Category: 2016-56-0

Filippov, L. O. published the artcileMechanism of starch adsorption on Fe-Mg-Al-bearing amphiboles, Synthetic Route of 2016-56-0, the publication is International Journal of Mineral Processing (2013), 120-128, database is CAplus.

The specific affinity of iron minerals for starch has been successfully exploited in the selective flocculation and flotation of iron ores. The same phenomenon complicates the flotation separation between iron oxides, i.e., magnetite and Fe-Mg-Al-bearing silicates. Adsorption isotherms were constructed, and the mechanisms of the adsorption of starch on quartz, magnetite and Fe-Mg-Al-bearing amphibole pargasite were discussed in this paper. The nature of the species adsorbed on minerals was determined by DRIFT and XPS spectroscopy. The flotation behavior of magnetite and silicates at pH 10 upon stirring in a starch solution was demonstrated. The adsorption and DRIFT study results concluded that starch is adsorbed both on quartz and amphiboles. However, the starch adsorption mechanism based on the chem. complexation is proposed to explain the strong depression effect of the starch during the magnetite and Fe-Mg-Al-bearing amphibole flotation with an amine compared with quartz.

International Journal of Mineral Processing published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Synthetic Route of 2016-56-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Babchin, Alexander J. published the artcileOsmotic repulsion force due to adsorbed surfactants, Name: Dodecylamineacetate, the publication is Colloids and Surfaces, B: Biointerfaces (2012), 137-143, database is CAplus and MEDLINE.

When considering interaction forces in surfactant-stabilized colloidal dispersions a factor that has been rarely discussed is the possible effect of osmotic force due to overlapping adsorbed surfactant monolayers. In the present work, the osmotic repulsion force is built-in on the basis of DLVO mechanics and based on Fischer’s consideration of the analogous situation for adsorbed polymer layers on solid surfaces and on Langmuir’s earlier concept of osmotic pressure excess due to overlapping adsorption layers. The advanced method for calculation of the net repulsion force in overlapping surfactant monolayers is developed and applied to real adsorbed surfactant systems. We show that the value of disjoining pressure can reach values as high as 8 MPa for the condition of fully overlapping surfactant adsorption layers, based on the calculation of the first virial term of the general expression for osmotic pressure. Thus, we have shown that osmotic forces can be substantial at distances of close interfacial approach, and that they can easily be of the same or greater order of magnitude than the forces that have been more conventionally considered.

Colloids and Surfaces, B: Biointerfaces published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Name: Dodecylamineacetate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Herrmann, U. published the artcileAggregation of alkylammonium carboxylates and aerosol-OT in apolar solvents studied using absorption and fluorescence probes, Computed Properties of 2016-56-0, the publication is Journal of the American Chemical Society (1979), 101(10), 2665-9, database is CAplus.

By using optical probes, the aggregation of 16 alkylammonium (C₁₀ to C₁₄) carboxylates (C₂ to C₁₁) was studied in dry C₆H₆, C₆H₁₂, and CCl₄, and of as Aerosol-OT in C₆H₆. At the very low concentrations of the absorption (Acridine Orange and iodinee) and fluorescence probes used (octyl-, dodecyl-, and tetradecylammonium 8-anilino-1-naphthalenesulfonates), only the I probe has a significant effect on the aggregation of the surfactant. Critical micelle concentrations were determined by the Corrin-Harkins method, and in a few cases aggregation numbers and association constants were calculated by Adams’ method by using vapor pressure osmometric results. For the alkylamonium carboxylkates the onset of aggregation is gradual, leading to small aggregates (average aggregation number n? = 3) with the monomer population and n? dependent on the concentration In these systems the concept of critical micelle concentration is used only in a operational sense. For Aerosol-OT the onset of micelle formation is sharper, leading to larger aggregates (n? = 10) with the monomer pouplation and aggregation number independent of the concentration The effects of the solvent, the nature of the probe, and the length of the alkylammonium and counterion chains on the aggregation tendency are discussed.

Journal of the American Chemical Society published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Computed Properties of 2016-56-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Hasebe, Shigeru published the artcileRemoval of lead(2+) ion by absorbing particle flotation using zeolite, Name: Dodecylamineacetate, the publication is Iwate Daigaku Kogakubu Kenkyu Hokoku (1983), 53-9, database is CAplus.

The flotation of zeolite with dodecylamine?acetate (DAA) [2016-56-0] for the removal of Pb²⁺ was investigated. Zeolite particle can be effectively floated with DAA at pH 2-7. The suitable size of zeolite for flotation with a column type separator is 104-137¦Ì, and the recovery of zeolite is ?95% with DAA 15 kg/ton. Under the same conditions, the column flotation showed a higher recovery of zeolite and removal of Pb²⁺ than did the Denver type flotation equipment. The zeolite may be used for 3 cycles to remove Pb²⁺. Adsorbing particle flotation in the column can be treated with a higher concentration and for a shorter time than with the percolation method.

Iwate Daigaku Kogakubu Kenkyu Hokoku published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Name: Dodecylamineacetate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Usui, Shinnosuke published the artcileThe effect of grade of quartz on the cationic flotation of quartz from hematite, Recommanded Product: Dodecylamineacetate, the publication is Tohoku Daigaku Senko Seiren Kenkyusho Iho (1980), 36(1), 17-22, database is CAplus.

Flotation experiments were carried out with quartz [14808-60-7] and hematite [1317-60-8] (44-53 ¦Ì), sep. and mixed, using a Denver-type laboratory floatator, at various values of pH and collector (dodecyl ammonium acetate DAA [2016-56-0]) concentration, with special reference to the effect of the grade of quartz on the reverse flotation of quartz. The individual flotation indicated that complete flotation of quartz was obtained at a DAA concentration of (5 ¡Á 10^-5)-(1 ¡Á 10^-4)M (0.25-0.5 kg/ton) and at pH 5-5.4, midpoint of isoelec. points of resp. minerals, while no flotation of hematite took place under corresponding conditions. In the flotation of the mixed sample an incomplete separation was obtained under the same conditions; the floatability of quartz decreased while that of hematite increased. The floatability of quartz decreased with decrease in grade, indicating that the reverse flotation of low-grade quartz from hematite becomes difficult. The poor separation of quartz described above was improved considerably by the addition of 1 ¡Á 10^-4M sodium gluconate [527-07-1].

Tohoku Daigaku Senko Seiren Kenkyusho Iho published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H10O4, Recommanded Product: Dodecylamineacetate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Otsuki, Akira published the artcileObservation of aggregate structure of green and blue fluorescent powders suspended in heptane by interactive force measurement, Safety of Dodecylamineacetate, the publication is International Journal of the Society of Materials Engineering for Resources (2006), 13(2), 86-91, database is CAplus.

Three kinds of fluorescent powders were separated by means of organic liquid-liquid extraction for the recycling purpose. The effect of surfactant concentration on the separation of the fluorescent powders was observed In this study, the effect was analyzed by observing aggregate structure of the green and blue fluorescent powders using an exptl. apparatus, which measured the interactive force between two surfaces of glass hemisphere and flat plate under elec. field. The maximum distance between two surfaces is 20 ¦Ìm. The size of aggregates and adsorption state of green and blue fluorescent powders in heptane containing a certain amount of surfactant was measured. This method would be very useful for measuring the size of aggregate and the adsorption state of ultra fine particles dispersed in solution

International Journal of the Society of Materials Engineering for Resources published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Safety of Dodecylamineacetate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Chernyshova, I. V. published the artcileMechanism of Adsorption of Long-Chain Alkylamines on Silicates. A Spectroscopic Study. 1. Quartz, Computed Properties of 2016-56-0, the publication is Langmuir (2000), 16(21), 8071-8084, database is CAplus.

The mechanism of adsorption of long-chain alkylamines at pH 6-7 onto quartz was studied using FTIR and XPS spectroscopy. The spectroscopic data were correlated with ¦Æ potential and Hallimond flotation results. For the 1st time (1) amine cation in the 1st monolayer is H-bonded with surface silanol group and this H-bond becomes stronger after the break in the adsorption characteristics (isotherm, ¦Æ potential, floatability); (2) at the break the origin of the adsorbed amine species changes qual., and along with alkylammonium ion attached to deprotonated silanol group, mol. amine appears at the surface and, as a result, monolayer thick patches of well-oriented and densely packed adsorbed amine species form rendering the surface highly hydrophobic; and (3) at higher amine concentration, bulk precipitation of mol. amine takes place. The counterion influences both these steps. A model of successive two-dimensional and three-dimensional precipitation was suggested to explain amine adsorption on a silicate surface.

Langmuir published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Computed Properties of 2016-56-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Chernyshova, I. V. published the artcileMechanism of adsorption of long-chain alkylamines on silicates: A spectroscopic study. 2. Albite, SDS of cas: 2016-56-0, the publication is Langmuir (2001), 17(3), 775-785, database is CAplus.

