Unravelling threedimensional adsorption geometries of

Unravelling threedimensional adsorption geometries of

The second reason is that addition of oleic acid to the EG subphase has proven to stop oriented attachment of the NCs 4. The single NC adsorption geometry is key to understand the behavior of

Synthesis and characterization of a magnetic adsorbent

Synthesis and characterization of a magnetic adsorbent

In the present study, Fe 3+ was partially reduced by H 2 A after iron mud was dissolved with nitric acid and the magnetic adsorbent was synthesized via Fe 2+ /Fe 3+ coprecipitation at room temperature. To further reduce the production cost, acid wastewater from a propylene plant was used to replace nitric acid in digestion of iron mud.

Activated carbon Wikipedia

Activated carbon Wikipedia

Activated carbon, also called activated charcoal, is a form of carbon processed to have small, lowvolume pores that increase the surface area available for adsorption or chemical reactions. Activated is sometimes substituted with active.. Due to its high degree of microporosity, one gram of activated carbon has a surface area in excess of 3,000 m 2 (32,000 sq ft) as determined by gas adsorption.

US2705723A Separation of oleic acid from stearic and

US2705723A Separation of oleic acid from stearic and

US2705723A US222252A US22225251A US2705723A US 2705723 A US2705723 A US 2705723A US 222252 A US222252 A US 222252A US 22225251 A US22225251 A US 22225251A US 2705723 A US2705723 A US 2705723A Authority US United States Prior art keywords stearic oleic acid acetonitrile acids solvent Prior art date 19510421 Legal status (The legal status is an assumption and is not a

Froth Flotation of Iron Ores sapub

Froth Flotation of Iron Ores sapub

With the depleting reserves of highgrade iron ore in the world, froth flotation has become increasingly important to process intermediate and lowgrade iron ore in an attempt to meet the rapidly growing demand on the international market. In over half a century''s practice in the iron ore industry, froth flotation has been established as an efficient method to remove impurities from iron ore.

Surface Modifiion of Fe3O4 as Magnetic Adsorbents for

Surface Modifiion of Fe3O4 as Magnetic Adsorbents for

When the competing ion such as Zn(II) presents, the adsorption efficiency of the adsorbent for all four precious metals, which are Pd(IV), Au(III), Pd(II), and Ag(I), reduces much. Magnetite nanoparticles could be directly modified with an organic compound of oleic acid. Iron oxide surface possibly bonds to carboxylic end of lauric acid

Reverse anionic flotation of quartz from Muro iron ore

Reverse anionic flotation of quartz from Muro iron ore

The recovery of iron from lowgrade (31.6% Fe) Muro iron ore was investigated using reverse anionic flotation of quartz. Tests were performed to investigate the effect of pH, the effects of using distilled vs. tap water as the flotation medium and the effects of using cassava starch vs. dextrin for the depression of iron

Minerals Free FullText Selective Separation of

Minerals Free FullText Selective Separation of

The fatty acid type collectors, such as oleic acid and sodium oleate, are widely used in the flotation of fluorite, barite and calcite [21,22,23,24]. Flotation recovery of these three minerals with different sodium oleate dosages at pH = 7 are presented in Figure 2. The flotation recovery of barite was the highest, and that of calcite was the

IJREAT International Journal of Research in Engineering

IJREAT International Journal of Research in Engineering

The efficacy of conventional oleic acid collector for the separation of iron values from low grade ores containing quartz and alumina as gangue minerals was investigated. Adsorption of oleic acid on hematite, quartz and alumina was studied and found to be pH dependent. The adsorption

The adsorption of dodecylamine and oleic acid on kaolinite

The adsorption of dodecylamine and oleic acid on kaolinite

The adsorption ability of kaolinite (0 0 1) surface toward dodecylamine and oleic acid is stronger than that of the (001) surface. The polar head groups of dodecylamine and oleic acid are mainly adsorbed on the kaolinite surface by hydrogen bonding and electrostatic attraction.

