Category: 539-88-8

Liu, Chenlu published the artcileEsterification of levulinic acid into ethyl levulinate catalyzed by sulfonated bagasse-carbonized solid acid, Related Products of esters-buliding-blocks, the main research area is levulinic acid esterification ethyl levulinate sugarcane bagasse sulfonated carbon.

A sulfonic carbon-based catalyst (C-SO3H) was successfully prepared by sulfonating incompletely carbonized sugarcane bagasse. The optimized catalyst of high activity in the esterification of levulinic acid (LA) with ethanol was produced under sulfonation at 150 °C for 15 h with a 75 mL/g sulfonation ratio. The prepared catalysts were characterized by X-ray powder diffraction (XRD), Fourier transform IR (FTIR) anal., SEM (SEM), and elemental anal. (EA). The bagasse-carbonized catalyst was porous, and the porous structure remained unchanged after sulfonation treatment. Moreover, the introduced acidic group was the catalytic center. A high yield of Et levulinate (ELA) of 88.2% was obtained at 120 °C for 9 h. The sulfonic carbon-based catalyst could be reused at least five times and still exhibited great stability. The application of the sulfonic carbon-based catalyst was not only the effective use of biomass resources but also promoted the production of various high value chems.

BioResources published new progress about Bagasse. 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

Zhao, D. published the artcileEfficient transfer hydrogenation of alkyl levulinates to γ-valerolactone catalyzed by simple Zr-TiO2 metal oxide systems, Related Products of esters-buliding-blocks, the main research area is zirconium titania metal oxide system ethyl levulinate valerolactone hydrogenation.

Zr-TiO2 synthesized heterogeneous catalysts could efficiently convert Et levulinates (ELs) to γ-valerolactone (GVL) using isopropanol (2-PrOH) as H-donor. Obtained catalysts were characterized by X-ray diffraction (XRD), XPS, Scanning electron microscope (SEM), High revolution transmission electron microscope (HR-TEM), Fourier transform IR spectroscopy (FT-IR), inductively coupled plasma optical emission spectroscopy (ICP-OES), NH3/CO2 temperature programmed desorption (NH3/CO2-TPD), pyridine-IR spectroscopy, H2 temperature-programmed reduction (H2-TPR), and N2 adsorption and desorption measurements. In total, 10 wt% Zr-TiO2 with average nanoparticle sizes (ca. 4-6 nm) exhibited optimum catalytic activity after optimization of reaction temperature, reaction time, catalyst loading, as well as solvent effect. GVL yield reached 74% with 79% EL conversion at 190°C for 5 h over 10 wt% Zr-TiO2 in 2-PrOH. The high catalytic activity could be attributed to an appropriate proportion of acidic/basic sites, high Bronted/Lewis acid ratio, and large surface areas. Both acidic and basic sites lead to a synergistic effect on the concurrent activation of H-donor and substrate. The major side product Et 4-hydroxypentanoate (EHP) and other byproducts were found. GVL yield achieved from Me levulinate (ML) and levulinic acid (LA) were 65% and 20%, resp. Catalyst deactivation was observed due to coke deposits on the catalyst’s surface. The spent catalyst proved to be reusable to recover almost completely its initial activity after calcination (300°C, 2 h). A plausible reaction mechanism is presented on the basis of characterization results.

Materials Today Chemistry published new progress about Acidity. 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

Hu, Lei published the artcileHighly selective hydrogenation of biomass-derived 5-hydroxymethylfurfural into 2,5-bis(hydroxymethyl)furan over an acid-base bifunctional hafnium-based coordination polymer catalyst, Product Details of C7H12O3, the main research area is hafnium coordination catalyst HMF transfer hydrogenation.

