Tag: M.W=100-150

Liu, Yuan published the artcilePreparation of carbonyl precursors for long-chain oxygenated fuels from cellulose ethanolysis catalyzed by metal oxides, Product Details of C4H8O3, the main research area is metal oxide carbonyl precursor oxygenated fuel cellulose ethanolysis.

Long-chain oxygenated liquid fuels have similar physicochem. properties with diesel fuel, and its oxygen can promote combustion and reduce PM2.5. An approach for the preparation of the precursor from lignocellulose suitable for C-C coupling is the key problem to be solved in the production of long-chain oxygenated fuels. In this work, cellulose, as a main component in biomass, was directly alcoholyzed to carbonyl compounds with α-H catalyzed by three typical metal oxides (CaO, MgO and ZnO). The results showed that high temperature was favorable for the conversion of cellulose, but a large number of side products, namely levoglucosan and ethyl-α-D-pyran glucoside, have been detected in liquefied products. These byproducts could be transformed into target precursors with α-H over CaO or ZnO with 0.5 mmol at 320°C in ethanol solvent. Addnl., side reactions of ethanol at elevated temperature could be inhibited with ZnO in water-ethanol co-solvent and the byproducts from ethanol dehydration, including 1,1-diethoxyethane, 2-ethoxyethanol, dropped significantly with an increase in carbonyl compounds Noticeably, compared with pure ethanol, the yield of carbonyl compounds in liquid products increased obviously to 47.4% when the volume ratio of water to ethanol was 3: 10.

Fuel Processing Technology published new progress about Biofuels. 623-50-7 belongs to class esters-buliding-blocks, name is Ethyl 2-hydroxyacetate, and the molecular formula is C4H8O3, Product Details of C4H8O3.

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

Ghahremani, Milad published the artcileA Theoretical Analysis on a Multi-Bed Pervaporation Membrane Reactor during Levulinic Acid Esterification Using the Computational Fluid Dynamic Method, SDS of cas: 539-88-8, the main research area is multi bed pervaporation membrane reactor levulinic acid esterification; computational fluid dynamic method; computational fluid dynamic (CFD) method; esterification process; modeling and simulation; pervaporation membrane reactor.

Pervaporation is a peculiar membrane separation process, which is considered for integration with a variety of reactions in promising new applications. Pervaporation membrane reactors have some specific uses in sustainable chem., such as the esterification processes. This theor. study based on the computational fluid dynamics method aims to evaluate the performance of a multi-bed pervaporation membrane reactor (including poly (vinyl alc.) membrane) to produce Et levulinate as a significant fuel additive, coming from the esterification of levulinic acid. For comparison, an equivalent multi-bed traditional reactor is also studied at the same operating conditions of the aforementioned pervaporation membrane reactor. A computational fluid dynamics model was developed and validated by exptl. literature data. The effects of reaction temperature, catalyst loading, feed molar ratio, and feed flow rate on the reactor’s performance in terms of levulinic acid conversion and water removal were hence studied. The simulations indicated that the multi-bed pervaporation membrane reactor results to be the best solution over the multi-bed traditional reactor, presenting the best simulation results at 343 K, 2 bar, catalyst loading 8.6 g, feed flow rate 7 mm3/s, and feed molar ratio 3 with levulinic acid conversion equal to 95.3% and 91.1% water removal.

Membranes (Basel, Switzerland) published new progress about Catalysts. 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

He, Yunfei published the artcileSulfated complex metal oxides solid acids with dual Bronsted-Lewis acidic property for production of 5-ethoxymethylfurfural from biomass-derived carbohydrates, Computed Properties of 539-88-8, the main research area is sulfated metal oxide production ethoxymethylfurfural biomass derived carbohydrate.

The transformation of aldose-based carbohydrates into 5-ethoxymethylfurfural (EMF) is very challenging as compared to ketose-based carbohydrates, but the formers are more abundant and cheaper. Here, a series of sulfated complex metal oxides was synthesized for the conversion of aldose-based mono-, di-, and poly-saccharides, as well as starchy food waste into EMF. The catalysts were carefully characterized and the results showed that the type and strength of the acid sites were more important than their concentration It was also shown that the efficiency of these catalysts was significantly affected by the metal species in the catalyst composition and followed the order tetra- > tri- > bi- > mono-component metal oxides based catalyst. Among the prepared catalysts, Zr-Sn-Fe-Al-O-S exhibited superior catalytic activity, with an EMF yield of 33.1% from glucose, and yields ranging from 4.1-26.3% for di-, poly-saccharides and starchy food waste in ethanol/dimethyl sulfoxide solvent system under glucose/catalyst mass ratio of 4. The role of co-solvent in the reaction pathway was also studied. It was found that the predominant reaction pathway for EMF production was closely related to the co-solvent amount A kinetic model of glucose conversion to EMF was developed and the thermodn. anal. was performed, the main features of the exptl. observations can be described by the model. Zr-Sn-Fe-Al-O-S was reused for four runs without intermediate regeneration steps, showing a slight decay in activity. After reactivation by calcination before the fifth cycle, the catalyst recovered its activity, indicating good reusability and thermal stability.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Catalysts. 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

Sun, Kai published the artcileConversion of monosaccharides into levulinic acid/esters: impacts of metal sulfate addition and the reaction medium, Synthetic Route of 539-88-8, the main research area is inorganic metal salt catalyst glucose fructose dehydration.

Inorganic salts could be used as catalysts for the effective conversion of sugars. In this study, the impacts of various metal sulfates (Na2SO4, K2SO4, MnSO4, CoSO4, NiSO4, ZnSO4, CuSO4, Fe2(SO4)3, La2(SO4)3 and Ce(SO4)2) on the conversion of glucose/fructose to levulinic acid in varied reaction media were evaluated. The sulfates themselves showed varied activity and selectivity for the conversion of the sugars to levulinic acid/esters or 5-hydroxymethylfurfural (HMF), depending on the coordination with the reaction medium. K2SO4 or Na2SO4 could catalyze the production of HMF from glucose/fructose in water, while in DMSO the yield of HMF was substantially higher. In THF, nevertheless, almost no HMF was formed, while other sulfates such as NiSO4 in THF could effectively catalyze the conversion of fructose to HMF. In alcs., Fe2(SO4)3 was the most effective sulfate for the conversion of the sugars to levulinic acid/esters, and the alcs. could effectively suppress the polymerization of the sugars. The distinct catalytic performances of the sulfates in the varied reaction media originated from their different coordination or chelation with the sugars and the reaction medium.

Journal of Chemical Technology and Biotechnology published new progress about Chelation. 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

Kurkiewicz, S. published the artcileContemporary analytical techniques reveal the secret composition of a 19th century Jerusalem Balsam, Formula: C4H8O3, the main research area is vanillic acid Impatiens volatile compound.

In 1719, Antonio Menzani di Cuna from the Saint Savior monastery published an alc. extract formula made from plant and herb resins under the name Jerusalem Balsam. The Balsam gained high popularity due to its remedial benefits. At the end of the 19th century, Jerusalem Balsam produced by the hermit Johannes Treutler was found to be particularly popular. We analyzed a sample of a valuable find coming from the last decade of the 19th century, making it probably the oldest surviving Jerusalem Balsam in the world. The purpose of this work was to investigate the composition of the historical sample and to try to determine the origin of its components. This was achieved by comparing the profile of volatile compounds extracted from the balsam using HS-SPME technique with the profile characteristic for plant resins as classic ingredients of the Johannes Treutler formula. The use of two chromatog. columns of different polarity, as well as the transformation of the polar components of the sample into TMS derivatives, allowed to obtain new information on the historical composition of the Balsam. Also, it can be stated with high probability that plant resins were indeed used in the production of the Balsam as referred to in the original recipe of Johannes Treutler. We also discuss challenges in determining the original composition of the Balsam.

Pharmazie published new progress about Impatiens. 623-50-7 belongs to class esters-buliding-blocks, name is Ethyl 2-hydroxyacetate, and the molecular formula is C4H8O3, Formula: C4H8O3.

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

Kurkiewicz, S. published the artcileContemporary analytical techniques reveal the secret composition of a 19th century Jerusalem Balsam, SDS of cas: 539-88-8, the main research area is vanillic acid Impatiens volatile compound.

In 1719, Antonio Menzani di Cuna from the Saint Savior monastery published an alc. extract formula made from plant and herb resins under the name Jerusalem Balsam. The Balsam gained high popularity due to its remedial benefits. At the end of the 19th century, Jerusalem Balsam produced by the hermit Johannes Treutler was found to be particularly popular. We analyzed a sample of a valuable find coming from the last decade of the 19th century, making it probably the oldest surviving Jerusalem Balsam in the world. The purpose of this work was to investigate the composition of the historical sample and to try to determine the origin of its components. This was achieved by comparing the profile of volatile compounds extracted from the balsam using HS-SPME technique with the profile characteristic for plant resins as classic ingredients of the Johannes Treutler formula. The use of two chromatog. columns of different polarity, as well as the transformation of the polar components of the sample into TMS derivatives, allowed to obtain new information on the historical composition of the Balsam. Also, it can be stated with high probability that plant resins were indeed used in the production of the Balsam as referred to in the original recipe of Johannes Treutler. We also discuss challenges in determining the original composition of the Balsam.

Pharmazie published new progress about Impatiens. 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

Ichikawa, Eri published the artcileEffect of koji starter on metabolites in Japanese alcoholic beverage sake made from the sake rice Koshitanrei, Synthetic Route of 5405-41-4, the main research area is metabolite koji starter alc beverage sake rice Koshitanrei; Koshitanrei ; koji starter; metabolite; metabolome analysis; sake.

In sake brewing, the steamed rice is used in 2 ways, added to sake-mash and making rice-koji. Rice-koji is made from the steamed rice by using koji starter, and its quality is an important determinant of the aroma/taste of sake. The sake rice Koshitanrei (KOS) was developed in Niigata Prefecture by crossing 2 sake rice varieties, Gohyakumangoku and Yamadanishiki. Recently, we reported the characteristic components/metabolites in sake made from KOS by conducting metabolome anal. using UPLC-QTOF-MS. In this study, to investigate the effect of koji starter and sake rice cultivars on the sake metabolites, we performed small-scale sake-making tests using the above 3 rice cultivars and 3 koji starters. Finally, we demonstrated that some of the characteristic components/metabolites of sake from KOS are affected by the koji starter. Thus, in addition to rice cultivar, koji starter plays an important role for establishment/maintenance of the quality of the final product.

Bioscience, Biotechnology, and Biochemistry published new progress about Beverages. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Synthetic Route of 5405-41-4.

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

Guimaraes, Jonas T. published the artcileEffect of high-intensity ultrasound on the nutritional profile and volatile compounds of a prebiotic soursop whey beverage, Recommanded Product: Ethyl 3-hydroxybutanoate, the main research area is prebiotics soursop whey beverage nutritional profile; volatile compound high intensity ultrasound; Anti-hypertensive activity; Bioactive compounds; Emerging technology; Functional food; Non-thermal processing.

This study evaluated the nutritional profile and volatile compounds present in a novel prebiotic (inulin) soursop whey beverage, due to the effects of high-intensity ultrasound (HIUS). The prebiotic soursop whey beverage was produced and processed by non-thermal high-intensity ultrasound varying the power (0, 200, 400 and 600 W) and by high-temperature short time (72 °C for 15 s) thermal treatment. Total acidity, pH, ascorbic acid content, total phenolics compounds content, antioxidant activity, hypertensive activity, fatty acid profile, volatile organic compounds, macro and micro minerals, as well as the heavy metals in these products, were analyzed. Overall, the HIUS technol. induced some pos. changes in the nutritional profile of the soursop whey beverage including beneficial effects, e.g., increase of phenolic content, improvement of the antioxidant and anti-hypertensive activity and reduction of undesired minerals. Although some neg. changes, such as degradation of the ascorbic acid, decrease of some minerals and production of certain volatile compounds were found, the beneficial effects were prominent, thus, opening new opportunities to develop healthy functional beverages.

Ultrasonics Sonochemistry published new progress about Beverages. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Recommanded Product: Ethyl 3-hydroxybutanoate.

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

Coelho, Eduardo published the artcileUnderstanding wine sorption by oak wood: Modeling of wine uptake and characterization of volatile compounds retention, COA of Formula: C6H12O3, the main research area is oak wood wine sorption aging volatile compound retention; Aroma recombination; Mathematical models; Oak wood; Volatile compounds; Wine ageing; Wood sorption.

Cooperage wood is a porous material and beverages exchange compounds with it by penetrating into its pores. This work demonstrates the enrichment of wood with wine during ageing. Three oak varieties were cut into different sized chips and immersed in fortified wine and water. Wine and water uptake were measured along time and sorption was described based on a saturation empirical model. Maximum uptake varied among wood types and was independent of particle size, which affected only equilibrium time. Sorption of wine volatiles such as alcs., esters and acids in wood was shown, which was also dependent on wood type and independent of particle size. Multivariate anal. demonstrated differences and similarities in depletion of wood extractives and sorption of wine volatiles depending on wood variety. Sorption shown in this work demonstrates wood as a vector for aroma recombination, when reused for ageing between different beverages.

Food Research International published new progress about Beverages. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, COA of Formula: C6H12O3.

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

Liu, Yaran published the artcileA high-resolution Orbitrap Mass spectral library for trace volatile compounds in fruit wines, Recommanded Product: Ethyl 3-hydroxybutanoate, the main research area is fruit wine blueberry gojiberry volatile compound odor HRMS library.

The overall aroma is an important factor of the sensory quality of fruit wines, which attributed to hundreds of volatile compounds However, the qual. determination of trace volatile compounds is considered to be very challenging work. GC-Orbitrap-MS with high resolution and high sensitivity provided more possibilities for the determination of volatile compounds, but without the high-resolution mass spectral library. For accuracy of qual. determination in fruit wines by GC-Orbitrap-MS, a high-resolution mass spectral library, including 76 volatile compounds, was developed in this study. Not only the HRMS spectrum but also the exact ion fragment, relative abundance, retention indexes (RI), CAS number, chem. structure diagram, aroma description and aroma threshold (ortho-nasally) were provided and were shown in a database website (Food Flavor Laboratory, http://foodflavorlab.cn/). HRMS library was used to successfully identify the volatile compounds mentioned above in 16 fruit wines (5 blueberry wines, 6 goji berry wines and 5 hawthorn wines). The library was developed as an important basis for further understanding of trace volatile compounds in fruit wines.

Scientific Data published new progress about Blueberry. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Recommanded Product: Ethyl 3-hydroxybutanoate.

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