28-Sep-2021 News Some scientific research about 4265-25-2

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The acylation of anisole with long-chain carboxylic acids (hexanoic, octanoic and decanoic) has been studied over three large pore zeolites-beta (BEA), faujasite (FAU) and mordenite (MOR). The acylation of anisole with the long chain acids produced mainly the ketone (4-methoxy phenyl alkyl ketone) and small amounts of the ester (phenyl alkanoate). The results revealed the reaction to be influenced by the type of zeolite and its Si/Al ratio (acidity) besides the chain length (carbon number) of the carboxylic acid. In the acylation of anisole with hexanoic acid, the activity of the zeolites increased with dealumination as it led to the generation of mesopores that resulted in a decrease in diffusion resistance of the zeolites. The reactivity of the acids in the acylation reaction was found to decrease with increase in the carbon number. The experimental data have been fitted into a pseudo first order kinetic model.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H312O – PubChem

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The decreasing costs and increasing availability of electronic products of all kinds, including mobile phones, audio and video equipment, and personal computers and their accessories, coupled with advances in technology that rapidly make these products obsolete, foretell a growing disposal problem. The materials employed in the present work were a mobile phone (printed circuit board + casing) and printed circuit boards alone. Pyrolysis and combustion runs at 500 C in a horizontal laboratory furnace were performed, and the analyses of the gas and semivolatile fractions (including dioxins and furans and “dioxin-like” PCBs) are shown. The mobile phone and printed circuit boards were analysed for PCDD/F and “dioxin-like” PCB content in order to establish the level of pollutant in the samples themselves. Some TG-MS experiments were carried out in order to better know the thermal decomposition of electronic wastes and identify some compounds emitted during the controlled heating of these materials. Furthermore, a kinetic study of the thermal decomposition of the electronic circuit (EC) both in nitrogen and nitrogen:oxygen atmospheres using different heating rates is presented.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H211O – PubChem

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4265-25-2, Name is 2-Methylbenzofuran, belongs to benzofurans compound, is a common compound. Quality Control of 2-MethylbenzofuranIn an article, once mentioned the new application about 4265-25-2.

N-Substituted indoles are synthesized from primary amines through a tandem reaction sequence. Initial condensation of the amine with an alpha-(o-haloaryl)ketone or aldehyde is followed by intramolecular aryl amination catalyzed by CuI. A variety of anilines and alkyl amines, including those with significant steric demands, are converted to indoles in high yields and with varying indole substitution.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H43O – PubChem

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Synthetic Route of 4265-25-2, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 4265-25-2, 2-Methylbenzofuran, introducing its new discovery.

Non-catalytic and catalytic pyrolysis of pretreated pine wood was conducted using pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). Biomass pretreatment included acid-leaching, torrefaction, and acid-leaching followed by torrefaction. Forty-five pyrolysis products were identified in the Py-GC/MS chromatograms and their peak area data evaluated by principal component analysis. In non-catalytic pyrolysis, acid-leaching pretreatment enhanced the levels of levoglucosan, while torrefaction pretreatment enhanced the proportion of catechols in the volatile products. Increasing both the temperature and catalyst loading in catalytic pyrolysis promoted the formation of aromatic hydrocarbons. At lower pyrolysis temperatures (450?500 C), acid-leaching pretreatment resulted in slightly lower proportions of aromatics, while torrefaction pretreatment had the opposite effect. Overall, temperature and catalyst loading were considerably more important factors in catalytic fast pyrolysis of pine wood than biomass pretreatment as studied by Py-GC/MS.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H327O – PubChem

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Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. SDS of cas: 4265-25-2. Introducing a new discovery about 4265-25-2, Name is 2-Methylbenzofuran

In this study, sawdust was selected as the raw material for biomass pyrolysis to obtain organic products. The catalyst was modified with two elements (Fe and Zn). Through analysis of the catalytic products, we attempted to identify a pyrolysis catalyst that can improve the yield of aromatic hydrocarbon products. ZSM-5, modified with Fe and Zn, was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and Brunauer?Emmett?Teller (BET) measurements. Tube furnace and flash pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS) were used to comprehensively investigate the characteristics of the products of biomass pyrolysis. The highest yield of phenols was obtained using the Fe-modified ZSM-5 catalyst, which was 18.30% higher than the yield obtained by the pure ZSM-5 catalyst. The lowest yield of acid products was obtained by single-metal-supported catalytic pyrolysis with Fe or Zn, which was 50.66% lower than the yield obtained by direct pyrolysis. During the pyrolysis of biomass using metal-modified catalysts, the production of aromatic hydrocarbons was greatly improved. Among them, compared with direct pyrolysis, the Fe-Zn co-modified ZSM-5 catalyst exhibited the weakest promotion of aromatic hydrocarbon formation, but there was still a 68.50% improvement. Although the co-modified catalyst did not show absolute advantages under the conditions used for this experiment, the improvements in the production of aromatics and phenolic products also showed its potential for improving bio-oil products. Under the action of Fe-modified catalysts, the most abundant components in the gas product were CO and CO2, which reached levels as high as 53.45% and 15.34%, respectively, showing strong deoxidation capabilities. Therefore, Fe-modified ZSM-5 catalysts were found to better promote the formation of aromatic hydrocarbon products of biomass pyrolysis.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H99O – PubChem

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Fast pyrolysis with cheap Ni-based catalysts was evaluated to produce bio-oil from jatropha residues. By Py-GC/MS method with catalyst/jatropha weight ratio of 6.2, Ni/zeolite-based catalysts such as NiMo(O)/Y(14) were found to be promising candidates for total hydrocarbon formations. But, with low catalyst/jatropha ratio of 0.35-0.76, the total hydrocarbon selectivities were NiMo(O)/Y(14)(71.7%) > PtPd/ZSM(38)(68.8%) > Ni2P/Y(14)(65.4%) > NiMo(O)/Beta(27)(63.9%) > NiMo(O)/ZSM(38) (60.1%) > none (36.4%), when the pyrolysis was carried out using a stainless-steel reactor under N2 gas flow. When jatropha residues (50 g) was used with NiMo(O)/Y(14) at 500 C, total liquid yield was as high as 49.9%, including 21.3% of organic liquid. Taking into account higher Aromatic/Aliphatic selectivities, lower acid selectivities at both 600 C and 500 C, Ni-based catalysts such as NiMo(O)/Y(14) were found to be effective and comparable to PtPd/ZSM(38). The acid values of organic liquids obtained at 600 C were 2.74-7.02 mg-KOH kg-1, being much lower than 28.2 mg-KOH kg-1 in the absence of catalyst. The estimated higher heating values (HHV) of the liquid were 32-33 MJ/kg. The NiMo(O)/Y(14), NiMo(O)/ZSM(38) and Ni2P/Y(14) catalysts could be regenerated by calcination at 600 C, followed by subsequent hydrogenation, and the organic liquid product yields remained constant at fresh and regenerated catalysts and total hydrocarbon selectivities were also constant within the experimental error. Thus, under these pyrolysis conditions, Ni-based catalysts seems to be better and cheaper candidates than PtPd systems.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H217O – PubChem

September 23, 2021 News Brief introduction of 4265-25-2

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Synthetic Route of 4265-25-2, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.4265-25-2, Name is 2-Methylbenzofuran, molecular formula is C9H8O. In a article,once mentioned of 4265-25-2

Farmed sea bass (Dicentrarchus labrax) fillets were smoked using one oil-based and two aqueous smoke flavorings. The headspace of the smoked products was studied by solid-phase microextraction followed by gas chromatography/mass spectrometry (SPME-GC/MS). The effect of smoking on several quality and safety characteristics of the fillets and on their evolution during vacuum-packed storage at refrigeration temperature was commented on. Special attention was paid to shelflife length. It was proved that microorganisms able to produce spoilage oxygenated metabolites did not grow in any of the smoked fillets; however, in those smoked with the oily flavoring the growth of microorganisms able to produce sulphur derivatives was observed after 20?25 days of storage. Among the smoked products, great differences were observed in relation to odor, color, texture, safety, and also in their evolution during vacuum-packed storage at refrigeration temperature; no differences were evidenced regarding oxidation derived compounds. Practical Applications: Farmed European sea bass is widely available on the market, its supply being on many occasions greater than its demand. The results of this study could be of great interest for the seafood industry because it was demonstrated that smoking of farmed sea bass fillets with smoke flavorings could be an interesting alternative method of offering ready-to-eat sea bass products to consumers. Nevertheless, it was evidenced that many different aspects of this kind of processing should be carefully addressed to obtain a safe ready-to-eat product with optimized sensory properties, and as long a shelflife as possible.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H311O – PubChem

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Reference of 4265-25-2, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.4265-25-2, Name is 2-Methylbenzofuran, molecular formula is C9H8O. In a Article,once mentioned of 4265-25-2

Benzaldehyde is an aromatic aldehyde commonly considered in bio-oil surrogate formulation, and an important intermediate in the oxidation of other aromatic reference fuels such as toluene. However, its oxidation has never been previously investigated experimentally and no product formation profiles were reported in the very limited pyrolysis studies available in the literature. In this study, the gas-phase oxidation of benzaldehyde was investigated in a jet-stirred reactor. 48 species were detected using gas chromatography, mainly CO, CO2 and phenol. The important formation of CO and phenol indicates a rapid formation of phenyl radicals. This was confirmed by a kinetic analysis performed using the current version of the CRECK kinetic model, in which the reactions of phenyl radicals and oxygenated aromatic compounds have been updated.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H221O – PubChem

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Chemistry is traditionally divided into organic and inorganic chemistry. Safety of 2-Methylbenzofuran, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent,Which mentioned a new discovery about 4265-25-2

Ruthenium nanoparticles immobilized on a Lewis-acid-functionalized supported ionic liquid phase (RuaSILP-LA) act as effective catalysts for the selective hydrogenation of benzofuran derivatives to dihydrobenzofurans. The individual components (nanoparticles, chlorozincate-based Lewis-acid, ionic liquid, support) of the catalytic system are assembled using a molecular approach to bring metal and acid sites in close contact on the support material, allowing the hydrogenation of O-containing heteroaromatic rings while keeping the aromaticity of C6-rings intact. The chlorozincate species were identified to be predominantly [ZnCl4]2- anions using X-ray photoelectron spectroscopy and are in close interaction with the metal nanoparticles. The RuaSILP-[ZnCl4]2- catalyst exhibited high activity, selectivity, and stability for the catalytic hydrogenation of a variety of substituted benzofurans, providing easy access to biologically relevant dihydrobenzofuran motifs under continuous flow conditions.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H54O – PubChem

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Electric Literature of 4265-25-2, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 4265-25-2, 2-Methylbenzofuran, introducing its new discovery.

The effect of dietary supplementation with either vitamin E (300ppm) or a red wine extract rich in polyphenols (900ppm) in an omega-3 enriched concentrate on the volatile fraction of lamb meat was assessed. The effect of refrigerated storage (0 and 6days) under high-oxygen atmospheres (70% O2/30% CO2) was also studied. Extraction and analysis of the volatile compounds was carried out by headspace solid-phase microextraction (HS-SPME) and GC-MS, respectively. Vitamin E supplementation led to lower levels of lipo-oxidation compounds, such as 2-heptanone and 1-penten-3-ol. The red wine extract was less efficient against lipid oxidation than vitamin E but more efficient than the control (no added antioxidants). The levels of numerous lipid-derived compounds were found to be lower after 6days of storage which could be due to further interactions with protein-related compounds.

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Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H257O – PubChem