The catalytic transfer hydrogenation (CTH) pathway is a promising and appealing method for the selective hydrogenation of biomass-derived 5-hydroxymethylfurfural (HMF) into 2,5-bis(hydroxymethyl)furan (BHMF) via the Meerwein-Ponndorf-Verley (MPV) reaction, in which the development of effective and economical catalysts is of great significance. Herein, this work designed and prepared a new hafnium-based metal-organic coordination polymer (Hf-DTMP) by the simple assembly of hafnium tetrachloride (HfCl4) and diethylene triaminepenta(methylene phosphonic acid) (DTMP). Comprehensive studies demonstrated that Hf-DTMP is an amorphous and mesoporous catalyst with a strong acid-base bifunctionality, and so, it displayed excellent catalytic activity for the CTH of HMF into BHMF with a high yield of 96.8% in 2-butanol (sBuOH) at a moderate reaction temperature of 130 °C for 4 h. In addition, Hf-DTMP exhibited good heterogeneity, reusability and stability, and it could be easily recovered from the reaction mixture by filtration and consecutively used for at least 5 recycles without a dramatic loss in catalytic activity. More gratifyingly, Hf-DTMP also showed superior universality for the CTH of 5-methylfurfural (MF), furfural (FF), levulinic acid (LA), Et levulinate (EL) and cyclohexanone (CHN) into the corresponding products with high yields, obviously indicating that it has tremendous potential for the selective hydrogenation of various biomass-derived carbonyl compounds

Sustainable Energy & Fuels published new progress about Acidity. 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

Gupta, Dinesh published the artcileTopotactic transformation of homogeneous phosphotungastomolybdic acid materials to heterogeneous solid acid catalyst for carbohydrate conversion to alkyl methylfurfural and alkyl levulinate, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is phosphotungastomolybdic acid carbohydrate catalytic dehydration etherication.

The strong interaction of higher transition metal oxides with inorganic non-metals can be promising for generating highly acidic three-dimensional materials by design. A comprehensive controlled acidity of heteropolyacid-like catalyst and interpretation of the microstructure and mechanism of the formation of a versatile heterogeneous solid acid catalyst, HPW4Mo10Ox has been heterogenized by biomass-derived cystine as organic linkers to control the acidity of as-synthesized materials, which have greater acidity and complexity in separation from the reaction mixture The new and unique results obtained in catalysis done in biphasic reaction. Cystine binds to the surface of HPW4Mo10Ox, and the topotactic transition occurred, change the morphol. and lattice parameter. We described here a sustainable transformation of highly acidic (0.84 mmol g-1) heteropoly acid (HPW4Mo10Ox) to cystine anchored on the active surface of the heteropoly acid and controlled the acidity (0.63 mmol g-1) and heterogenized the materials. As synthesized materials have been showing that for the direct formation of alkyl levulinate and furanics intermediate from carbohydrates. HPW4Mo10Ox and HPW4Mo10Ox-Cys, act as acidic catalyst, and catalyze the mono- and disaccharides that are dissolved in primary and secondary alcs. to alkyl levulinate (AL) and alkyl methylfurfural at 170°C under microwave irradiation with glucose as the substrate, AL yield reaches 62% with 84.95% selectivity. The catalyst can be easily recovered by filtration and min. five times reused after calcination without any substantial change in the product selectivity. The anal. anal. of as-synthesis materials done by NH3-TPD, BET, XRD, FESEM, TEM, HRTEM, FTIR, ATR, TGA, DTA to stabilized the morphol. and acidity controlled mechanism.

RSC Advances published new progress about Acidity. 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

Shin, Mi published the artcileEtherification of biomass-derived furanyl alcohols with aliphatic alcohols over silica-supported nickel phosphide catalysts: Effect of surplus P species on the acidity, Application of Ethyl 4-oxopentanoate, the main research area is etherification biomass furanyl alc aliphatic silica nickel phosphide catalyst.

The acidity of nickel phosphide (Ni2P) catalysts plays a crucial role in producing a desired hydrodeoxygenation mol. from biomass-derived substrates; yet, it has never been explored in acid-catalyzed reactions. Herein, we demonstrated the activity of silica-supported Ni2P catalyst prepared with the nominal P/Ni ratio of 2 (Ni2P/SiO2-2P) in the etherification of furanyl alcs. (particularly, 5-(hydroxymethyl)furfural) with aliphatic alcs. including ethanol. By comparing the characteristics of Ni/SiO2, PxOy/SiO2, and Ni2P/SiO2-xP (x = 0.5 and 1), Ni2P/SiO2-2P was revealed to contain the Bronsted and Lewis acid sites of which both contributed to the etherification reaction. Notably, the Bronsted acidity was associated with the surplus P species added to produce the Ni2P phase. Consequently, supported Ni2P catalysts can work in acid-catalyzed reactions if an adequate ratio of Bronsted to Lewis acid sites is provided by the amount of the surplus P species determined by adjusting the P/Ni ratio.

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

Oh, Shinyoung published the artcilePretreatment of bio-oil with ion exchange resin to improve fuel quality and reduce char during hydrodeoxygenation upgrading with Pt/C, Product Details of C7H12O3, the main research area is bio oil ion exchange resin pretreatment hydrodeoxygenation fuel quality; Bio-oil; Pt/C catalyst; hydrodeoxygenation; ion-exchange resin; solid acid catalyst.

To obtain high-quality biofuel, bio-oil obtained from fast pyrolysis of woody biomass was pretreated with ion exchange resin (amberlyst 36) at 50°C, 100°C, and 150°C, and then the recovered liquid product was upgraded using hydrodeoxygenation (HDO) with Pt/C at 300°C. After the two-stage upgrading, 4 types of products (gas, light oil, heavy oil, and char) were obtained. Two-immiscible liquid products were consisted of organic heavy oil, derived from bio-oil, and aqueous light oil, based on the ethanol. The mass balances of the HDO products were influenced by the pretreatment temperature Ion exchange pretreatment of bio-oil was effective in reducing the char formation during the hydrodeoxygenation (HDO) process. The pretreatment also improved the following heavy oil properties: the water content, heating value, viscosity, acidity, and oxygen level. As a parameter used to indicate the biofuel acidity, the total acid number (TAN) value, was clearly reduced from 114.5 (bio-oil) to 34.1-78.2 (heavy oils). Furthermore, the water and oxygen contents of bio-oil (21.1 and 52.6 wt%, resp.) declined after the pretreatment followed by HDO (ranged 5.1-6.9 and 19.0-25.5 wt%, resp.), thereby improving its higher heating value (HHV) from 17.2 MJ/kg (bio-oil) to 26.2-28.1 MJ/kg (heavy oils). The degree of deoxygenation (DOD) increased as the pretreatment temperature decreased, and the highest energy efficiency (79.8%) was observed after pretreatment at 100°C. In terms of catalyst deactivation during the reaction, both carbon deposition and surface cracking intensified with increasing pretreatment temperatures

Environmental Technology published new progress about Acidity. 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

Zhang, Shuai published the artcileConversion of biomass-derived levulinate esters to γ-valerolactone with a robust CuNi bimetallic catalyst, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is levulinate ester valerolactone preparation bimetallic catalyst optimization study property.

A high-performance Cu-Ni bimetallic catalyst supported on Zr-Al oxides was fabricated for catalyzing the transfer hydrogenation of levulinate esters to γ-valerolactone (GVL) under mild conditions. The Cu2Ni1/Zr3Al7Oz catalyst provided the highest Et levulinate conversion of 99% with 96.8% GVL yield at 150°C in 8 h employing 2-Bu alc. (2-BuOH) as the hydrogen source. The catalyst was also used successfully for the catalytic transfer hydrogenation (CTH) of a series of levulinate esters. Moreover, the catalyst still retained high activity after recycling for 4 times. The outstanding catalytic performance and selectivity of Cu2Ni1/Zr3Al7Oz, together with its low-cost nature, make it have great application potential as a catalyst for the fabrication of GVL on a large scale in industry.

New Journal of Chemistry published new progress about Acidity. 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

Zhang, Luxin published the artcileDirect production of ethyl levulinate from carbohydrates and biomass waste catalyzed by modified porous silica with multiple acid sites, Product Details of C7H12O3, the main research area is silica solid acid catalyst biomass precursor ethyl levulinate production.

