Tag: M.W=50-100

Kumaresan, R. published the artcileSynthesis and evaluation of N,N-di-alkyl-2-methoxyacetamides for the separation of U(VI) and Pu(IV) from nitric acid medium, Category: ethers-buliding-blocks, the main research area is preparation methoxyacetamide extractant uranium plutonium fuel reporcessing.

The homologs of N,N-di-alkyl-2-methoxyacetamides (DAMeOA) having three different alkyl chains varying from hexyl to decyl (C6, C8 and C10) were synthesized and characterized by NMR and IR spectral analyses. Extraction behavior of U(VI) and Pu(IV) from nitric acid medium in a solution of 0.5 M of DAMeOA in n-dodecane (n-DD) was studied and the results were compared with those obtained using N,N-di-hexyloctanamide (DHOA) in n-dodecane. The effect of various parameters on the distribution ratio of U(VI) and Pu(IV) in DAMeOA was studied. The extraction of nitric acid increased with decrease in chain length of alkyl group attached to amidic nitrogen atom of DAMeOA and the conditional nitric acid extraction constant was determined The extraction of nitric acid in DAMeOA/n-DD resulted in the formation of third phase in organic phase and the third phase occurred early with DAMeOA having smaller alkyl chain length. In contrast to this, the distribution ratio (D) of U(VI) and Pu(IV) in DAMeOA/n-DD increased with increase in the concentration of nitric acid and with increase in the chain length of alkyl group attached to amidic nitrogen atom of DAMeOA. The stoichiometry of the metal – solvate was determined from the slope of extraction data. Quant. recovery of uranium and plutonium from the loaded organic phase was achieved using dilute nitric acid.

Radiochimica Acta published new progress about Extractants. 16332-06-2 belongs to class ethers-buliding-blocks, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Category: ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Mathieu, Didier published the artcilePower Law Expressions for Predicting Lower and Upper Flammability Limit Temperatures, Synthetic Route of 1589-47-5, the publication is Industrial & Engineering Chemistry Research (2013), 52(26), 9317-9322, database is CAplus.

By analogy with recent models for flash point, the lower and upper flammability limit temperatures of organic compounds are represented as power law expressions in terms of fragment contributions. The predictive value of the resulting models compares well with recently published methods. A major advantage of the present approach is the fact it provides better insight into the relations between flammability limit temperatures and mol. structure.

Industrial & Engineering Chemistry Research published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C4H10O2, Synthetic Route of 1589-47-5.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Rovira, Santiago published the artcileAlkaline hydrolysis with high-boiling alcohols, Category: ethers-buliding-blocks, the publication is Annales de Chimie (Paris, France) (1945), 660-700, database is CAplus.

Compounds which are hydrolyzed with difficulty by EtOK or AmOK are saponified by using KOH in PhCH₂OH (I), (CH₂OH)₂ (II), or HOCH(CH₂OH)₂ (III). With nitriles and amides, the liberated NH₃ is titrated at intervals and in this way the kinetics of the reaction is studied. Amides such as AcNH₂, EtCONH₂, PrCONH₂, MeOCH₂CONH₂, BzNH₂, phthalimide, and Bz₃N are quant. saponified when boiled for 1 h. with KOH in I. OC(NH₂)₂ (IV) under these conditions requires 3 h. With II in lieu of I, IV is saponified in 2 h., and with III, in 45 min. OC(NH₂)NHPh and OC(NH₂) NHC₆H₄OEt are saponified in 1-2 h. with KOH in III while OC(NHPh)₂ is not attacked. With Ph-substituted amides, PhNH₂ is formed. Nitriles such as p-MeC₆H₄CN, PhCH₂CN, Ph(CH₂)₃CN, C₁₂H₂₅CN, PhMeCHCN, PhMe₂CCN, PhCH₂CHPhCN, CH₂(OH)CH₂CN, C₅H₁₁OCH₂CN, and amygdalin, when boiled with KOH in I, are quant. saponified in 1 h. while PhCN requires 2 h. PhBuCHCN is 85% saponified in 4 h. and PhBu₂CCN only 11% in 4 h. due to steric hindrance. H₂NCO₂Et and H₂NCO₂CH₂CHMe₂ with KOH in III are quant. saponified in 90 min. Bu, cyclohexyl, and m-xylyl allophanates and KOH in I are not completely saponified but with KOH in III, allophanates are quant. hydrolyzed in 1.5 h. Semicarbazones of the low-mol. ketones and aldehydes are readily saponified in 1-2 h. with KOH in III while the saponification is retarded with the nature of the radical. While Me abietate is saponified with EtOK only 50% in 4 h., it is saponified quant. with KOH in I in 4 h. Saponification of glycerol abietate with 0.5 N EtOK requires 8 h., with 0.1 N PhCH₂OK only 1 h. Carnauba wax is saponified with 0.5 N EtOK in 4 h. and with 0.1 N PhCH₂OK in 1 h. Boiling of caffeine for 1 h. or theobromine with KOH in III for 8 h. liberates 1 mol. NH₃ and 2 mols. NH₂Me. From theophylline 27.4% N is split off as NH₃ and NH₂Me after 25 h. (calculated for 3 N, 23.33%, for 4 N, 31.11%); from uric acid, 26.73% N after 27 h. (calculated for 3 N, 25.0%, for 4 N, 33.33%); and from xanthine, 35.42% N after 71 h. (calculated for 3 N, 27.63%, for 4 N, 36.24%). These results show that the velocity of decomposition depends upon the substituent at the N atoms. Finally, attempts are made to replace halogens in aromatic rings by OH with the preparation of phenols. While the halogen in PhBr, p-C₆H₄Br₂, o-BrC₆H₄Me, 2,3,5-Br₃C₆H₂OH, 2,5,6-bromo-m-xylenol, 2-C₁₀H₇Br, and eosin is almost quant. split off with KOH and I at 250°, the Cl in PhCl and in p-C₆H₄Cl₂ is split off only 10-15% at 250-300°

