The present invention relates to the processing of natural titanium-containing feedstock, mainly ilmenite concentrate, including ilmenite ores with a low TiO.sub.2 content, into products with high added value without generating any liquid or solid waste. The method according to the invention comprises the following stages: digesting ilmenite concentrate, processing the solid residue following ilmenite concentrate digestion, hydrolysis of titanium oxychloride, washing titanium oxides/hydroxides precipitate from impurities, calcination of titanium oxides/hydroxides precipitate, precipitation of iron hydroxides to obtain black, red and yellow iron oxide pigments, processing the mother liquor containing calcium chloride, regeneration of hydrogen chloride from ammonium chloride solution, obtaining ammonium sulfate and ammonium sulfate crystallization, obtaining crystalline ammonium chloride. The resulting products are pigments, pigment fillers, mineral fertilizers, construction materials, raw materials for the production of metals, and other products; they are used in various fields of application such as paint and coatings industry, pulp and paper industry, in the production of plastics, in metallurgy, in agricultural, construction industries and others.

This disclosure provides methods of making functionalized PEG iron oxide nanoparticles.

Methods are disclosed for dispersing nanoparticles in solvents, involving the use of a cationic species and an anionic species, where at least one of the ionic species is soluble in the nonpolar solvent and the other ionic species has a relatively strong affinity for the surface of the nanoparticles. The cationic species and the anionic species together form a cluster of ion pairs shielding the nanoparticles and enhancing their dispersibility in the nonpolar solvent.

Methods are disclosed for dispersing nanoparticles in solvents, involving the use of a cationic species and an anionic species, where at least one of the ionic species is soluble in the nonpolar solvent and the other ionic species has a relatively strong affinity for the surface of the nanoparticles. The cationic species and the anionic species together form a cluster of ion pairs shielding the nanoparticles and enhancing their dispersibility in the nonpolar solvent.

Novel date palm charcoal iron oxide nanocomposites (DPC-Fe.sub.3O.sub.4) are presented, as well as processes for making the same. These synthesized magnetic DPC-Fe.sub.3O.sub.4 nanocomposites have wide potential significant applications such as in energy storage devices, electronic devices, sensors, in drug delivery and medicine, catalytic application and also in water purification as an effective strong adsorbent.

Novel date palm charcoal iron oxide nanocomposites (DPC-Fe.sub.3O.sub.4) are presented, as well as processes for making the same. These synthesized magnetic DPC-Fe.sub.3O.sub.4 nanocomposites have wide potential significant applications such as in energy storage devices, electronic devices, sensors, in drug delivery and medicine, catalytic application and also in water purification as an effective strong adsorbent.

[Solving Means] A method of producing a magnetic powder includes: coating a surface of each of silica-coated precursor particles with at least one type of coating agent of a metal chloride or a sulfate; and firing the precursor particles coated with the coating agent.

[Solving Means] A method of producing a magnetic powder includes: coating a surface of each of silica-coated precursor particles with at least one type of coating agent of a metal chloride or a sulfate; and firing the precursor particles coated with the coating agent.

In one aspect, a method for fabricating metal particles is disclosed, which includes adding a plurality of metallic elements into a plasma reactor comprising a circulating fluid and two electrodes, evaporating the metallic elements to form metal vapor using plasma generated by at least one electric discharge pulse between the electrodes; and condensing the metal vapor to form metal particles. In some embodiments, the metal particles comprise metal oxide particles. In some embodiments, the metal particles are useful as part of pharmaceutical compositions or dietary supplements.

A magnetic particle composition (e) containing magnetic particles (c) and a chaotropic salt (D), the magnetic particles (c) each including a core particle (P) that is a magnetic silica particle containing a magnetic metal oxide particle (A), wherein the magnetic metal oxide particle (A) in the core particle (P) has a weight percentage of 60 wt % or more based on the weight of the core particle (P), and the magnetic particles (c) have a particle size distribution with a coefficient of variation of 5 to 50%.