Compared to HDT catalysts such as Ni−Mo/Al2O3 and Co− Mo/Al2O3, NPs of iron oxide (Fe2O3) are potentially costeffective as the ore hematite (α-Fe2O3) is one of the most abundant iron oxide minerals and also nontoxic.14 Additionally, nanoparticles of iron oxide do not require rigorous and special methods of preparation.

 — Recovery of rare earth elements minerals from iron oxide–silicate rich tailings – Part 1: Magnetic separation ... Typically, the differences in specific gravity, magnetic, electrical properties, and other physicochemical properties of the REE and gangue minerals are exploited in various beneficiation processes using magnetic, electrostatic ...

 — The properties of upgraded oil at the optimum condition are API gravity 21.1o, viscosity 105.75 cP, sulfur reduced by 37.54 %, metals (Ni + V) reduced by 68.9 %, and naphtha plus middle distillate ...

 — First, low-intensity magnetic separation (LIMS) was assessed to remove iron oxides from the heavy mineral gravity concentrate. The non-magnetic fraction was then processed using a WHIMS to determine if the various REMs could be effectively separated from zircon. ... However, upgrading was impacted after each subsequent pass and the …

 — The upgrading of rare earth oxides from iron-oxide silicate rich tailings: Flotation performance using sodium oleate and hydroxamic acid as collectors. ... Gravity concentration may be also exploited to reject liberated low specific gravity silicate minerals such quartz, prior to flotation. ...

 — A study of the feasibility of upgrading rare earth elements minerals from iron-oxide-silicate rich tailings using Knelson concentrator and shaking table ... studied using two gravity separation units, a Knelson concentrator (KC) and shaking table. The feed sample and gravity separation products were characterised using ...

A novel direct method in one-step for catalytic heavy crude oil upgrading using iron oxide nanoparticles. O. Morelos-Santos, A. I. Reyes de la Torre, +4 authors. M. José …

 — Semantic Scholar extracted view of "The upgrading of rare earth oxides from iron-oxide silicate rich tailings: Flotation performance using sodium oleate and hydroxamic acid as collectors" by G. Abaka-Wood et al. ... Ce, Nd) and rare metals (Sn, Nb, W) as by-products of kaolin production – Part 3: Processing of fines using gravity and ...

 — Typically, the magnetic, specific gravity, and electrical properties of minerals are used to produce preconcentrates for subsequent downstream processes ... The upgrading of rare earth oxides from iron-oxide silicate rich tailings: flotation performance using sodium oleate and hydroxamic acid as collectors. Adv. Powder Technol., 29 ...

 — All of the upgrading and dehydrogenation experiments were carried out at 300 °C, 72 bar (1044.27 psi) and 24 h of reaction time. The upgrading of heavy crude oil in presence of decalin and Ni-stearate exhibited a good performance for conversion of decalin as well as for promoting the in-situ upgrading of heavy crude oil.

Joint Gramian inversion of gravity, magnetic and gravity gradient tensor data for the modelling of Mesoproterozoic iron oxide deposits, southeast Missouri, USA. ... For the study area, ground gravity and high-resolution airborne magnetic and gravity gradiometry data sets are available. An efficient and novel joint inversion algorithm for the ...

 — First, low-intensity magnetic separation (LIMS) was assessed to remove iron oxides from the heavy mineral gravity concentrate. The non-magnetic fraction was then processed using a WHIMS to determine if …

 — The results showed that the valuable minerals can be effectively concentrated by gravity separation even in poorly liberated conditions. The feasibility of upgrading REEs using gravity separation units to recover iron oxide silicate-rich tailings containing low-grade REO in Australia was studied by Abaka-Wood et al. 13

 — In situ catalytic conversion or upgrading of heavy oil with the aid of multimetallic nanocatalysts is a promising cost-effective and environmentally friendly …

 — Renewed economic interest in iron oxide–apatite (IOA) deposits — containing tens to hundreds of millions of tonnes of Fe and substantial amounts of rare …

M. Sadeghi, C. Bazin DOI: 10.4236/aces.2020.103011 150 Advances in Chemical Engineering and Science 1. Introduction The valorization of iron ores is commonly carried out by gravity and/or mag-

 — Within the iron metallogenic province of southeast Missouri, USA, there are several mines that contain not only economic iron resources, magnetite and/or hematite, but also contain rare earth elements, copper and gold. An area including three major deposits, Pea Ridge, Bourbon, and Kratz Spring, was selected for detailed modeling for the upper …

It is expected that when the REE minerals are well liberated, higher REE minerals recovery and upgrade at lower iron oxides and silicate recoveries can be achieved with the flotation, WHIMS, and gravity (KC and shaking …

 — Detailed optimization of the reaction conditions with iron oxide dispersed nanoparticles (≤ 50 nm) for in situ catalytic upgrading of heavy oil was carried out at the following ranges ...

 — The particle size of the catalysts determines their efficiency during thermal exposure. In this regard, the aim of the work [35] was to study iron-based compounds (iron carbonyl, iron oxide, metallic iron) in the process of thermocatalytic upgrading of heavy oil at a temperature of 250 °C. The optimum catalyst particle size (Fe 3 O 4) is 20 ...

 — Detailed optimization of the reaction conditions with iron oxide dispersed nanoparticles (≤ 50 nm) for in situ catalytic upgrading of heavy oil was carried out at the following ranges ...

 — Detailed optimization of the reaction conditions with iron oxide dispersed nanoparticles (≤50 nm) for in situ catalytic upgrading of heavy oil was carried out at the following ranges; temperature 355–425 °C, reaction time 20–80 min, agitation 200–900 rpm, initial hydrogen pressure 10–50 bar, and iron metal loading 0.03–0.4 wt %. It ...

 — The studies carried out by Abaka-wood et al. showed that when REE minerals are in unliberated association with Iron-Oxide-Silicate tailings, ... Thus, upgrading nickel content by gravity concentration, before the hydro metallurgical or pyro metallurgical processing, is necessitated. Application of the falcon concentrator for nickel was studied ...

 — Oils are characterized by their API (American Petroleum Institute) gravity. API gravity gives a comparison with respect to water of how heavy or light the oil is. ... Upgrading by using hydrogen donors is an efficient way to ... was found to reduce with the highest reduction observed in cobalt and nickel oxide nanoparticles when compared to ...

 — The black sand magnetite is a raw material to produce iron and steel. High content magnetite in the top meter beach sands of the north-west of El-Burullus Lake of Egypt is separated and mineralogically and geochemically investigated. Magnetite content obtained by laboratory techniques varies between 2.92 and 0.11 wt%, with 1.15 wt% …

 — The chemical effect of supercritical water (SC-H 2 O) on catalytic cracking of heavy petroleum residue was investigated over silica-supported hematite iron oxide nanoparticles, and the stability of catalyst against coke formation was approved by numerous analyses after sequence of reactions. First, the catalysts of process, with …

 — Detailed optimization of the reaction conditions with iron oxide dispersed nanoparticles (≤50 nm) for in situ catalytic upgrading of heavy oil was carried out at the following ranges; temperature 355–425 …

optimization of the reaction conditions with iron oxide dispersed nanoparticles (≤50 nm) for in situ catalytic upgrading of heavy oil was carried out at the following ranges; temperature 355−425 °C, reaction time 20−80 min, agitation 200−900 rpm, initial hydrogen pressure 10−50 bar, and iron metal loading 0.03−0.4 wt %.

 — For example, mixed iron oxide nanoparticles synthesized in situ from the iron(III) acetylacetonate complex are shown to be efficient catalysts for in situ upgrading of heavy oil [12, 13 ...

 — Reverse flotation was adopted for Indonesian iron-rich laterite ore from Pomalaa to float siliceous minerals in the separation of iron mineral. Nickel siliceous mineral such as garnierite is one of the silicate minerals containing in laterite ore that are undesirable and must be eliminated from the ore before used as raw material for iron …