Category: 111-87-5

Ling, Xiangyang published the artcileMotion of Particles in a Monolayer Induced by Coalescing of a Bubble with a Planar Air-Water Interface, Application of n-Octanol, the main research area is glass microsphere coalescence bubble gas liquid interface.

The motion of particles in a monolayer induced by the coalescing of a bare bubble with a planar air-water interface was investigated in a modified Langmuir trough. Experiments were performed to understand the effect of particle hydrophobicity, subphase pH, packing d., the presence of a weak surfactant, and particle size distribution on the behavior of particle movement in the monolayer during the coalescence process. Video tracking software was used to track the particles and extract data based on the video footage. Visual inspection indicated that the coalescence of the bubble with the monolayer was a chaotic process which led the interface to oscillate to an extent that the particles underwent complete rearrangement. A simple anal. was carried out on the main forces involved in particle motion and rearrangement at the oscillating air-water interface. The motion characteristic of particles was evaluated by speed and mean-square displacement (MSD). The results showed that the butanol-treated particles had higher speed and MSD than the particles with a stronger affinity to the air-water interface. Similar results were also found at high subphase pH and low packing factor.

Langmuir published new progress about Bubbles. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Application of n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hori, Yohei published the artcileCombined effects of alcohol and electrolyte on mass transfer from single carbon-dioxide bubbles in vertical pipes, COA of Formula: C8H18O, the main research area is alc electrolyte mass transfer carbon dioxide bubble sodium chloride.

Mass transfer rates, kL, of single carbon-dioxide (CO2) bubbles rising through vertical pipes filled with alc.-electrolyte mixed aqueous solutions were measured to investigate the combined effects of alc. and electrolyte on kL. 1-octanol and 1-heptanol, which are known to adsorb to the interface and behave like surfactant, were used. Sodium chloride (NaCl) was used for the electrolyte. The surface tension, σ, decreased with increasing the NaCl concentrations, CN, while keeping the alc. concentration, CA, constant Three combinations of CA and CN having the same values of σ were selected for the exptl. conditions to avoid the effect of σ. The pipe diameters, D, were 12.5 and 18.2 mm. A wide range of bubble diameter covered various bubble shapes, i.e. ellipsoidal, cap, semi-Taylor and Taylor bubbles. The conclusions obtained are as follows: (1) the combination of CA and CN for the same σ does not affect the aspect ratios of ellipsoidal bubbles and the lengths, L, of Taylor bubbles, (2) the Sherwood numbers, Sh, of bubbles in alc.-NaCl mixed aqueous solutions depend on the combination of CA and CN due to the change in the Schmidt number, Sc, even at the same σ for all the tested combinations of concentrations of impurities, and (3) the modified Sherwood number, ShD, of contaminated Taylor bubbles is well correlated in terms of the bubble Reynolds number, Sc, the dimensionless group for surfactant properties and L/dT, where dT is the transition bubble diameter at the transition from the ellipsoidal-cap bubble regime to the transition regime.

International Journal of Heat and Mass Transfer published new progress about Bubbles. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, COA of Formula: C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Camacho Vergara, Edgar L. published the artcileOn the study of the vapor-liquid interface of associating fluids with classical density functional theory, SDS of cas: 111-87-5, the main research area is vapor liquid interface density functional theory.

Classical d. functional theory (DFT) is applied to study the vapor-liquid interface of associating fluids. Our classical DFT implementation uses a Helmholtz free energy functional that reduces to the perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state in the bulk limit. We apply a new association functional, presented in one of our previous works, based on the weighted d. approximation to calculate the interfacial tension of associating fluids and compare them with two of the most used association functionals from literature. It is found that classical DFT with the three association functionals and the current mol. parameters of PC-SAFT is not able to predict satisfactorily the interfacial tension of alkanols. Therefore, the exptl. interfacial tension of alkanols and some associating fluids is included in the determination of the pure mol. parameters of PC-SAFT. With this approach the determination of interfacial tension of pure associating fluids can be greatly improved with the new parameters, but at the expense of slightly higher deviations in the vapor pressure. The new parameters are tested for the determination of vapor-liquid equilibrium (VLE) and the prediction of interfacial tension of binary mixtures containing at least one associating compound Good agreement is found between exptl. data of VLE and interfacial tension of the binary mixtures and the three association functionals. Furthermore, we discuss about the limitations and capabilities of the current classical DFT implementation in the study of the vapor-liquid interface of associating fluids.

Fluid Phase Equilibria published new progress about Density. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, SDS of cas: 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kumar, Anuj published the artcileExtractive separation of levulinic acid using natural and chemical solvents, Name: n-Octanol, the main research area is extractive separation levulinic acid natural chem solvent.