Comparative adsorption of saturated and unsaturated fatty

Comparative adsorption of saturated and unsaturated fatty

A detailed comparison of the adsorption behavior of long straight chain saturated and unsaturated fatty acids at the iron oxide/oil interface has been considered using a combination of surface study techniques. The PNR study of oleic acid adsorption indies chemisorbed monolayer adsorption, with a further diffuse reversible adsorbed layer

Froth Flotation of Iron Ores sapub

Froth Flotation of Iron Ores sapub

With the depleting reserves of highgrade iron ore in the world, froth flotation has become increasingly important to process intermediate and lowgrade iron ore in an attempt to meet the rapidly growing demand on the international market. In over half a century''s practice in the iron ore industry, froth flotation has been established as an efficient method to remove impurities from iron ore.

Adsorption Selectivity of Fatty Acid Collector by

Adsorption Selectivity of Fatty Acid Collector by

Selective adsorption of collectors on mineral surface can directly impact the flotation separation performance. Mineral flotation tests indied that reverse flotation of synthetic magnetite can only bring a 2 to 4 percent increase in the concentrate grade, tailings grade remains high. The amounts of commonly used fatty acid collector, such as sodium oleate, adsorbed onto mineral surface are

Adsorption of Organic Compounds Found in Human Sebum

Adsorption of Organic Compounds Found in Human Sebum

adsorption of two organic compounds found in human sebum (squalene and oleic acid) on illitic, kaolinitic, and chloritic phyllosilies. To evaluate the influence of the removal of carbonates and iron compounds on adsorption properties, illitic clays were chosen, because, in spite of the widespread occurrence of illite in nature,

Adsorption Selectivity of Fatty Acid Collector by

Adsorption Selectivity of Fatty Acid Collector by

Selective adsorption of collectors on mineral surface can directly impact the flotation separation performance. Mineral flotation tests indied that reverse flotation of synthetic magnetite can only bring a 2 to 4 percent increase in the concentrate grade, tailings grade remains high. The amounts of commonly used fatty acid collector, such as sodium oleate, adsorbed onto mineral surface are

Model for the Calculation of the Concentration of Sulphur

Model for the Calculation of the Concentration of Sulphur

used is present as dispersion of oleic acid, and its adsorption on the surface of the iron oxides is similar to the process of heterocoagulation involving positively charged iron oxide particles and negatively charged oleic acid droplet. Nwoye (2008) reported that Agbaja oolitic iron ore, which has not been responsive to so many

Comparative Adsorption of Saturated and Unsaturated Fatty

Comparative Adsorption of Saturated and Unsaturated Fatty

Comparative Adsorption of Saturated and Unsaturated Fatty Acids at the Iron Oxide Oil Interface A detailed comparison of the adsorption behavior of long straight chain saturated and unsaturated fatty acids at the iron oxide oil interface has been considered using a combination of surface study techniques. The PNR study of oleic acid

Adsorption Selectivity of Fatty Acid Collector by

Adsorption Selectivity of Fatty Acid Collector by

Selective adsorption of collectors on mineral surface can directly impact the flotation separation performance. Mineral flotation tests indied that reverse flotation of synthetic magnetite can only bring a 2 to 4 percent increase in the concentrate grade, tailings grade remains high. The amounts of commonly used fatty acid collector, such as sodium oleate, adsorbed onto mineral surface are

Covalently modified magnetite nanoparticles with PEG

Covalently modified magnetite nanoparticles with PEG

Aug 04, 2014 · Synthesis of oleic acid coated magnetite nanoparticles (MNPsOA) MNPsOA were prepared by the method developed by Liu et al. [].Briefly, 11.60 g FeCl 3.6H 2 O and 4.30 g FeCl 2.4H 2 O were dissolved in 400 ml deionized water under nitrogen gas with vigorous stirring at 90°C. 15 ml of 25 wt% NH 4 OH was added to the solution. Then, 9 ml oleic acid was added dropwise into the

Adsorption of fatty acid soaps on hematite.

