Category: 931-40-8

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Molecular Catalysis called Tuneable transesterification of glycerol with dimethyl carbonate for synthesis of glycerol carbonate and glycidol on MnO2 nanorods and efficacy of different polymorphs, Author is Deshmukh, Gunjan P.; Yadav, Ganapati D., which mentions a compound: 931-40-8, SMILESS is O=C1OCC(CO)O1, Molecular C4H6O4, Reference of 4-(Hydroxymethyl)-1,3-dioxolan-2-one.

Bioglycerol must be valorized to make biodiesel competitive vis-a-vis petro-diesel price. Glycerol carbonate is a sustainable chem. used by many industries. Various routes are reported but there exists a scope to develop better catalytic routes for selective synthesis of glycerol carbonate. Different polymorphs of MnO2 were explored as catalyst for the first time in the synthesis of glycerol carbonate by transesterification of glycerol with di-Me carbonate under solvent-free conditions. The effect of microwave condition vs. conventional heating was compared vis-a-vis conversion of glycerol, selectivity of glycerol carbonate and glycidol. Microwave heating (80°C) was advantageous over conventional heating (120°C). Different mesoporous polymorphs of MnO2 were prepared by hydrothermal synthesis and the activity of each polymorph was screened for transesterification reaction of glycerol. All MnO2 polymorphs were completely characterized. δ-MnO2 was the most active, selective, robust and recyclable catalyst. A kinetic model was developed. The overall process is green and sustainable.

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Recommanded Product: 931-40-8. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 4-(Hydroxymethyl)-1,3-dioxolan-2-one, is researched, Molecular C4H6O4, CAS is 931-40-8, about Assessing the pKa-Dependent Activity of Hydroxyl Hydrogen Bond Donors in the Organocatalyzed Cycloaddition of Carbon Dioxide to Epoxides: Experimental and Theoretical Study. Author is Yingcharoen, Prapussorn; Kongtes, Chutima; Arayachukiat, Sunatda; Suvarnapunya, Kittipong; Vummaleti, Sai V. C.; Wannakao, Sippakorn; Cavallo, Luigi; Poater, Albert; D’ Elia, Valerio.

The development of hydrogen bond donors (HBDs) as catalytic moieties in the cycloaddition of carbon dioxide to epoxides is an active field of research to access efficient, inexpensive and sustainable metal-free systems for the conversion of carbon dioxide to useful chems. Thus far, no systematic attempt to correlate the activity of a diverse selection of HBDs to their physico-chem. properties has been undertaken. In this work, we investigate factors influencing the catalytic activity of hydroxyl HBDs from different chem. families under ambient conditions by considering the HBDs Bronsted acidity (expressed as pKa), the number of hydroxyls and structural aspects. As an effect, this study highlights the crucial role of the hydroxyl protons’ Bronsted acidity in determining the catalytic activity of the HBDs, identifies an ideal range for the hydroxyl HBDs proton acidity (9 Recommanded Product: 931-40-8 can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.

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Teng, Wai Keng; Yusoff, Rozita; Aroua, Mohamed Kheireddine; Ngoh, Gek Cheng published an article about the compound: 4-(Hydroxymethyl)-1,3-dioxolan-2-one( cas:931-40-8,SMILESS:O=C1OCC(CO)O1 ).HPLC of Formula: 931-40-8. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:931-40-8) through the article.

The production of glycerol carbonate (GC) from industrial grade crude glycerol was catalyzed by calcium oxide (CaO) via microwave assisted transesterification (MAT). Influencing process parameters including reaction temperature, time and molar ratio of di-Me carbonate/glycerol (DMC/Gly) were examined and optimized by applying Box Behnken Design (BBD). The reaction was modeled into a reduced cubic model with good predictive accuracy. A high GC yield of 99.5% was achieved with 1 wt% CaO at optimized conditions such as reaction temperature of 65°C, reaction time of 3 min and DMC/Gly molar ratio of 2.5. The study performed on the reaction kinetics suggests that the reaction follows an irreversible second order rate equation. A relatively low activation energy of 4.53 kJ mol-1 was determined for the microwave assisted transesterification of crude glycerol for the production of GC. The values of rate constants between 45°C to 65°C were in the range of 0.023-0.026 L mol-1 min-1, which are of one magnitude order higher than that of the conventional heating.

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Synthetic Route of C4H6O4. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 4-(Hydroxymethyl)-1,3-dioxolan-2-one, is researched, Molecular C4H6O4, CAS is 931-40-8, about Sustainable process for synthesis of value-added products using glycerol as useful raw material. Author is Kim, Young Chul; Moon, Dong Ju.

