol, and showed excellent activity with a high EL yield close to 100% at 120 °C for 6 h, which should be ascribed to the uniform dispersion of HPM embedded in the MOF. The [Cu-BTC][HPM] catalyst could keep stable crystal structure and active component contents, and thus exhibited good stability in recycling process.

Applied Catalysis, A: General published new progress about Esterification. 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

Quereshi, Shireen published the artcileSynthesis and Characterization of Zirconia Supported Silicotungstic Acid for Ethyl Levulinate Production, Category: esters-buliding-blocks, the main research area is zirconia supported silicotungstate ethyl levulinate preparation.

A Keggin silicotungstic acid (HPS) catalyst was heterogenized by loading (10-40 weight %) over zirconia support, and the resulting catalysts were named ESZN-1 (10 weight %), ESZN-2 (20 weight %), ESZN-3 (30 weight %), and ESZN-4 (40 weight %). After that, synthesized catalysts were characterized using several tools and techniques which revealed that the Keggin structure of the parent HPS catalyst remained intact after heterogenization. Eventually, synthesized catalyst performance evaluation tests were performed for the production of Et levulinate from biomass-derived levulinic acid under microwave heating irradiations. Under optimum operating conditions, more than 90% LA conversion with 100% EL selectivity was obtained at a 110 °C temperature in 30 min in the presence of 100 mg of ESZN-4 in a solution containing levulinic acid and ethanol in a 1:43 ratio. A kinetic study on LA conversion in the presence of the ESZN-4 catalyst revealed a pseudo-first-order mechanism for Et levulinate synthesis.

Industrial & Engineering Chemistry Research published new progress about Esterification. 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

Pachamuthu, M. P. published the artcilePreparation of mesoporous stannosilicates SnTUD-1 and catalytic activity in levulinic acid esterification, Synthetic Route of 539-88-8, the main research area is mesoporous stannosilicate SnTUD1 catalytic levulinate esterification.

The direct synthesis of SnTUD-1 with different Si:Sn ratios (100, 50 and 25) by using non-surfactant template triethanolamine (TEA). It functioned as a structure-directing agent and assisted to graft the Sn ions into the TUD-1 silica layer. The physicochem. properties of these materials were examined with XRD, N2 sorption, DR UV-Vis, NH3-TPD, 29Si-NMR, HRTEM, XPS and pyridine adsorbed FT-IR studies, which indicated highly interconnected mesoporous structure with wormhole like morphol. Sn4+ ions were mainly tetrahedrically coordinated with silica; while increase of loading lead to the formation of nanocrystalline SnO2 with different sizes. Materials showed acidity in the range of 0.13-0.31 mmol/g. Synthesized catalysts were tested in the esterification of levulinic acid (LA) with various aliphatic alcs. and exhibited excellent activity. The catalyst was recycled five times without loss of its activity.

Microporous and Mesoporous Materials published new progress about Esterification. 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

Adi Putra, Zulfan published the artcileProcess design and techno-economic analysis of ethyl levulinate production from carbon dioxide and 1,4-butanediol as an alternative biofuel and fuel additive, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is ethyl levulinate butanediol carbon dioxide techno economic analysis.

Carbon dioxide capture, utilization, and storage (CCUS) is one of the promising neg. emission technologies. Within various CCUS routes available, CO2 conversion into fuels is one of the attractive options. Currently, most of CO2 conversion into fuels requires hydrogen, which is expensive and consume large energy to produce. Hence, a different route of producing fuel from CO2 by utilizing 1,4-butanediol as the raw material is proposed and evaluated in this study. This alternative route comprises production of levulinic acid from the reaction between CO2 and 1,4-butanediol and production of Et levulinate, an alternative biofuel and biofuel additive, via an esterification reaction of levulinic acid with ethanol. The process is designed and simulated according to the available data and evaluated in terms of its tech. features. Because of the unavailability of reaction data for synthesis of levulinic acid from 1,4-butanediol and CO2, several assumptions were taken, which may implicate the accuracy of the studied design. This tech. evaluation is followed by cost estimations and sensitivity anal. Because of the free CO2, the profitability of the plant depends strongly on the prices of the other chems. and the price difference between 1,4-butanediol and Et levulinate. Monte Carlo simulation indicates that the proposed plant will always be profitable if the Et levulinate is slightly more expensive than the 1,4-butanediol.

International Journal of Energy Research published new progress about Esterification. 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

Wu, Kai published the artcileInter-integration reactive distillation with vapor permeation for ethyl levulinate production: Modeling, process analysis and design, Related Products of esters-buliding-blocks, the main research area is reactive vapor permeation distillation ethyl levulinate production modeling design.