Adsorption of fatty acid soaps on hematite.

Oct 09, 2014 · Adsorption of fatty acid soaps on hematite. 1. ADSORPTION OF FATTY ACID SOAPS ON HEMATITE by Michael Uriel Oko A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfilment of the requirements for the Degree of Master of Engineering in Metallurgical Engineering McGill University, Montreal, Canada.

Oleic acid coating on the monodisperse magnetite

Oleic acid coating on the monodisperse magnetite

Oleic acid (OA) is a commonly used surfactant to stabilize the magnetic nanoparticles synthesized by the traditional coprecipitation method, and some studies [12,13] have proved that the strong chemical bond formed between the carboxylic acid and the amorphous iron and amorphous iron oxide nanoparticles. However, it is hardly to know the

Influence of sodium silie modulus on iron ore flotation

Influence of sodium silie modulus on iron ore flotation

Dec 10, 2013 · Read "Influence of sodium silie modulus on iron ore flotation with sodium oleate, International Journal of Mineral Processing" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publiions available at your fingertips.

FATTY ACIDS AND ITS DERIVATIVES AS CORROSION

FATTY ACIDS AND ITS DERIVATIVES AS CORROSION

corrosion inhibition is based on the adsorption of the inhibitor molecules on the active sites and/or deposition of the Iron 0.5M deaerated H2S04 Langmuir Mixed [31] Linolenic acid Triethanolamine salts Iron 0.5M Oleic acid 1aminoanthraquinon e amide Steel (API 5L

XPS & FTIR Study of Adsorption Characteristics Using

XPS & FTIR Study of Adsorption Characteristics Using

acid treatment confirmed the adsorption of OA (oleic acid) onto the surface. The most adsorption occurs at around pH 10, when RCOOis predominant in solution and has ample opportunities for interaction with the mineral surface. The appearance of CS2 on the surface of smithsonite exposes the adsorption of KAX (potassium amyl xanthate) onto surface.

Comparative adsorption of saturated and unsaturated

Comparative adsorption of saturated and unsaturated

range of 56 x 106 mol m2 for stearic acid on an iron oxide powder from a nonpolar oil, and Studt observes a similar value for stearic acid on iron powder, both according well with the observations here18,19. Unusually, Wheeler et al. report a slightly higher adsorption plateau for oleic acid on an iron

Covalently modified magnetite nanoparticles with PEG

Covalently modified magnetite nanoparticles with PEG

Aug 04, 2014 · Synthesis of oleic acid coated magnetite nanoparticles (MNPsOA) MNPsOA were prepared by the method developed by Liu et al. [].Briefly, 11.60 g FeCl 3.6H 2 O and 4.30 g FeCl 2.4H 2 O were dissolved in 400 ml deionized water under nitrogen gas with vigorous stirring at 90°C. 15 ml of 25 wt% NH 4 OH was added to the solution. Then, 9 ml oleic acid was added dropwise into the

Adsorption of Fatty Acids on Iron (Hydr)oxides from

Adsorption of Fatty Acids on Iron (Hydr)oxides from

Jun 28, 2011 · The interaction of iron (hydr)oxides with fatty acids is related to many industrial and natural processes. To resolve current controversies about the adsorption configurations of fatty acids and the conditions of the maximum hydrophobicity of the minerals, we perform a detailed study of the adsorption of sodium laurate (dodecanoate) on 150 nm hematite (αFe2O3) particles as a model

Adsorption differences of sodium oleate on siderite and

Adsorption differences of sodium oleate on siderite and

To separate siderite from carbonatebearing iron ore efficiently, specific adsorption configurations and effective species were investigated to compare the adsorption differences of sodium oleate

Modified Fatty Acids: Molecular Modeling and Docking

Modified Fatty Acids: Molecular Modeling and Docking

Fatty acids are known as oxhydryl collectors which are used in practice for nonsulfide ore flotation. However, the selectivity of these collectors is low towards to gangue minerals occurring in the ore. In the present study the introduction of substitutes into the aliphatic chain of fatty acids has been suggested as the way for improvement the selectivity of collectors.

