The present disclosure provides a method for co-extraction of vanadium, titanium and chromium from vanadium slag. The method selectively reduces pyroxene and fayalite wrapped on spinel through low-temperature hydrogen reduction, iron removal by ferric chloride, and low-temperature leaching of the vanadium slag by oxalic acid, thereby destroying a structure of the spinel, dissociating a spinel phase and a silicate phase, and fully exposing the spinel phase. The method also directly leaches the vanadium slag at a low temperature by acidity and strong complexation of the oxalic acid, and destroys the structure of the spinel, such that vanadium, titanium, chromium and oxalate are complexed into a solution to co-extract vanadium, titanium and chromium. The present disclosure extracts vanadium, titanium and chromium from the vanadium slag, with a leaching rate each being greater than 99%.

A method for upgrading an ilmenite ore for yielding a high-TiO.sub.2-content titanium source by separating and removing an iron component from ilmenite (FeTiO.sub.3), which includes an oxidation step of oxidizing a starting ilmenite; after the oxidation step, a reduction step of reducing the treated ilmenite; and after the reduction step, an extraction step of dissolving the iron component with an acid, to thereby remove the iron component. Also disclosed is a production method for producing a high-TiO.sub.2-content titanium source, which includes upgrading an ilmenite ore as described above, and a high-TiO.sub.2-content titanium source produced through the production method.

A method for the preparation of titanium dioxide, the method comprising the steps of subjecting a titanium containing leach residue to a concentrated sulfuric acid digest step; and in turn subjecting that residue to a leach in dilute sulfuric acid, whereby a black liquor is obtained and from which titanium dioxide is in turn obtained.

The present disclosure discloses an ethylene degradation catalyst and a preparation method and a use thereof.

The present disclosure discloses an ethylene degradation catalyst and a preparation method and a use thereof.

This invention refers to a technically and economically viable process for recovery of relevant metallic and non-metallic contents from mining residues, particularly the bauxite residue, using it in its integral form. Such a process route uses energy from microwaves, assisted leaching and logic sequencing of steps that allow a technically and economically viable removal of components from the bauxite residue, particularly the residue from the Bayer process. The invention also refers to a microwave reactor that is appropriate for performing the above-mentioned process, as well as to a method for heating a mining product.

A method for extracting metal values from a low grade primary metal oxide ore feedstock is provided. The method includes providing a low grade primary metal oxide ore containing a primary metal and scandium; subjecting the ore to acid leaching, thus yielding an acidic leachate; extracting the primary metal and scandium from the leachate, thereby yielding an acidic barren leachate; and using the acidic barren leachate in a subsequent iteration of the acid leaching step.

A method of processing red mud comprising: heating red mud to a predetermined temperature; grinding the red mud to a predetermined particle size; and physically extracting iron components from the red mud; physically extracting aluminum components from the red mud, said physically extracting of aluminum components being separate from the physically extracting of iron components, wherein the steps of physically extracting iron components and physically extracting aluminum components are performed without requiring addition of chemical additives to the red mud.

A method (500) for producing a titanium product is disclosed. The method (500) can include obtaining TiO.sub.2-slag (501) and reducing impurities in the TiO.sub.2-slag (502) to form purified TiO.sub.2 (503). The method (500) can also include reducing the purified TiO.sub.2 using a metallic reducing agent (504) to form a hydrogenated titanium product comprising TiH.sub.2 (505). The hydrogenated titanium product can be dehydrogenated (506) to form a titanium product (508). The titanium product can also be optionally deoxygenated (507) to reduce oxygen content.

A method (400) for producing a titanium product is disclosed. The method (400) can include obtaining TiO.sub.2-slag (401), and producing a titanium product from the TiO.sub.2-slag using a metallic reducing agent (402) at a moderate temperature and a pressure to directly produce a titanium product chemically separated from metal impurities in the TiO.sub.2 slag (403). The titanium product can comprise TiH.sub.2 and optionally elemental titanium. Impurities in the titanium product can then removed (404) by leaching, purifying and separation to form a purified titanium product.