Annales de Chimie (Paris, France) published new progress about 16332-06-2. 16332-06-2 belongs to ethers-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Ether, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Category: ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Zhang, Miao published the artcileKinetics simulation of propylene epoxidation over different Ti species in TS-1, Application In Synthesis of 1589-47-5, the publication is AIChE Journal (2021), 67(8), e17261, database is CAplus.

A thorough exptl. investigation on the kinetic behavior of liquid-phase propylene epoxidation over TS-1 and tetrapropylammonium hydroxide (TPAOH) treated TS-1 catalysts was conducted in a fixed-bed reactor. The amounts of different coordinated Ti species in the catalysts were quantified by spectroscopies, and their catalytic performances of the epoxidation and alcoholysis of propylene oxide were measured by kinetic modeling. The study shows that the TPAOH treatment converted some of the tetrahedrally coordinated Ti to octahedrally coordinated Ti, and both species were active for the epoxidation and alcoholysis. The superior catalytic performance observed over the TPAOH treated TS-1 is due to two factors, the increased percentage of active sites, and reduced energy barrier for epoxidation on the octahedrally coordinated Ti. In addition, as the H₂O₂ conversion increases, the adsorption equilibrium constant of propylene oxide plays a more decisive role than the activation energy for the selectivity of propylene glycol monomethyl ethers.

AIChE Journal published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C4H8Cl2S2, Application In Synthesis of 1589-47-5.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Wu, Lizhi published the artcileIn-depth understanding of acid catalysis of solvolysis of propene oxide over titanosilicates and titanosilicate/H₂O₂ systems, Recommanded Product: 2-Methoxypropan-1-ol, the publication is Journal of Catalysis (2016), 248-259, database is CAplus.

A comprehensive investigation was carried out to understand the acidic nature of titanosilicates and titanosilicate/H₂O₂ catalytic systems. According to a typical probe reaction, the ring opening of propylene oxide (PO) with CH₃OH and H₂O based on the side reaction in the hydrogen peroxide-propylene oxide (HPPO) process, as well as on the characterization of the IR spectrum, four types of acid sites were confirmed and their alcoholysis ability decreased in the order Ti-OOH > Si-OH groups generated by defect sites ≫ tetrahedral Ti⁴⁺ centers ≈ Ti-OH. The Bronsted acid sites (BAS) of the Si-OH groups generated by defect sites and the Ti-OOH species should be mainly responsible for the ring opening of epoxides. Meanwhile, the alcoholysis products ratio of 1-methoxy-2-propanol (PPM) to 2-methoxy-1-propanol (SPM) was demonstrated to be correlated with the specific acid sites for the first time: BAS tend to generate SPM, while Lewis acid sites (LAS) of tetrahedral Ti⁴⁺ centers tend to form PPM. It is found that the reaction activation energy of alcoholysis is higher than that of hydrolysis, since hydrolysis could proceed directly without acid sites. Fine ion exchange and proper additives were adopted to suppress corresponding specific acid sites, which could obviously enhance the PO selectivity in propylene epoxidation

Journal of Catalysis published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C7H8BFO2, Recommanded Product: 2-Methoxypropan-1-ol.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Xu, Yueting published the artcileHydrogen bonding-catalyzed alcoholysis of propylene oxide at room temperature, Category: ethers-buliding-blocks, the publication is Chemical Communications (Cambridge, United Kingdom) (2021), 57(70), 8734-8737, database is CAplus and MEDLINE.

Alcoholysis of propylene oxide (PO) was achieved over azolate ionic liquids (IL, e.g., 1-hydroxyethyl-3-Me imidazolium imidazolate) at room temperature to access glycol ethers R¹OCH₂CHOHR² [R¹ = Me, Et, iPr, etc.; R² = Me, Et] in high yields with excellent selectivity (e.g., >99%). Mechanism investigation indicated that cooperation of hydrogen-bonding of the anion with methanol and that of the cation with PO catalized the reaction. This catalytic protocol was simple, green, highly efficient and might had promising applications in the production of glycol ethers.

Chemical Communications (Cambridge, United Kingdom) published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C25H23NO4, Category: ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Ou, Jiamin published the artcileSpeciated OVOC and VOC emission inventories and their implications for reactivity-based ozone control strategy in the Pearl River Delta region, China, SDS of cas: 1589-47-5, the publication is Science of the Total Environment (2015), 393-402, database is CAplus and MEDLINE.

