Tag: M.W=100-150

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

Kumari, P. Krishna published the artcileTungstophosphoric acid supported on mesoporouus niobiumoxophosphate: an efficient solid acid catalyst for etherification of 5-hydroxymethylfurfural to 5-ethoxymethylfurfural, Synthetic Route of 539-88-8, the main research area is tungstophosphoric acid supported mesoporouus niobiumoxophosphate solid acid catalyst etherification; hydroxymethylfurfural ethoxymethylfurfural catalyst niobiumoxophosphate etherification.

Tungstophosphoric (TPA) supported on mesoporouus niobiumoxophosphate (NbP) catalysts were prepared with different loadings. The synthesized materials employed as heterogeneous solid acid catalysts for selective etherification of 5-hydroxymethylfurfural to 5-ethoxymethylfurfural. Physico-chem. properties of the catalysts were obtained by different spectroscopic techniques and their results exposed that TPA was a highly dispersed state on NbP and acidity of the catalyst enhanced due to its dispersion. The higher catalytic performance can be allied to the total acidity of the catalysts with appropriate number of Bronsted-Lewis acid sites which were directed by the contact and dispersion of TPA on support. Different reaction parameters were premeditated and 25 wt% TPA/NbP catalyst exhibited highest catalytic activity with 95% of HMF conversion and 89% of EMF yield. The catalyst is reusable without noticeable turn down in catalytic performance up to five cycles. A kinetic model for etherification of HMF was also derived.

Catalysis Today 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, Synthetic Route of 539-88-8.

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

Aakko-Saksa, Paivi T. published the artcileRenewable Methanol with Ignition Improver Additive for Diesel Engines, Application of Ethyl 4-oxopentanoate, the main research area is methanol fuel ignition improver additive diesel engine.

Reduced emissions and environmental burden from shipping are an important aim of tightening emission regulations and ambitious climate change strategy. Renewable methanol produced from biomass or from other renewable sources represents one option to face these challenges. We studied the potential of renewable methanol to offer such benefits in diesel operation in a Scania ethanol engine, which is designed for additized ethanol fuel (ED95) containing ignition improver and lubricity additives. Methanol (MD95) with several types of ignition improver and lubricity additives was studied for use in diesel engines. MD95 fuels were clean-burning, emitting even less gaseous emissions than ED95, particularly when glycerol ethoxylate was used as an ignition improver. Particle mass and number emissions originating from additives in the exptl. fuels could be reduced with an oxidation catalyst. Reduced additive dosing in the MD95 fuels was studied with the aid of fuel injection into the intake manifold. Overall, the results showed that the monofuel MD95 concept is a promising solution for smaller vessels equipped with 800-1200 kW engines.

Energy & Fuels published new progress about Diesel engines. 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

Mohd. Hussin, Fathin Najihah Nor published the artcileTaguchi design-assisted immobilization of Candida rugosa lipase onto a ternary alginate/nanocellulose/montmorillonite composite: Physicochemical characterization, thermal stability and reusability studies, COA of Formula: C7H12O3, the main research area is Candida rugosa lipase immobilization nanocellulose; Alginate; Candida rugosa lipase; Enzyme immobilization; Montmorillonite; Nanocellulose; Taguchi optimization.

Biomass from oil palm frond leaves (OPFL) is an excellent reservoir of lignocellulosic material which full potential remains untapped. This study aimed to statistically optimize the covalent immobilization of Candida rugosa lipase (CRL) onto a ternary support comprised of OPFL derived nanocellulose (NC) and montmorillonite (MMT) in alginate (ALG) (CRL-ALG/NC/MMT). The coarser topol. and the presence of characteristic spherical globules in the field emission scanning electron micrographs and at. force micrographs, resp., supported the existence of CRL on ALG/NC/MMT. In addition, amide peaks at 3478 and 1640 cm-1 in the fourier transform IR spectra affirmed that CRL was covalently bonded to ALG/NC/MMT. The optimized Taguchi Design-assisted immobilization of CRL onto ALG/NC/MMT (7 h of immobilization, 35°C, pH 5, 7 mg/mL protein loading) gave a production yield of 92.89% of Et levulinate (EL), as proven by gas chromatog.-mass spectrometric ([M] +m/z 144, C7H12O3), FTIR and NMR (CAS-539-88-8) data. A higher optimal reaction temperature (50°C) and the reusability of CRL-ALG/NC/MMT for up to 9 esterification cycles substantiated the appreciable structural rigidification of the biocatalyst by ALG/NC/MMT, which improved the catalytic activity and thermal stability of the lipase.

Enzyme and Microbial Technology published new progress about Diutina rugosa. 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

Oprescu, Elena-Emilia published the artcileSynthesis and evaluation of levulinic ester as biodiesel additives, COA of Formula: C7H12O3, the main research area is TiO2 La2O3 levulinic ester biodiesel additive.

In this study, the SO42-/TiO2-La2O3-Fe2O3 catalyst was prepared and tested in the conversion of fructose to Et levulinate. The catalyst was characterized from the point of view of the textural anal., FT-IR anal., acid strength distribution, X-ray powder diffraction and pyridine adsorption IR spectra. The influence of the reaction parameters on the Et levulinate yield was study. The maximum yield of 37.95% in levulinate esters was obtained at 180°C, 2 g catalyst and 4 h reaction time. The effect of Et levulinate addition to diesel-biodiesel blend in different rates, i.e, 0.5, 1, 2.5, 5 (w.t %) on d., kinematic viscosity and flash point was evaluated and compared with the European specification.

Revista de Chimie (Bucharest, Romania) published new progress about Biodiesel fuel. 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

Li, Ning published the artcileEsterification of levulinic acid in the production of fuel additives catalyzed by porous sulfonated carbon derived from pine needle, Related Products of esters-buliding-blocks, the main research area is esterification levulinate fuel additive catalyst porous sulfonated carbon pine.

Pine needle derived porous sulfonated carbon is facilely synthesized and subsequently applied in the levulinic acid (LA) esterification with ethanol. Various preparation parameters are optimized to improve the catalytic efficiency. The resulting heterogeneous catalysts possess a hierarchical porous structure and a high acidic d. of 2.08 mmol g-1, leading to their high activity and superior recyclability. Under the present conditions, the initial activity is maintained as high as 91.3% even after six runs. This work verifies the porous biomass-derived sulfonated carbon are highly promising catalysts for the environmentally benign synthesis of Et levulinate fuel additive.

Catalysis Communications published new progress about Biodiesel fuel. 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

Shetye, Laukik published the artcilePoly(3-hydroxybutyrate-co-3-hydroxyvalerate) synthesis in Nostoc muscorum from biodiesel industry waste: a sustainable model of bioplastic production, Category: esters-buliding-blocks, the main research area is Nostoc muscorum biodiesel industry waste bioplastic glycerol.

Poly-3-hydroxybutyrate-co-hydroxyvalerate [P(HB-co-HV)] co-polymer has superior material properties than poly-3-hydroxybutyrate (PHB) and hence exhibits wide applications, especially in the biomedical industry. But the high cost of production restricts its market potential when directly competing with synthetic polymers. Hence, the current study proposes a cost-effective model of [P(HB-co-HV)] synthesis in Nostoc muscorum using biodiesel industry waste containing glycerol as the principal organic substrate. It is the first report on [P(HB-co-HV)] synthesis in N. muscorum using unrefined glycerol as a carbon source. Our findings show that N. muscorum accumulated 31.3% cell dry weight of [P(HB-co-HV)] from the biodiesel waste production media. FTIR and GC-MS anal. confirmed the polymer obtained was [P(HB-co-HV)]. Gel permeation chromatog. anal. estimates the weight average mol. weight (Mw) of the co-polymer to be 315,420 g mol-1 with a number average mol. weight (Mn) of 74,043 g mol-1 and a polydispersity index (P.D.I.) of 4.25. TGA/DTA anal. shows that its thermal decomposition temperature [Td(100%)] was 246°C and the melting temperature (Tm) was 158°C resp. The tensile strength, elongation to break, and Young’s modulus of the [P(HB-co-HV)] films were 25.8 MPa, 62.2%, and 0.98 GPa, resp. The results indicate that cyanobacteria can synthesize PHA co-polymers similar to heterotrophic bacteria. Also, the proposed PHA synthesis model envisages a reduction in the production cost of PHA co-polymer since expensive synthetic media gets replaced with cheap and readily available raw material.

Journal of Applied Phycology published new progress about Biodiesel fuel. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Category: esters-buliding-blocks.

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

Lanaya, Salaheddine published the artcileSulfated Well-Defined Mesoporous Nanostructured Zirconia for Levulinic Acid Esterification, Safety of Ethyl 4-oxopentanoate, the main research area is sulfated zirconia mesoporous nanostructure catalyst levulinic acid esterification.

Well-organized zirconia (ZrO2) nanoparticles forming mesoporous materials were successfully synthesized via a facile micelle-templating method using cetyltrimethylammonium bromide as a structure-directing template to control the nucleation/growth process and porosity. The systematic use of such a surfactant in combination with a microwave-assisted solvothermal (cyclohexane/water) reaction enabled the control of pore size in a narrow-size distribution range (3-17 nm). The effect of solvent mixture ratio on the porosity of the synthesized oxide was determined, and the controlled growth of zirconia nanoparticles was confirmed by means of powder X-ray diffraction, small-angle X-ray scattering, transmission electron microscopy, selected area electron diffraction, high-resolution transmission electron microscopy, XPS, thermogravimetric anal., and Fourier transform IR spectroscopy as well as N2 physisorption isotherm anal. Then, the as- prepared nanostructured zirconia oxides were treated with sulfuric acid to have sulfated samples. The catalytic performances of these mesoporous zirconia nanoparticles and their sulfated samples were tested for levulinic acid (LA) esterification by ethanol, with quant. conversions of LA to Et levulinate after 8 h of reaction.

ACS Omega published new progress about Binding energy. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Safety of Ethyl 4-oxopentanoate.

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