The reactive-vapor permeation-distillation (R-VP-D) hybrid configuration is a newly designed inter-integration concept firstly proposed for the production of Et levulinate (EL) by esterification of ethanol and levulinic acid in this paper. In the R-VP-D configuration, the VP membrane module is inserted to the reaction section of the reactive distillation (RD) column, of which the product water is in-situ removed by the vapor permeation (VP) to promote the performance of esterification RD process. The proposed R-VP-D configuration is modeled by Aspen Plus V8.4 using the two-dimensional VP model built in ACM, and the inserting position of single or double VP modules is found by contrast trials, where both the conversion rate and purity of product can reach the industrial production standards As a result, the proposed novel R-VP-D configuration is feasible, with > 21.6% and 31.4% reduction in total annual cost and total duty as compared to the configuration which only applies an extra distillation column to separation and recycle the excess ethanol without azeotrope separation, and with 13.5 and 21.5% reduction in TAC and total duty as compared to the hybrid configuration where the vapor permeation is coupled outside the RD column. The result also shows the advantage of the proposed R-VP-D process for potentially leading to the development of new integration processes and applications.

Chemical Engineering Science published new progress about Esterification. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Related Products of esters-buliding-blocks.

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

Zhang, Luxin published the artcileSulfonic acid-functionalized PCP(Cr) catalysts with Cr3+ and -SO3H sites for 5-ethoxymethylfurfural production from glucose, Name: Ethyl 4-oxopentanoate, the main research area is porous coordination polymer catalyst ethoxymethylfurfural glucose.

5-Ethoxymethylfurfural (EMF) has been identified as a potential biofuel and fuel additive, for which the production from glucose (the most abundant and inexpensive monosaccharide) in a one-step process would be highly desirable. Here, the synthesis of sulfonic acid-functionalized porous coordination polymers (PCPs) and their application as catalysts for EMF synthesis are reported. PCP(Cr)-BA (PCP material with Cr3+ ions and H2BDC-SO3H linkers) and PCP(Cr)-NA (PCP material with Cr3+ ions and H2NDC(SO3H)2 linkers) materials containing both Cr3+ sites and Bronsted-acidic -SO3H sites were prepared The morphol., pore structure, acidity, chem. composition, and thermal stability of the two functionalized PCP(Cr) catalysts were analyzed by systematic characterization. The catalysts featured a porous morphol. and dual Cr3+ and -SO3H sites, which enabled the cascade conversion of glucose to EMF. PCP(Cr)-BA exhibited higher performance than PCP(Cr)-NA with an EMF yield of 23.1% in the conversion of glucose at 140° after 22 h in an ethanol/water system. In addition, the as-prepared catalyst exhibited a high stability in the current catalytic system for EMF production from glucose with a constant catalytic activity in a four-run recycling test without an intermediate regeneration step.

RSC Advances published new progress about Etherification. 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

Yang, Fu published the artcileFully catalytic upgrading synthesis of 5-Ethoxymethylfurfural from biomass-derived 5-Hydroxymethylfurfural over recyclable layered-niobium-molybdate solid acid, COA of Formula: C7H12O3, the main research area is niobium molybdate catalyst preparation morphol hydroxymethylfurfural etherification.

Biomass-derived resources exploited in depth toward the synthesis of high value-added chems. is very promising, but still limited by the applicable catalyst. In this paper, we report regulated robust multilayer-like polyoxometalates(niobium molybdate) specific to the catalytic synthesis of promising 5-ethoxymethylfurfural (EMF). The present solid acid catalysts resulted from precisely-tuned compositions of Nb and Mo toward acquiring controlled bronsted acid amounts and interlayer space coupling with specific lewis acid sites are demonstrated to be the determining factors for tuning conversion and selectivity in the synthesis of EMF, resp. The characterization results indicate that the increment in Nb moiety is beneficial to produce more accessible acid sites and the enlarged interlayer space in the catalyst, thereby promoting the acid-catalyzed conversion. As a result, the full conversion(conv. 100%) of 5-hydroxymethylfurfural into the 5-ethoxymethylfurfural (select. >99%) by etherification with ethanol within only 60 min was realized as the record-high yield under the solvent-free condition, far outperforming several traditional catalysts. In addition, the rational 67% yield of EMF was received when using fructose as an initial reactant. Ulteriorly, the resultant catalyst inherits the superior catalytic activity in the substrate expansion experiments in the presence of different alcs. More importantly, the resulted catalyst shows durable catalytic activity without any activity-loss during the eight recycling, which reveals the huge potential industrial application prospect.

Applied Catalysis, B: Environmental published new progress about Etherification. 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