A review. The growth of the production of biodiesel has led to an overproduction of crude glycerol as a byproduct. In order to secure the competitiveness of the biodiesel industry, the utilization of crude glycerol is emerging as a new and challenging research field. This review paper summarizes the glycerol conversion technol. published by our laboratory for the production of value-added chems., in four categories: (1) glycerol steam reforming for hydrogen production; (2) glycerol hydrogenolysis into 1, 2-propanediol; (3) glycerol dehydration for acrolein production; and (4) glycerolysis of urea for glycerol carbonate production We consider that the suggested catalysts are desirable candidates for the production of each chem. from glycerol. Further studies of the demonstration of pilot plant and process optimization are needed for com. applications.

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Lee, Ching Shya; Aroua, Mohamed Kheireddine; Daud, Wan Ashri Wan; Cognet, Patrick; Peres, Yolande; Ajeel, Mohammed A. published the article 《Selective electrochemical conversion of glycerol to glycolic acid and lactic acid on a mixed carbon-black activated carbon electrode in a single compartment electrochemical cell》. Keywords: glycerol glycolic lactic acid electrochem conversion carbon electrode; electro-oxidation; electro-reduction; glycerol; glycolic acid; lactic acid.They researched the compound: 4-(Hydroxymethyl)-1,3-dioxolan-2-one( cas:931-40-8 ).Recommanded Product: 931-40-8. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:931-40-8) here.

In recent years, the rapid swift increase in world biodiesel production has caused an oversupply of its byproduct, glycerol. Therefore, extensive research is done worldwide to convert glycerol into numerous high added-value chems. i.e., glyceric acid, 1,2-propanediol, acrolein, glycerol carbonate, dihydroxyacetone, etc. Hydroxyl acids, glycolic acid and lactic acid, which comprise of carboxyl and alc. functional groups, are the focus of this study. They are chems. that are commonly found in the cosmetic industry as an antioxidant or exfoliator and a chem. source of emulsifier in the food industry, resp. The aim of this study is to selectively convert glycerol into these acids in a single compartment electrochem. cell. For the first time, electrochem. conversion was performed on the mixed carbon-black activated carbon composite (CBAC) with Amberlyst-15 as acid catalyst. To the best of our knowledge, conversion of glycerol to glycolic and lactic acids via electrochem. studies using this electrode has not been reported yet. Two operating parameters i.e., catalyst dosage (6.4-12.8% w/v) and reaction temperature [room temperature (300 K) to 353 K] were tested. At 353 K, the selectivity of glycolic acid can reach up to 72% (with a yield of 66%), using 9.6% w/v catalyst. Under the same temperature, lactic acid achieved its highest selectivity (20.7%) and yield (18.6%) at low catalyst dosage, 6.4% w/v.

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Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, International Journal of Polymer Science called Using diaper waste to prepare magnetic catalyst for synthesis of glycerol carbonate, Author is Wang, Jincan; Liang, Yong; Wang, Song; Okoye, Patrick U.; Chen, Hongxu; Zhou, Yue; Xu, Jiening; Meng, Zhenhao; Wang, Lei; Li, Sanxi, which mentions a compound: 931-40-8, SMILESS is O=C1OCC(CO)O1, Molecular C4H6O4, SDS of cas: 931-40-8.

Diaper waste was calcined above 400°C after impregnated in the solution of nickel nitrate. The as-prepared diaper waste-derived materials were used as magnetic catalysts for the synthesis of glycerol carbonate (GC). Structure and catalytic ability investigations on the catalysts calcined at different temperatures indicated that calcination temperature was an important factor affecting the property of catalysts. It was found that the catalyst obtained at the calcination temperature of 700°C (named DW-Ni-700) showed the best performance. When DW-Ni-700 was used in the synthesis of GC, GC yield reached 93.2%, and the magnetic property of DW-Ni-700 facilitated the catalyst separation process. Meanwhile, DW-Ni-700 showed high reusability in the reaction. After four times reuse of DW-Ni-700, GC yield decreased less than 4%.

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Chiral Catalysts,
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Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 4-(Hydroxymethyl)-1,3-dioxolan-2-one, is researched, Molecular C4H6O4, CAS is 931-40-8, about Crystalline LaCoO3 perovskite as a novel catalyst for glycerol transesterification.SDS of cas: 931-40-8.

LaCoO3 perovskite was synthesized using sol-gel method by nitrate and acetate precursors of La and Co with varying molar ratios of La and Co (1:1, 1:2 and 2:1). This was found to be an unique strategy to obtain highly crystalline LaCoO3 perovskite material without using any chelating agent. The variation of precursors was found to influence their crystallinity however, variation in molar ratio in the range of 0.5-2, did not affect the formation of perovskite framework. The formation of pure perovskite phase (around or >80%) could be achieved by combination of acetate and nitrate precursors while, the combination of acetate- acetate or nitrate- nitrate precursors resulted in low phase purity for the perovskite due to the formation of secondary phases like La2O3 and Co3O4. Very interestingly, such combination of perovskite and pure oxide phases contributed to enhancement of basic sites which catalyzed the glycerol transesterification with DMC (di-Me carbonate) to GC (glycerol carbonate) and GD (glycidol). Among all the catalysts studied, NAP-2 showed highest efficiency in terms of 98% glycerol conversion and 77% GC and 22% GD selectivities. The highlight of this work is that first step glycerol transesterification with DMC required basic sites of either metal oxide or perovskite but for cascade reaction involving decarboxylation required both metal oxide as well as LaCoO3 perovskite phase.

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Recommanded Product: 931-40-8. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 4-(Hydroxymethyl)-1,3-dioxolan-2-one, is researched, Molecular C4H6O4, CAS is 931-40-8, about Microwave-assisted synthesis of glycerol carbonate by the transesterification of glycerol with dimethyl carbonate using Musa acuminata peel ash catalyst. Author is Changmai, Bishwajit; Laskar, Ikbal B.; Rokhum, Lalthazuala.

Musa acuminata peel ash (MAPA), a biowaste-derived solid base catalyst is investigated for the transesterification of glycerol with di-Me carbonate (DMC) to glycerol carbonate (GC), a potential fuel additive, under microwave irradiation High basicity, high surface area and mesoporous nature of the catalyst effectively promote the conversion of glycerol to GC. Moreover, the catalyst being a biowaste is abundantly available, cheap, biodegradable, renewable, sustainable and environment-friendly. Microwave irradiation shows higher conversion (99%) and greater selectivity (99.5%) as compared to conventional heating (18% conversion and 98.5% selectivity) under our optimized reaction conditions such as 1:2 molar ratio of glycerol/dimethyl carbonate, catalyst loading of 6 wt%, temperature of 75°C and time of 15 min. The synthesized GC was characterized by gas chromatog., 1H and 13C NMR, and mass spectrometry. The reusability of the catalyst was investigated up to 6 successive cycles and it shows great stability toward the transesterification of glycerol to GC.

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Category: chiral-catalyst. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 4-(Hydroxymethyl)-1,3-dioxolan-2-one, is researched, Molecular C4H6O4, CAS is 931-40-8, about Influence of biochar composition and source material on catalytic performance: the carboxylation of glycerol with CO2 as a case study. Author is Collett, Catherine; Masek, Ondrej; Razali, Nurul; McGregor, James.

The impact of the chem. and phys. composition of biochar catalysts is demonstrated in the carboxylation of glycerol with carbon dioxide for the first time, using acetonitrile as a dehydrating agent. Biochars are an important emerging class of catalytic material that can readily be produced from low-value biomass residues; however, the impact of feedstock choice is often overlooked. The ash content of biochar from three different feedstocks is shown to be catalytically active for the production of glycerol carbonate and triacetin, while low-ash catalysts such as soft wood biochar and com. activated charcoal are inactive. Following treatment with hydrochloric acid, yields of glycerol carbonate over ash were reduced by over 94%, and triacetin was no longer produced. This has been attributed to the loss of potassium content. Carbon content was shown to be catalytically active for the synthesis of diacetin, and graphitic carbon may be beneficial. Through the development of structure-performance relationships, biomass feedstocks with the most suitable properties can therefore be selected to produce biochars for specific catalytic applications. This would expand the range of reactions which can be effectively catalyzed by these materials and enhance the development of a more circular and sustainable chems. industry.

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In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Optimizing the Surface Properties of MgO Nanoparticles Towards the Transesterification of Glycerol to Glycerol Carbonate, published in 2019, which mentions a compound: 931-40-8, Name is 4-(Hydroxymethyl)-1,3-dioxolan-2-one, Molecular C4H6O4, Synthetic Route of C4H6O4.

MgO nanoparticles (NPs) were successfully fabricated by a facile, inexpensive and green synthesis protocol using soluble starch as a green bio-template. The influence of calcination temperature on its textural properties and catalytic efficiency has been investigated in detail. The enhancement of MgO NPs crystallinity by increasing the calcination temperature is found from X-ray diffraction and Transmission electron microscopy analyzes. N2-sorption studies and CO2-temperature program desorption (TPD) measurements revealed that the MgO NPs calcined at 500 °C have superior textural properties and strong surface basicity. XPS anal. conferred that the MgO-500 NPs furnished the optimized surface Lewis sites, consequently outperforms better transesterification activity. The fabricated MgO-500 NPs exhibited an excellent catalytic activity toward the efficient conversion of glycerol to glycerol carbonate (GC) with more than 93% selectivity. The intelligibility of the adopted synthesis is eco-benign and wide utility as a solid base catalyst for several organic transformations.

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