Using FTIR (DRIFTS and IRRAS) and XPS spectroscopy, ¦Æ potential measurements, and Hallimond flotation tests, it was confirmed that long-chain primary amines are adsorbed on silicates at pH 6-7 through the 2D-3D precipitation mechanism. The orientation and packing of dodecyl- and hexadecylammonium acetate and chloride adsorbed on albite in the different regions of the adsorption isotherm were determined These characteristics depend strongly on the substrate. Coadsorption of the counterion was not revealed, but the counterion was found to affect indirectly the adsorption at concentrations above the concentration of the bulk amine precipitation

Langmuir published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, SDS of cas: 2016-56-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Vidyadhar, A. published the artcileMechanisms of amine-feldspar interaction in the absence and presence of alcohols studied by spectroscopic methods, Application In Synthesis of 2016-56-0, the publication is Colloids and Surfaces, A: Physicochemical and Engineering Aspects (2003), 214(1-3), 127-142, database is CAplus.

The adsorption of long-chain primary amines on feldspars at neutral pH 6-7 was investigated using Hallimond flotation, zeta-potential, FT-IR and XPS studies. Two-dimensional (2D) followed by three-dimensional (3D) precipitation mechanism of amine adsorption on quartz reported earlier (Langmuir 16 (2000) 8071) was further substantiated. The orientation and packing of dodecyl- and hexadecylammonium acetate and chloride adsorbed on albite in the different regions of the adsorption isotherm were determined It was shown that these characteristics depend strongly on the substrate. The influence of long-chain alcs. on the adsorption of amines in mixed amine/alc. on feldspars, i.e. albite (NaAlSi₃O₈) and microcline (KAlSi₃O₈), was also examined Coadsorption of the counterion was not revealed, but the counterion was found to affect indirectly the adsorption at concentrations above the concentration of the bulk amine precipitation It was proved spectroscopically that co-adsorption of long-chain alcs. along with amine cations leads to formation of a closed packed surface layer as compared to the case of adsorption of pure amine alone at the same concentration The highest order and packing at the surface were observed when the alkyl chain length of mixed amine and alc. were the same. The condition of same chain length of amines and alcs. adsorbing at the surface corresponded to maximum flotation recovery. The results also confirmed the synergistic enhancement of amine adsorption in the presence of alcs. A mechanism of mixed long-chain amine and alc. adsorption onto silicates (albite and quartz) consistent with the primary adsorption species of alkylammonium-water-alc. complex, where deprotonation of ammonium groups in the adsorbed layer leading to 2D precipitation of mol. amine was illustrated.

Colloids and Surfaces, A: Physicochemical and Engineering Aspects published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C12H15ClO3, Application In Synthesis of 2016-56-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Vidyadhar, A. published the artcileMechanisms of Amine-Quartz Interaction in the Absence and Presence of Alcohols Studied by Spectroscopic Methods, Recommanded Product: Dodecylamineacetate, the publication is Journal of Colloid and Interface Science (2002), 256(1), 59-72, database is CAplus.

The adsorption mechanism of long-chain alkylamines and their acetate salts on quartz was investigated using Hallimond flotation, zeta-potential, Fourier transform IR, and XPS studies at neutral pH 6-7. The influence of long-chain alcs. on the adsorption of amines in mixed amine-alc. on quartz was also examined It is shown by IR spectroscopy that in differentiation to the electrostatic adsorption model of Gaudin-Fuerstenau-Somasundaran, amine cations form strong hydrogen bonds with the surface silanol groups. The XPS spectra revealed the presence of neutral amine mols. together with protonated ammonium ions at and above the critical hemimicelle concentration The acetate counterions were found to influence the amine adsorption. Possible mechanisms of adsorption based on these observations were discussed. For the first time it was proved spectroscopically that coadsorption of long-chain alcs. along with amine cations leads to formation of a closely packed surface layer, as compared to the case of adsorption of pure amine alone at the same concentration The highest order and packing at the surface are observed when the alkyl chain length of mixed amine and alc. are the same. The condition of same chain length of amines and alcs. adsorbing at the surface corresponds to maximum flotation recovery. The results also confirmed the synergistic enhancement of amine adsorption in the presence of alcs. The mechanism for mixed long-chain amine and alc. adsorption onto quartz is consistent with the primary adsorption species of alkylammonium-water-alc. complex, where deprotonation of ammonium groups in the adsorbed layer leading to two-dimensional precipitation of mol. amine was illustrated.

Journal of Colloid and Interface Science published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C44H28ClFeN4, Recommanded Product: Dodecylamineacetate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia