Esters-buliding-blocks

Bunrit, Anon published the artcilePhoto-Thermo-Dual Catalysis of Levulinic Acid and Levulinate Ester to γ-Valerolactone, SDS of cas: 539-88-8, the main research area is photo thermo dual catalysis levulinic acid levulinate ester valerolactone.

Herein, we developed photo-thermo-dual catalytic strategies for the production of γ-valerolactone (GVL) from levulinic acid (LA) and its ester using platinum-loaded TiO2 as a dual-functional catalyst. Both catalytic systems were evaluated under mild reaction conditions. In the photocatalysis system, a base plays crucial roles in the conversion of LA and EL to GVL. The control experiments reveal that plausible mechanistic pathways of both systems proceed via the hydrogenation of the ketone group of LA to the corresponding alc. as a major intermediate followed by a subsequent cyclization step to GVL. This dual-functional catalyst provides alternative strategies for the conversion of LA and its ester into GVL, which could pave the way for biomass utilization in a more effective and practical manner.

ACS Catalysis published new progress about Biomass. 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

Yang, Shuhua published the artcileStudy on the influence of different catalysts on the preparation of ethyl levulinate from biomass liquefaction, Safety of Ethyl 4-oxopentanoate, the main research area is ethyl levulinate biomass liquefaction heating.

The liquefaction experiments of straw biomass under heating and pressure were carried out with sulfuric acid and three ionic liquids as catalysts, 1-Butyl-3-methylimidazolium chloride ([BMIM] [Cl]), 1-Butyl-3-methylimidazolium hydrogen sulfate ([BMIM] [HSO4]), 1-methyl-3-(4-sulfobutyl) imidazole bisulfate ([HSO3-BMIM] [HSO4]), and anhydrous ethanol as solvent. The effects of catalyst type and dosage, reaction time and reaction temperature on liquefaction were investigated and optimized. The results showed that under the catalysis of sulfuric acid, the yield of Et levulinate was the highest; [HSO3-BMIM] [HSO4], the conversion of raw materials was the highest; when sulfuric acid was used as catalyst, the optimum reaction conditions were catalyst dosage 10%, reaction temperature 190 °C, reaction time 60 min, the yield of Et levulinate (EL) was 18.11%, and the conversion of raw materials was 75%. When [HSO3-BMIM] [HSO4] was used as catalyst, the optimum reaction conditions were as follows: catalyst dosage 26%, reaction temperature 200 °C, reaction time 60 min, the yield of EL was 10.2%, conversion of raw material 85.31%.

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

Yun, Wan-Chu published the artcileMicrowave Irradiation-Enhanced Catalytic Transfer Hydrogenation of Levulinic Acid to γ-Valerolactone Using Ruthenium: A Comparative Study with Conventional Heating Processes, Computed Properties of 539-88-8, the main research area is levulinic acid ruthenium catalyst hydrogenation microwave Irradiation.

Conversion of biomass-derived levulinic acid to γ-valerolactone (GVL) via catalytic transfer hydrogenation (CTH) using conventional oven heating (COH) is associated with issues, such as long reaction time, and low yield. Microwave irradiation (MWI) appears to be a solution to address these issues as MWI can shorten reaction times and enhance yields. To explore effectiveness of MWI for LA conversion, MWI and COH are compared for LA conversion via CTH catalyzed by a model catalyst, Ru/C. Through investigating the effects of temperature and reaction time, MWI is validated to shorten the reaction time and enhance LA conversion efficiencies in comparison with COH. The optimal condition for the full LA conversion to GVL by Ru/C using MWI is 160°C for 30 min with 10 mg (Ru/C)/mL (2-PrOH). MWI is also validated to improve conversion of several common levulinate esters (LAEs) to GVL. The regenerated Ru/C can also exhibit almost the same catalytic activity as the pristine Ru/C for LA conversion using MWI. These results indicate that Ru/C is a highly-effective catalyst for LA conversion and MWI can further enhance LA conversion by Ru/C by shortening reaction time and increasing yield of GVL. Thus, MWI is a promising process for enhancing biomass conversion.

Waste and Biomass Valorization published new progress about Biomass. 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

Hao, Jianxiu published the artcileFacile use of lignite as robust organic ligands to construct Zr-based catalysts for the conversion of biomass derived carbonyl platforms into alcohols, Related Products of esters-buliding-blocks, the main research area is lignite zirconium catalyst biomass carbonyl platform alc.

Use of lignite under mild conditions without destroying the natural functional groups and structures is a potential approach for the value-added utilization of lignite. Considering the abundant acidic functional groups in lignite, in this work, a novel and facile route using lignite as robust organic ligands to construct Zr-based catalysts was proposed, and the designed catalysts were applied in the conversion of biomass-derived carbonyl mols. into valuable chems. The universality of the proposed route for different rank coals and substrates with various structures were analyzed. Both the preparation conditions of the catalysts and the reaction parameters were systematically investigated. The obtained catalysts were characterized by SEM-EDS, XRD, FTIR, Raman, and TG, etc. The results demonstrated that the designed catalysts were highly efficient for the selective conversion of furfural into furfuryl alc. Under the optimized conditions, the conversion, yield, and selectivity were up to 93.4%, 81.0%, and 86.7%, resp. Both the reaction conditions and the performances of the catalyst were competitive compared with analogous catalysts. It was proved that the catalyst was heterogeneous and the reusability could be improved through demineralization of lignite via acid washing before use, and the catalyst prepared by demineralized lignite had no obvious changes in both performances and structures after 5 reuses. The proposed route was also identified to be applicable for other low rank coals besides lignite, such as long flame coal and coking coal. The catalyst prepared using lignite was robustly effective for the conversion of various carbonyl compounds with different structures, indicating the broad universality for different substrates. Detailed characterization showed that the performances of the catalyst were jointly influenced by both Zr contents and surface areas of the catalyst. This novel route of constructing Zr-based catalysts using low rank coal as raw materials is highly potential for application in the utilization of low rank coals and biomass resources, with the advantages of high efficiency of the catalysts, low cost of raw materials, and simple preparing process.

Fuel published new progress about Biomass. 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

Wang, Tianlong published the artcileMPV reduction of ethyl levulinate to γ-valerolactone by the biomass-derived chitosan-supported Zr catalyst, SDS of cas: 539-88-8, the main research area is reduction ethyl levulinate gamma valerolactone biomass chitosan zirconium catalyst.

Herein, we used the biopolymer chitosan as a support to synthesize a biomass-derived catalyst (chitosan-Zr) to achieve GVL in 97% yield from MPV reduction of EL, by using isopropanol as a hydrogen source. The catalyst system is also applicable to the reduction of various organic compounds with carbonyl groups. Addnl., we have proposed a possible mechanism for this reaction based on the systematic investigation towards the reaction. Moreover, the recycle and reuse experiment showed that this chitosan-Zr exhibited long-life catalytic performance and can maintain its high catalytic performance even after five runs of recycle and reuse experiments

New Journal of Chemistry published new progress about Biomass. 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

Kondeboina, Murali published the artcileBimetallic Ni-Co/γ-Al2O3 catalyst for vapour phase production of γ-valerolactone: Deactivation studies and feedstock selection, HPLC of Formula: 539-88-8, the main research area is nickel cobalt alumina catalytic vapor phase reaction valerolactone.

With an aim to establish supported nonnoble Co metal catalysts for production of a promising fuel and fuel additive γ-valerolactone (GVL) at ambient pressure in continuous mode, Co/γ-Al2O3 and bimetallic Ni-Co/γ-Al2O3 catalysts were prepared and their catalytic activities vs. catalytic features were correlated. Ni-Co/γ-Al2O3 catalyst exhibited GVL productivity of 1.125 kgGVL.kg-1catalysth-1 which is relatively higher than Co/γ-Al2O3 catalyst. Ni-Co/γ-Al2O3 catalyst is stable during 12 h time-onstream studies while Co/γ-Al2O3 catalyst suffers from deactivation. The addition of Ni to Co/γ-Al2O3 augments the resultant bimetallic catalyst activity and coke resistance capacity. As evidenced from XRD, H2-TPR, XPS analyses the addition of Ni to Co/γ-Al2O3 gave Ni-Co alloy in the bimetallic catalysts. H2-pulse chemisorption studies and TEM analyses illustrate formation of smaller particles in bimetallic Ni-Co/γ-Al2O3 catalyst which in turn influenced the rate of formation of GVL. From TGA of spent catalysts, the C deposition rate is decreased in the case of Ni-Co/γ-Al2O3 catalyst (0.43 mmol.g-1cat.h-1) than Co/γ-Al2O3 catalyst (1.014 mmol.g-1cat.h-1). Among the feedstocks of GVL i.e. levulinic acid, Me levulinate, Et levulinate, Et levulinate is prominent in constantly yielding GVL during 24 h study over bimetallic Ni-Co/γ-Al2O3 catalyst.

Fuel published new progress about Biomass. 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

Schwarz, Luisa Vivian published the artcileSelection of low nitrogen demand yeast strains and their impact on the physicochemical and volatile composition of mead, Product Details of C11H22O2, the main research area is mead physicochem volatile composition nitrogen demand yeast strain; Honey; Mead; Nitrogen demand; Volatile compounds; Yeast.

Mead is an ancient alc. beverage produced through the fermentation of a diluted solution of honey. Due to the peculiar and varied composition of honey, mead production faces several problems, such as slow or stuck fermentations mainly due to the low nitrogen concentration, lack of uniformity of the final product and the production of unpleasant aromas. In this context, this work aimed to select low nitrogen-demand yeast strains and evaluate their potential for the production of mead. Therefore, among 21 com. wine yeast strains, 5 were selected based on their fermentative behavior at low assimilable nitrogen concentrations The selected strains were further evaluated for their contributions in meads produced with limited nitrogen availability, and the results showed significant differences on some physicochem. parameters like biomass production, residual sugars, glycerol concentration, and fermentative rate. Moreover, meads obtained with selected strains differed in the concentration of several volatile compounds The volatile compounds concentration and the principal component anal. based on odor activity values allowed separating strains into three groups. In general, S. cerevisiae var bayanus strains (QA23, Spark, and AWRI-R2) were the largest producers of aromatic compounds, particularly those with floral and fruity descriptors. The selection of yeast strains with low nitrogen-demand and different volatile compounds production can be explored by mead makers to limit fermentation problems and obtain characteristic products.

Journal of Food Science and Technology (New Delhi, India) published new progress about Biomass. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Product Details of C11H22O2.

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

Esakkimuthu, Sivakumar published the artcileSimultaneous induction of biomass and lipid production in Tetradesmus obliquus BPL16 through polysorbate supplementation, Safety of Methyl docosanoate, the main research area is Tetradesmus biomass lipid polysorbate.

The strategic microalgal lipid production without growth reduction is the desideratum for sustainable microalgal biodiesel production The present study investigated the effect of polysorbates (polysorbate 20, polysorbate 40, polysorbate 60 & polysorbate 80) supplementation on growth, biomass and lipid production of microalga Tetradesmus obliquus BPL16. T. obliquus BPL16 at controlled condition showed 12.5% dry cell weight (DCW) of lipid content and 0.8 g L-1 of biomass production Each of the four tested polysorbates at various concentrations magnificently influenced the green microalga with a maximum lipid production of 47.1% DCW and 46.5% DCW achieved at 0.15% of polysorbate 80 and 0.1% of polysorbate 60 supplementations resp. The maximum biomass (2.6 g L-1) production was achieved at 0.15% of polysorbate 40 and polysorbate 60 supplementation resp. In addition, neutral lipids and vital fatty acids proportion increased at high lipid productive conditions enabled by polysorbate supplementation.

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

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

Tian, Yi published the artcileA New Sulfonic Acid-Functionalized Organic Polymer Catalyst for the Synthesis of Biomass-Derived Alkyl Levulinates, Application In Synthesis of 539-88-8, the main research area is sulfonate functionalized organic polymer catalyst biomass alkyl levulinate.

Alkyl levulinates are important biobased chems. with great fuel-blending properties and good reactivity. In this work, a new functionalized nitrogen-containing organic polymer bearing sulfonic acid groups (PDVTA-SO3H) was successfully prepared and studied for the esterification of levulinic acid with alcs. to produce alkyl levulinates. The results showed that this sulfonic acid-functionalized organic polymer possessed high catalytic activity, and the yield of Bu levulinate reached 97.4% under the mild conditions. PDVTA-SO3H exhibited strong acidic sites and high stability, and would be well expected to be a potential candidate better than some com. sulfonic solid catalysts for alkyl levulinates production The catalyst had been reused without any treatment for five times and the results proved its potential for industrial applications.

Catalysis Letters published new progress about Biomass. 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

Yadav, Priyanka published the artcileHydrothermal liquefaction of Fe-impregnated water hyacinth for generation of liquid bio-fuels and nano Fe carbon hybrids, Application of Methyl decanoate, the main research area is iron carbon hybrid liquid bio fuel hydrothermal liquefaction; Bio-oil; Fe carbon hybrids; Hydrothermal liquefaction; Light and heavy oil; Water hyacinth.

In this work, hydrothermal liquefaction experiments of iron impregnated water hyacinth were performed with a motive to enhance bio-oil yields along with generation of nanometal carbon hybrids. Iron nanoparticles were impregnated and its metal loading was determined by ICP-MS. The impact of operating parameters like temperature, biomass to water ratio and reaction time on bio-oil yields was studied. During hydrothermal liquefaction a maximum total bio-oil yield of 38.1% was obtained at 280°C along with formation of nanometal carbon hybrids. The light oil and heavy oil fractions were characterized by GCMS and NMR for determining the key components. The light oil mainly comprises of alkanes, alcs. and esters whereas heavy oil contains esters, ethers, carboxylic acids and phenols. XRD and XPS of Fe-impregnated water hyacinth and residues confirmed the transition of Fe+3/+2 to Fe0. TEM anal. resulted an average particle size of Fe nanoparticles around 19.6 nm.

Bioresource Technology published new progress about Biomass. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Application of Methyl decanoate.

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