Oleic acid adsorption at the goethitewater interface

Oleic acid adsorption at the goethitewater interface

The competing bulk precipitation equilibria for oleic acid mineral phases such as iron (III) oxides, barite, calcite and fluorite and the relevant metal oleates, were considered graphically. Literature, adsorption, flotation recovery, electrokinetic and infrared work was examined in the light of this bulk precipitation data.

Improved functionalization of oleic acidcoated iron oxide

Improved functionalization of oleic acidcoated iron oxide

Aug 07, 2012 · The crystal structure of the oleic acidcoated iron oxide nanoparticles was determined via Xray powder diffraction (step size = 0.05°, dwell time = 40 s). As Fig. 4 indies, the spectrum closely resembles the reference spectrum of magnetite. However, since the difference between maghemite and magnetite is very subtle in Xray diffraction

THE ANTIBACTERIAL ACTIVITY OF MAGNETIC NANOFLUID:

THE ANTIBACTERIAL ACTIVITY OF MAGNETIC NANOFLUID:

Preparation of Fe3O4 /oleic acid/cephalosporins coreshell/adsorptionshell. The coreshell magnetic nanoparticles/oleic acid are dried for 24 hours at 105ºC (after the preliminary CHCl3 dispersion) and then dispersed alternately in chloroform with Cephoperazone, Cefotaxime, Ceftriaxone and Cephaclor. The cephalosporin deposition concentration on

THE ANTIBACTERIAL ACTIVITY OF MAGNETIC NANOFLUID:

THE ANTIBACTERIAL ACTIVITY OF MAGNETIC NANOFLUID:

Preparation of Fe3O4 /oleic acid/cephalosporins coreshell/adsorptionshell. The coreshell magnetic nanoparticles/oleic acid are dried for 24 hours at 105ºC (after the preliminary CHCl3 dispersion) and then dispersed alternately in chloroform with Cephoperazone, Cefotaxime, Ceftriaxone and Cephaclor. The cephalosporin deposition concentration on

IJREAT International Journal of Research in Engineering

IJREAT International Journal of Research in Engineering

The efficacy of conventional oleic acid collector for the separation of iron values from low grade ores containing quartz and alumina as gangue minerals was investigated. Adsorption of oleic acid on hematite, quartz and alumina was studied and found to be pH dependent. The adsorption

FLOTATION CHEMISTRY OF HEMATITE/OLEATE SYSTEM

FLOTATION CHEMISTRY OF HEMATITE/OLEATE SYSTEM

FLOTATION CHEMISTRY OF HEMATITE/OLEATE SYSTEM R.D. KULKARNI. and P. SOMASUNDARAN niques depending upon the nature of the available ore bodies. In direct flotation, iron bearing mineral, mostly hematite, is floated using oleate as collec sults from the fact that the oleic acid in aqueous solution undergoes hydro

US2705723A Separation of oleic acid from stearic and

US2705723A Separation of oleic acid from stearic and

US2705723A US222252A US22225251A US2705723A US 2705723 A US2705723 A US 2705723A US 222252 A US222252 A US 222252A US 22225251 A US22225251 A US 22225251A US 2705723 A US2705723 A US 2705723A Authority US United States Prior art keywords stearic oleic acid acetonitrile acids solvent Prior art date 19510421 Legal status (The legal status is an assumption and is not a

Molecular modeling studies of oleate adsorption on iron

Molecular modeling studies of oleate adsorption on iron

Mar 15, 2014 · Read "Molecular modeling studies of oleate adsorption on iron oxides, Applied Surface Science" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publiions available at your fingertips.

