Category: esters-buliding-blocks

Zhao, Pingping published the artcileSynergistic Effect of Different Species in Stannic Chloride Solution on the Production of Levulinic Acid from Biomass, Application of Ethyl 4-oxopentanoate, the main research area is synergistic species stannic chloride solution levulinate biomass.

Metal chloride has shown high potential in biomass conversion to valuable chems., but the nature of active species and the corresponding performances on each successive reaction step need further elucidation. In this work, SnCl4 was found to exhibit satisfactory catalytic activity, achieving 64.6 mol % yield of levulinic acid from corncob residue. The levulinic acid obtained could be further converted to more valuable Et levulinate with 85% yield without any extra catalyst addition In water medium, the hydrolysis of SnCl4 resulted in the formation of stannic oxide, H+ and Cl-, which showed a synergistic effect and all contributed to levulinic acid production It was demystified that Cl- promoted cellulose hydrolysis, and the formed H+ as Bronsted acid mainly contributed to cellulose hydrolysis and fructose dehydration, as well as HMF decomposition to levulinic acid. Sn(IV) species facilitated both glucose-to-fructose isomerization and fructose consumption yielding undesirable polymers, but exhibited a neg. influence on cellulose hydrolysis. The proposed kinetic model showed a good fit with the exptl. result, and further confirmed the proposed catalytic mechanism. The insights reported here might give some useful information for the development of effective catalysts to produce valuable chems. directly from raw lignocelluloses.

ACS Sustainable Chemistry & Engineering 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 of Ethyl 4-oxopentanoate.

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

Song, Jinliang published the artcileStrong Oxophilicity of Zr Species in Zr4+-Exchanged Montmorillonite Boosted Meerwein-Ponndorf-Verley Reduction of Renewable Carbonyl Compounds, Safety of Ethyl 4-oxopentanoate, the main research area is oxophilicity zirconium species exchanged montmorillonite Meerwein Ponndorf Verley reduction.

Meerwein-Ponndorf-Verley (MPV) reduction of biomass-derived carbonyl compounds is a greatly promising route for biomass valorization. Robust, facile-prepared, and cost-effective inorganic Zr-based catalysts for this transformation remain highly desirable. Herein, Zr-containing montmorillonite (denoted as Zr-MMT) was constructed by the ion exchange of Zr4+ with the interlayer cations of montmorillonite (MMT). Very interestingly, as an inorganic catalyst, the prepared Zr-MMT showed high catalytic activity for MPV reduction of various biomass-derived carbonyl compounds Systematic investigations revealed that the excellent performance of Zr-MMT predominantly originated from more pos. charged Zr species ([Zrx(OH)y(H2O)n](4x-y)+), which could boost the activation of the carbonyl group and simultaneously promote the hydrogen transfer process assisted by suitable basic sites on MMT. Notably, the preparation of Zr-MMT avoided the utilization of surfactants or expensive organic ligands, and the prepared Zr-MMT showed better or comparable catalytic performance than most reported Zr-containing catalysts, significantly enabling it to be more practical.

ACS Sustainable Chemistry & Engineering 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

Hamdi, Jumanah published the artcileHalloysite-Catalyzed Esterification of Bio-Mass Derived Acids, Name: Ethyl 4-oxopentanoate, the main research area is halloysite catalyzed esterification bio acid.

Halloysite, a natural clay with a hollow tubular structure, was studied as a catalyst for the esterification of biomass-derived carboxylic acids (levulinic acid, fumaric acid, maleic acid, and succinic acid) with four different alcs. (MeOH, EtOH, n-PrOH, and n-BuOH). Reaction conditions were optimized (10 mol % halloysite, 170 °C, 24 h) and gave high yields of the corresponding esters and diesters (>90%). The halloysite was easily recovered and recycled after washing and drying.

ACS Omega 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, Name: Ethyl 4-oxopentanoate.

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

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

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

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

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

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

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