Three modified porous silica solid acid catalysts with multiple acid sites (SO3H-Al/Silica, SO3H-Al-Zr/Silica, and SO3H-Zr/Silica) were prepared and characterized. The Pyridine-IR spectra showed that both Bronsted (B) and Lewis (L) acid sites were present in all three catalysts. Catalytic acid sites with different acid strengths were also found, including strong sulfonic acids and several weak acids. The prepared solid acid catalysts were used to catalyze the ethanolysis of glucose, glucosyl-based carbohydrates, and starchy food waste to produce Et levulinate (EL). The formation of EL was promoted by the synergistic effect between multiple acid sites on the catalysts. A higher B/L ratio and -SO3H amount promoted the production of EL. The catalytic activity was pos. correlated to the sp. surface area of the catalysts. Promising results were obtained for SO3H-Al/Silica: the maximum EL yield from glucose was 47.9%, and a small amount of 5-ethoxymethylfurfural was detected as a byproduct. Cellobiose, cellulose, expired wheat flour, and kitchen waste were also used as raw materials to produce EL, affording EL yields in the range of 1.6-38.9%. Finally, the stability of the prepared catalysts was explored after reuse and hot filtration.

Process Biochemistry (Oxford, United Kingdom) published new progress about Acidity. 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

Gao, Zhaoping published the artcileHighly efficient hydrogenation of biomass oxygenates to alcohol products on MOF composite catalysts, Product Details of C7H12O3, the main research area is copper cobalt ceria hydrogenation catalyst biomass oxygenate.

Selective hydrogenation of biomass oxygenates to valuable chems. is a desired catalytic process from energy and environment. Traditional catalysts for selective hydrogenation of biomass oxygenates are prepared from co-impregnation or co-precipitation method. In this work, 93.6% of a 1,4-pentanediol yield as well as high stability was obtained on CeO2 supported cobalt and copper species (Cu3Co1/CeO2) by pyrolyzing a MOF composite from one-pot synthesis. Comparison showed that catalytic performances on Cu3Co1/CeO2 were higher than most literature sources, Cu3Co1/CeO2-CP and individual Co0 or Cu0 on CeO2. Addnl., Cu3Co1/CeO2 also presents the yields of higher than 92.5% for γ-valerolactone, furfural, benzaldehyde, acetophenone and phenol to corresponding alc. products. Characterization results indicated high catalytic results are derived from the coexistence of highly dispersed Cu0 and strong Lewis acid, copper and cobalt oxides, on Cu3Co1/CeO2. Redox support CeO2 facilitates dispersion of cobalt while the synergistic effect on dispersion and reduction of cobalt and copper achieves high efficient hydrogenation of biomass oxygenates.

Journal of the Taiwan Institute of Chemical Engineers published new progress about Acidity. 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

Zainol, Muzakkir Mohammad published the artcileSynthesis and characterization of porous microspherical ionic liquid carbon cryogel catalyst for ethyl levulinate production, SDS of cas: 539-88-8, the main research area is porous microspherical ionic liquid carbon cryogel catalyst ethyl levulinate.

A new type of carbon cryogel was synthesized from ionic liquid, a green solvent, and furfural mixtures Initially, the gel, formed via sol-gel polycondensation reaction, was freeze-dried, calcined and denoted as CCIL. The effect of furfural to IL (F/IL) ratio, water to IL (W/IL) ratio and sulfuric acid loading on the synthesis of gel was investigated. In addition, the effect of calcination temperature and time were also studied for CCIL preparation The phys. and chem. properties were evaluated with nitrogen physisorption, temperature programmed desorption of ammonia (NH3-TPD), and thermogravimetric analyzer (TGA). Fourier transform IR spectroscopy (FTIR), X-ray diffraction (XRD), field emission SEM with energy dispersive X-ray spectrometry (FESEM-EDX), CHNS anal., total organic carbon (TOC) and NMR spectroscopy (NMR) results were also analyzed. Catalytic testing, conducted to evaluate the performance of CCIL in esterification of levulinic acid with ethanol, inferred large total surface area and high acidity corroborated with good activity. The selected CCIL registered Et levulinate yield of 66.9 mol%. The exptl. results demonstrated the catalyst, derived from new feedstocks, is a potential solid acid catalyst for biomass conversion.

Diamond and Related Materials published new progress about Acidity. 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