Improved functionalization of oleic acidcoated iron oxide

Improved functionalization of oleic acidcoated iron oxide

Aug 07, 2012 · The crystal structure of the oleic acidcoated iron oxide nanoparticles was determined via Xray powder diffraction (step size = 0.05°, dwell time = 40 s). As Fig. 4 indies, the spectrum closely resembles the reference spectrum of magnetite. However, since the difference between maghemite and magnetite is very subtle in Xray diffraction

Adsorption of fatty acid soaps on hematite.

Adsorption of fatty acid soaps on hematite.

Oct 09, 2014 · Adsorption of fatty acid soaps on hematite. 1. ADSORPTION OF FATTY ACID SOAPS ON HEMATITE by Michael Uriel Oko A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfilment of the requirements for the Degree of Master of Engineering in Metallurgical Engineering McGill University, Montreal, Canada.

Is Oleic Acid Or Oleoyl Sarcosine more Selective in the

Is Oleic Acid Or Oleoyl Sarcosine more Selective in the

Oleic acid has been almost invariably used in the flotation of siliceous fluorite ores. The performance of oleic acid, however, deteriotates with carbonaceous fluorite ores. Oleoyl sarcosine developed recently has been found to produce results superior over oleic acid with ores containing high calcite contents. While the mechanism of oleate adsorption is usually considered as chemisorption

Froth Flotation of Iron Ores sapub

Froth Flotation of Iron Ores sapub

With the depleting reserves of highgrade iron ore in the world, froth flotation has become increasingly important to process intermediate and lowgrade iron ore in an attempt to meet the rapidly growing demand on the international market. In over half a century''s practice in the iron ore industry, froth flotation has been established as an efficient method to remove impurities from iron ore.

Physicochemical studies of oxide zinc mineral flotation

Physicochemical studies of oxide zinc mineral flotation

The DRIFT and XPS spectra confirm the adsorption of dodecylamine, oleic acid, hexylmercaptan, KAX and mixed collector (KAX+DDA) on the smithsonite surface. These results are consistent with the zetapotential, contact angle and also microflotation results. The studies on oxide zinc ore indie a maximum bench scale flotation recovery of 84.5 %

Reverse anionic flotation of quartz from Muro iron ore

Reverse anionic flotation of quartz from Muro iron ore

The recovery of iron from lowgrade (31.6% Fe) Muro iron ore was investigated using reverse anionic flotation of quartz. Tests were performed to investigate the effect of pH, the effects of using distilled vs. tap water as the flotation medium and the effects of using cassava starch vs. dextrin for the depression of iron

Model for the Calculation of the Concentration of Sulphur

Model for the Calculation of the Concentration of Sulphur

used is present as dispersion of oleic acid, and its adsorption on the surface of the iron oxides is similar to the process of heterocoagulation involving positively charged iron oxide particles and negatively charged oleic acid droplet. Nwoye (2008) reported that Agbaja oolitic iron ore, which has not been responsive to so many

Effects of Eh and pH on the oleate flotation of iron oxides

Effects of Eh and pH on the oleate flotation of iron oxides

Nov 01, 2015 · Read "Effects of Eh and pH on the oleate flotation of iron oxides, Minerals Engineering" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publiions available at your fingertips.

The separation of monazite from zircon by flotation PDF

The separation of monazite from zircon by flotation PDF

The conditions for the separation of monazite from zircon in anionic (oleic acid and sodium dodecyl sulphate) and ionic (dodecylaminium chloride) collector systems using sodium sulphide as regulator have been studied by means of electrokinetic measurements, direct flotation tests, and adsorption determination of the collector.

Flotation Chemistry of Soluble Minerals Phosphates

Flotation Chemistry of Soluble Minerals Phosphates

Hydrolyzable surfactants such as oleic acid and amine can undergo special association interactions that can influence their adsorption and flotation properties. For example, oleic acid undergoes dissociation to form ions (R") at high pH values and exist as neutral molecules (RH) at low pH values.