Increasing ground-level O₃ concentrations, accompanied by decreasing SO₂, NO₂, PM₁₀, and PM_2.5 concentrations due to recently implemented air pollution control measures, initiated a serious challenge to control volatile organic compound (VOC) emissions in the Pearl River Delta (PRD) region, China. A speciated VOC emission inventory is fundamental to estimate O₃ formation potential (OFP) and identify key reactive VOC species and sources to formulate efficient O₃ control strategies. Using the latest bulk VOC emission inventory and local source profiles, this work developed PRD regional speciated oxygenated VOC (OVOC) and VOC emission inventories to identify key emission-based and OFP-based VOC sources and species. Results showed: Me alc., acetone, and Et acetate were major constituents in OVOC emissions from industrial and household solvents, architectural paints, and biogenic sources; from an emission-based perspective, aromatics, alkanes, OVOC, and alkenes comprised 39.2, 28.2, 15.9, and 10.9% of anthropogenic VOC; from an OFP-based perspective, aromatics and alkenes were predominant with contributions of 59.4 and 25.8% resp.; ethene, m/p-xylene, toluene, 1,2,4-tri-Me benzene, and other high OFP-contributing compounds were key reactive species contributing up to 52% of anthropogenic emissions and up to 80% of OFP; and industrial solvents and processes, gasoline-fueled vehicles and motorcycles were major emission sources of these key reactive species. Policy implications for O₃ control strategy are discussed. An OFP cap was proposed to regulate VOC control policies in the PRD due to its flexibility in reducing overall VOC emission source VOC in practice.

Science of the Total Environment published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C4H10O2, SDS of cas: 1589-47-5.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Chen, Shengxin published the artcileEpoxide ring-opening reaction promoted by ionic liquid reactivity: interplay of experimental and theoretical studies, Recommanded Product: 2-Methoxypropan-1-ol, the publication is Catalysis Science & Technology (2019), 9(20), 5567-5571, database is CAplus.

Ionic liquids (ILs) have been widely introduced recently into the epoxide ring-opening reaction as catalysts or solvent without considering the chem. stability of ILs in propylene oxide (PO). Through a combination of electrospray-ionization quadrupole time-of-flight mass spectrometry (ESI-QTOF-MS) investigations and quantum-chem. calculations, we demonstrate that AC- (acetate) and MC-(Me carbonate) based ILs exhibit modified activity for ring opening of PO compared with the reaction between ILs and epoxide compounds The chem. unstable ILs and the solvent effect can also dominate the catalytic performance of the coupling reaction of PO with methanol. Based on these findings, we further design the reaction process for highly efficient synthesis of propylene glycol Me ether, in which the yield of the main product increased more than 40% under the same ILs catalysts. The results explained how the chem. instability and substrate affected the PO coupling reaction and further controlled it.

Catalysis Science & Technology published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C4H10O2, Recommanded Product: 2-Methoxypropan-1-ol.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Liu, Chun published the artcileLow pressure one-pot synthesis of dimethyl carbonate catalyzed by an alkali carbonate, Safety of 2-Methoxypropan-1-ol, the publication is Cuihua Xuebao (2015), 36(7), 1136-1141, database is CAplus.

A mild and efficient protocol for the alkali carbonate-catalyzed one-pot synthesis of di-Me carbonate (DMC) from epoxide, CO₂ and methanol was developed. The reaction conditions for the one-pot synthesis of DMC were investigated. Under the optimized conditions of initial pressure 0.5 MPa, 120 degree and catalyst loading of 7.5 mol%, 63.5% yield of DMC was achieved using ethylene oxide as the starting material. A mechanism for the catalysis by the alkali carbonate was proposed.

Cuihua Xuebao published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C4H10O2, Safety of 2-Methoxypropan-1-ol.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Bagheri, Mehdi published the artcileMolecular modeling of the standard state heat of formation, SDS of cas: 1589-47-5, the publication is Energy Conversion and Management (2013), 587-596, database is CAplus.

The standard heat of formation is a basic thermophys. property required in determining enthalpies of reaction and in thermodn. stability analyses. Further, the enthalpies of formation are important in investigating bond energies, resonance energies and the nature of chem. bonds. Therefore, the development of accurate structure-based estimation methods for large varieties of chem. species is greatly beneficial in enhancing capability in process and product development. In this work, quant. structure-property relationship (QSPR) models were developed for a structurally diverse DIPPR dataset of standard heats of formation comprising 1765 pure compounds involving 82 chem. classes. We have employed both linear and nonlinear QSPR modeling techniques. The linear approach involves the use of constricted binary particle swarm optimization (BPSO) for feature selection and multiple-linear regression. In the nonlinear approach, the optimum network architecture and its associated inputs are identified using a wrapper-based feature selection algorithm combining differential evolution and artificial neural networks. Model predictions for the root-mean-square error of the BPSO and nonlinear approaches were 138 and 97 kJ/mol, resp.

Energy Conversion and Management published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C4H10O2, SDS of cas: 1589-47-5.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem