Category: 2016-56-0

De Wet, J. R. published the artcileThe influence of cyanide on the flotation of pyrite from Witwatersrand gold leach residues, Recommanded Product: Dodecylamineacetate, the publication is Minerals Engineering (1995), 8(11), 1333-45, database is CAplus.

A significant portion of the gold in Witwatersrand ores may occur in the pyritic fraction, which seldom comprises >4% of the ore. Consequently, pyrite recovery through flotation offers an opportunity to increase gold recovery through further treatment of the concentrate The traditional processing routes are no longer economically viable due to the high cost of acid treatment to overcome the depressing influence of cyanide on xanthate flotation. Amines were identified as possible alternative collectors for pyrite flotation in the presence of cyanide. The influence of cyanide on pyrite flotation with dodecylamine acetate (I) was investigated by using electrochem. impedance measurements, flotation tests, and in-situ Raman spectroscopy. Cyanide acted as a slight depressant or no depressant at all for the flotation of pyrite with I, a much smaller effect than that which cyanide has on pyrite flotation with xanthate. In pH 11 solutions, pyrite electrodes exhibited a lower interfacial capacitance in the presence of I and reflect the formation of a layer on the electrode surface by adsorption of the cationic amine collector on the pyrite surface. At cyanide concentrations typical of gold leaching, this capacitance decrease is not observed and probably reflects an inhibiting effect of cyanide on amine adsorption. Raman spectroscopy measurements demonstrated a strong pH effect on amine adsorption and little effect of cyanide in broad agreement with flotation tests and electrochem. impedance measurements.

Minerals Engineering 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, Recommanded Product: Dodecylamineacetate.

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

Rudolph, Martin published the artcileSpecific surface free energy component distributions and flotabilities of mineral microparticles in flotation-An inverse gas chromatography study, Category: catalysis-chemistry, the publication is Colloids and Surfaces, A: Physicochemical and Engineering Aspects (2017), 380-388, database is CAplus.

In fundamental flotation studies often the contact angle with water is used to describe wettability of a mineral surface and it is correlated with flotability. A more fundamental parameter however is the sp. surface free energy related to the contact angle via Young’s equation. Inverse gas chromatog. (iGC) has recently been proven to be a suitable method to determine sp. surface free energy components and their distributions of particulate surfaces. In this study the pure minerals quartz (SiO₂), fluoro-apatite (Ca₅[F,(PO4)₃]), and magnetite (Fe₃O₄) are examined for flotabilities and surface energy component distributions considering different methods of sample treatment and the effect of the collectors sodium oleate and dodecyl ammonium acetate. The parameter of specific net free energy of interaction between bubbles and particles immersed in water ¦¤G_pwb resulting from the complex surface energy analyses is introduced and used to evaluate the hydrophobicity of the mineral surface in correlation to microflotation recoveries. The results lead to the hypothesis that only small fractions of the surface and their change of wettability by flotation reagent adsorption will inherently define the flotability of minerals. Consequently, the main purpose of the amphiphilic collector mols. seems to be the reduction of high sp. surface free energies of small fractions of the surface that lead to a strong attraction between particle surface sites and water mols. rather than the hydrophobization of the entire mineral surface, a new paradigm in flotation science.

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 C14H31NO2, Category: catalysis-chemistry.

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

Dodbiba, G. published the artcileCombination of sink-float separation and flotation technique for purification of shredded PET-bottle from PE or PP flakes, COA of Formula: C14H31NO2, the publication is International Journal of Mineral Processing (2002), 65(1), 11-29, database is CAplus.

In this contribution, the separation of poly(ethylene terephthalate) (PET)-polyethylene (PE) and PET-polypropylene (PP) mixtures was studied in order to improve the grade of the raw input used in PET bottle recycling. First, PET bottles and their caps (made of PE or PP) were shredded and the floatability of each polymer was tested. Even with the addition of the wetting reagents, dodecylamine acetate (DAA) or poly(vinyl alc.) (PVA), the results did not suggest that the required 99.995% purity of PET plastic could not be achieved by flotation. Second, the mixtures were separated with a sink-float process using a drum separator. Finally, as the required purity of PET could not be obtained by either technique alone, a system utilizing a combination of the two processes was developed. This system easily achieved the desired PET grade. At last, some sink-float experiments were performed with a medium of magnesium sulfate (dense medium separation).

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, COA of Formula: C14H31NO2.

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

Ackerman, P. K. published the artcileEvaluation of flotation collectors for copper sulfides and pyrite. II. Non-sulfhydryl collectors, Application In Synthesis of 2016-56-0, the publication is International Journal of Mineral Processing (1987), 21(1-2), 129-40, database is CAplus.

Flotation of chalcopyrite and chalcocite with colloidal electrolyte collectors (Na laurate, Na oleate, Na dodecyl sulfate, and dodecylamine acetate) and chelate-forming compound (glyoxalidine) at pH 5-10.5 is a more complicated process than was previously supposed. Glyoxalidine is superior to the other collectors and at a lower concentration

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, Application In Synthesis of 2016-56-0.

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

Karlsson, S. published the artcilePhase Behavior and Characterization of the System Acetic Acid-Dodecylamine-Water, HPLC of Formula: 2016-56-0, the publication is Langmuir (2001), 17(12), 3573-3578, database is CAplus.

The phase behavior of carboxylic acid/alkylamine mixtures in H₂O is largely dictated by a proton transfer from the acid to the amine, which will lead to charged species. If the distribution of C atoms is unequal between the acid and the amine, the result will be an ionic surfactant with an organic counterion. The phase diagram for the ternary system HOAc-dodecylamine-H₂O at 298.2 K was determined Dodecylamine forms a lamellar phase with H₂O, but when HOAc is added up to an equimol. ratio between acid and amine, 3 new phases appear. These phases are an isotropic solution phase, a hexagonal liquid crystalline phase, and a cubic liquid crystalline phase. These 3 phases are not able to incorporate any excess amine. The solution phase shows the existence of micelles, which are spherical at high dilution, but show an elongation close to the phase border to the hexagonal phase.

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, HPLC of Formula: 2016-56-0.

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

Hanumantha Rao, K. published the artcileSolution chemistry of mixed cationic/anionic collectors and flotation separation of feldspar from quartz, Safety of Dodecylamineacetate, the publication is Mines & Carrieres: Les Techniques (1994), 66-71, database is CAplus.

The behavior of cationic and anionic collector mixtures in the feldspar-quartz flotation system has been investigated through conductivity, surface tension, zeta-potential and flotation studies. The results show the formation of mol. complexes between oppositely charged collector ions through charge neutralization. The mol. complexes are found to have a higher surface activity than the individual components. The mole ratio of the mixed composition is found to have a significant effect on flotation. Mole ratio less than unity (anionic/cationic) of collector mixtures increases the flotation recoveries. If the mole fraction of the anionic collector is greater than the mole fraction of cationic collector in a mixed composition, flotation ceases. The flotation selectivity principally depends on the inherent differences in the surface charges of feldspar and quartz at the flotation pH values of ¡Ü2. The zeta-potential and flotation results are discussed in terms of the adsorption behavior of mixed collectors on these minerals.

Mines & Carrieres: Les Techniques 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

Rao, K. Hanumantha published the artcileSolution chemistry of mixed cationic/anionic collectors and flotation separation of feldspar from quartz, HPLC of Formula: 2016-56-0, the publication is Publications of the Australasian Institute of Mining and Metallurgy (1993), 3/93(XVIII International Mineral Processing Congress), 837-44, database is CAplus.

The behavior of cationic and anionic collector mixtures in the feldspar-quartz flotation system was studied through conductivity, surface tension, zeta-potential, and flotation studies. The results show the formation of mol. complexes between oppositely charged collector ions through charge neutralization. The mol. complexes have a higher surface activity than the individual components. The mole ratio of the mixed composition has a significant effect on flotation. Use of collector mixtures with a mole ratio <1 (anionic/cationic) increases the flotation recoveries. If the mole fraction of the anionic collector is greater than the mole fraction of the cationic collector in a mixed composition, flotation ceases. The flotation selectivity principally depends on the inherent differences in the surface charges of feldspar and quartz at flotation pH ¡Ü2. The zeta-potential and flotation results are discussed in terms of the adsorption behavior of mixed collectors on these minerals.

Publications of the Australasian Institute of Mining and Metallurgy 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, HPLC of Formula: 2016-56-0.

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

Aristov, B. G. published the artcileAdsorption of amines from aqueous solutions on copper phthalocyanine, Synthetic Route of 2016-56-0, the publication is Zhurnal Fizicheskoi Khimii (1979), 53(7), 1859-62, database is CAplus.

The adsorption of pentyl-, hexyl-, and octylamine and octylammonium and dodecylammonium acetates on ¦Â-phthalocyanine dyes was studied in aqueous solutions The adsorption capacity (a_m) and the surface area, occupied by adsorbed amine mols. on Cu phthalocyanine (I), were determined The large a_m value for pentylamine is explained by specific interaction (an addnl. to the dispersion) of pentylamine mols. on 010 lattice of I. The structure of the adsorbed layer is discussed. For I, the distance between the adsorption centers is ?7.2 ?.

Zhurnal Fizicheskoi Khimii 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

Wakamatsu, T. published the artcileSelective flotation of quartz and feldspar using non-ionic surfactant, Computed Properties of 2016-56-0, the publication is Publications of the Australasian Institute of Mining and Metallurgy (2005), 803-805, database is CAplus.

In order to develop the HF-free flotation reagent system, the main objective of this investigation was to study the possibility of separation of quartz from feldspar using non-ionic surfactants as the collector. The non-ionic surfactants used were polyoxyethyl cetyl ether (PECE) and polyethylene glycol monocetyl ether (PGME). The flotation behavior of quartz and microcline with PECE and PGME was investigated. Each surfactant was a good selective collector for quartz with its recovery being influenced by pH and surfactant concentration Quartz is floated favorably by both types of polyoxyethylene non-ionic surfactant whereas microcline was not so much. The floatability of quartz increases as the oxyethylene length of surfactants increases. Zeta potential measurements in the system of PGME/mineral were also carried out. It was determined that in the absence of PGME the points of zero charge for quartz and microcline should be approx. at pH 2.5 and 1.8, resp. The addition of PGME to the system causes both minerals to become less neg. charged. Differences in the zeta potential value between quartz and microcline, in the presence of PGME, were detected. It can be suggested that the interaction of the oxyethylene group to the microcline surface should not be as strong as that to the quartz surface. In the mixed surfactant system of PGME and dodecylamine acetate (DAA), a small addition of DAA causes drastic enhancement of quartz flotation in the wide pH range of 1 ? 10. In the mixed surfactant system selective flotation of quartz from microcline would be anticipated at pH <3.0. The quartz floatability is thought to be as a result of the hydrophobic interaction between the adsorbed surfactant chains at the mineral-water interface.

Publications of the Australasian Institute of Mining and Metallurgy 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 C8H10O2, Computed Properties of 2016-56-0.

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

Muhammad, Amr Fatehy published the artcilePotential for upgrading El-Nakheil oil shale by froth flotation, Formula: C14H31NO2, the publication is Oil Shale (2013), 30(1), 48-59, database is CAplus.

The necessity to satisfy the increasing demand for energy and the progressive depletion of crude oil resources have renewed interest in oil shale as an alternative fuel resource. This paper aims at determining the potential for upgrading El-Nakheil oil shale, Egypt, using froth flotation. Samples were prepared by comminution followed by sieving into different size fractions. The flotation behavior of the material and extent of cleaning were studied with respect to non-ionic and ionic collectors of anionic and cationic types. The organic rich portions of samples could not be rendered sufficiently hydrophobic by the collectors used and the selectivity towards surfactant was very low.

Oil Shale 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, Formula: C14H31NO2.

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