Levulinic acid is an organic compound which has been replacing petroleum products in different sectors such as biofuel and chem. industry. It can be used in the manufacture of plastics, rubber, pharmaceuticals, pesticides, etc. Levulinic acid separation from aqueous streams, different types of solvents such as natural solvents (sunflower and groundnut oil), and various chem. solvents (benzene, iso-butanol, and iso-octanol) at 298.15 K were used. Using equilibrium data various parameters such as: efficiency of extraction, distribution coefficient, dimerization constant, and partition coefficient were calculated and correlated with typical physicochem. properties, mol. weight, d., dipole moment, viscosity, dielec. constant, solubility in water, octanol-water partition coefficient, refractive index, etc. The obtained exptl. extraction results for separation of levulinic acid were compared with various solvents used. The maximum value of distribution coefficient and efficiency of extraction of levulinic acid was obtained for iso-butanol (1.357, 57.276%) and min. value for sunflower oil (0.077, 7.086%) resp.

Chemical Data Collections published new progress about Density. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Name: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Antony, Fiona Mary published the artcileEfficacy of tri-n-octylamine, tri-n-butyl phosphate and di-(2-ethylhexyl) phosphoric acid for reactive separation of protocatechuic acid, Recommanded Product: n-Octanol, the main research area is octylamine butyl ethylhexyl phosphate protocatechuic acid reactive separation.

Owing to its chem. and pharmacol. significances, the efficacy of reactive separation of protocatechuic acid (0.001-0.01 kmol m-3) from aqueous stream by means of tri-n-octylamine (TOA), di-2-ethylhexyl phosphoric acid (D2EHPA) as well as tri-Bu phosphate (TBP) in octanol has been investigated, in terms of extraction efficiency, loading ratio, equilibrium complexation constants, and distribution coefficients Extraction ability was obtained in the order TOA (91.2%) > TBP (88.64%) > D2EHPA (86.43%). In all cases, 1:1 protocatechuic acid:extractant complex is obtained. Further, diffusion coefficients, number of stages for extraction systems, and relative basicity model were used for relating the efficacy.

Separation Science and Technology (Philadelphia, PA, United States) published new progress about Density. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Recommanded Product: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Abraham, Michael H. published the artcileLimiting Diffusion Coefficients for Ions and Nonelectrolytes in Solvents Water, Methanol, Ethanol, Propan-1-ol, Butan-1-ol, Octan-1-ol, Propanone and Acetonitrile at 298 K, Analyzed Using Abraham Descriptors, Name: n-Octanol, the main research area is nonelectrolyte ion solvent diffusion coefficient linear free energy relationship.

We have used literature data on the conductivity of single ions to obtain limiting diffusion coefficients (Do) of ions in water, alcs., propanone and acetonitrile. We then used literature data on limiting diffusion coefficients of nonelectrolytes in order to set up linear free energy relationships that combine data for ions and nonelectrolytes, as log10 (Do) in the same equation, all values being at 298 K. These equations are for solvents water (N = 377, SD = 0.0474), methanol (N = 96, SD = 0.0332), ethanol (N = 96, SD = 0.0666), propan-1-ol (N = 71, SD = 0.0487), butan-1-ol (N = 53, SD = 0.0600), octan-1-ol (N = 61, SD = 0.0684), propanone (N = 86, SD = 0.0366) and acetonitrile (N = 74, SD = 0.0438) where N is the number of data points, that is ions plus nonelectrolytes, and SD is the standard deviation in log10 (Do). It is shown that solute hydrogen bond acidity, solute hydrogen bond basicity and solute volume all lower the diffusion constants of ions and nonelectrolytes in the various solvents studied.

Journal of Solution Chemistry published new progress about Acidity. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Name: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Larina, Olga V. published the artcileSuccessive vapour phase Guerbet condensation of ethanol and 1-butanol over Mg-Al oxide catalysts in a flow reactor, Application of n-Octanol, the main research area is ethanol butanol Guerbet condensation magnesium aluminum oxide hydrotalcite catalyst.

The successive vapor phase condensation of ethanol and 1-butanol (via Guerbet reaction) in a flow reactor under atm. pressure was studied over catalytic Mg-Al oxide compositions Wherein the vapor phase condensation of 1-butanol to 2-ethyl-1-hexanol in flow has been investigated for the first time. The acid/base capacity ratio, which is determined by the Mg/Al ratio, is an important characteristic for the activity and selectivity of Mg-Al oxide catalysts in the abovementioned processes. The carbon chain length of the reacting alcs., an arrangement of surface active sites and other steric factors also have an impact on Guerbet condensation in the vapor phase. High productivity of Mg-Al oxide system to the Guerbet alcs.: 1-butanol – 25 g/(Lcat·h), 2-ethyl-1-hexanol – 19 g/(Lcat·h), has been achieved. The results have shown a prospect of successive conversion realization: (1) ethanol → 1-butanol; (2) 1-butanol → 2-ethyl-1-hexanol for the production of 2-ethyl-1-hexanol from ethanol.

Applied Catalysis, A: General published new progress about Acidity. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Application of n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kim, Young-eun published the artcileProduction of linear α-olefin 1-octene via dehydration of 1-octanol over Al2O3 catalyst, Recommanded Product: n-Octanol, the main research area is alpha olefin alc dehydration octene octanol alumina catalyst.

The linear α-olefin 1-octene was produced via the dehydration of 1-octanol over Al2O3 catalysts. The effect of calcination temperature on the characteristics of an Al2O3 catalyst and its activity in the dehydration of 1-octanol to 1-octene was investigated. Al2O3 catalysts calcined at various temperatures (250, 500, 750, 1000 °C) were evaluated at 300-400 °C with a liquid hourly space velocity (LHSV) of 7-56 h-1. XRD, BET, 27Al-NMR, Py-FTIR, and NH3-TPD analyses indicated that the calcination temperature affected the crystal phase, surface area, occupancy of the coordinated Al3+ ion, and acidic properties of Al2O3 catalysts. Upon calcination at temperatures >750 °C, the surface area of Al2O3 catalysts reduced due to γ-Al2O3 to θ-Al2O3 phase transition. The changes in the crystal phase decreased the surface area, which correlated to the acidity of the Al2O3 catalyst. The distribution of unsaturated Al3+ ions acting as LAS on the catalyst surface increased with increasing calcination temperature, but decreased above 750 °C calcination temperature due to the diminishing surface area. The Al2O3 catalyst calcined at 500 °C showed the highest 1-octanol conversion in the dehydration of 1-octanol. High 1-octene selectivity was maintained while the isomer ratio decreased at a high LHSV of 56 h-1.

Fuel published new progress about Acidity. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Recommanded Product: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kaskow, Iveta published the artcileThe effect of support properties on n-octanol oxidation performed on gold – silver catalysts supported on MgO, ZnO and Nb2O5, Quality Control of 111-87-5, the main research area is metal oxide supported gold silver catalyst preparation octanol oxidation.

Catalytic behavior of supported nanometal catalysts for alcs. selective oxidation depends on the nature of the support and its surface. To identify the main feature that could explain these effects, supported mono- (Au) and bimetallic (AuAg) catalysts were prepared by using pure MgO, ZnO and Nb2O5, representative of three different types of oxides (basic, amphoteric and acidic, resp.), to get homogeneous metal-support interaction for each catalyst. The catalysts were characterized by XRD, N2 physisorption, TEM, UV-vis, XPS and 2-propanol decomposition as test reaction. It was found that the catalytic activity is influenced by the electron mobility between the gold nanoparticles and the support, which in turns depends on the intermediate electronegativity of the support. Selectivity in n-octanol oxidation was determined by redox properties of the gold species, the acid-base properties of the supports and the catalyst pretreatment. Silver addition modified the acid-base properties of the catalytic system, thus influencing the selectivity in n-octanol oxidation Pretreatment of the catalyst (drying in air or thermal treatment in hydrogen flow) had a significant impact on its activity and selectivity.

Molecular Catalysis published new progress about Acidity. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Quality Control of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Pavlovic, J. published the artcileCatalytic activity of SnO2- and SO4/SnO2-containing clinoptilolite in the esterification of levulinic acid, Formula: C8H18O, the main research area is catalytic SnO2 SO4 clinoptilolite esterification levulinate Zeolitic tuff.

Catalysts based on natural zeolite – clinoptilolite loaded with either SnO2 (TOHCLI) or sulfated SnO2 (STOHCLI) were prepared and tested in the esterification of levulinic acid (LA) with octanol or ethanol. The Sn content in TOHCLI and STOHCLI varied from 4.5 to 12.3 weight%. The catalysts were characterized by powder X-ray diffraction method, SEM coupled with energy dispersive X-ray spectroscopy, thermal anal., XPS, N2 physisorption at -196 °C, 27Al and 29Si MAS NMR solid state spectroscopy and FTIR spectroscopy for anal. of acidic centers. A high conversion rate of LA into octyl- (OLA) or Et levulinate (ELA) was obtained for both TOHCLI and STOHCLI. TOHCLI showed a high activity in the conversion of LA into OLA (55%) and a moderate activity in the conversion to ELA (22%). STOHCLI led to a total conversion of LA to OLA and ELA due to the presence of a high amount of Bronsted and Lewis acid sites in the catalysts. The catalytic activity decreased to 86% for OLA and to 66% for ELA after next five cycles. Lower catalytic activity in the repeated cycles during ELA formation was explained by pore blockage due to coke formation.

Microporous and Mesoporous Materials published new progress about Acidity. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Formula: C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts