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WO/1999/002456A1 |
The present invention provides a process for preparing an aqueous solution of FeCl¿3?. The process involves the steps of: (a) reacting an ore material comprising titanium and iron with chlorine and coke to form a metal chloride vapor st...
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WO/1998/055660A1 |
A method for purifying titanium by reacting crude titanium as a starting material with TiC1�4? to prepare purified titamium, comprising: (a) step 1 of reacting crude titanium as a starting material with TiC1�4? to produce vapor of lo...
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WO/1998/054095A1 |
A process and apparatus for producing titanium dioxide from titanium ore or slag is disclosed. The ore or slag (2) is reacted with sulfuric acid (3) in a reactor (1) in which hot gas for agitation (4) is used. Makeup acid from line (6) i...
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WO/1998/049355A1 |
A process is disclosed for recovering raw materials, in particular heavy metals such as chromium, by separation from waste and residues, wherein a liquid or viscous starting mixture and/or a starting mixture composed of crushed or ground...
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WO/1998/037249A1 |
The invention relates to tantalum powders poor in alkali and fluorine having a primary particle size of between 150 and 300 nm and a secondary particle size, defined by sintering of the primary particles, of more than 5 $g(m)m. By sinter...
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WO/1998/037022A1 |
Soluble manganese salts present as contamination of a solution containing iron salts are removed by adding an oxidation agent capable of converting the soluble manganese salts to manganese dioxide and by adding manganese dioxide particle...
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WO/1998/037248A1 |
The invention relates a tantalum powder free of alkali and fluorine, which for a relatively small primary particle size has comparatively large secondary particles and is suitable for producing capacitors with a specific charge of betwee...
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WO/1998/027010A1 |
The invention relates to a method for preparing an aluminium- or titanium-containing complex or complexes from an aluminium or titanium source respectively comprising reacting the aluminium or titanium source with a solvent consisting es...
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WO/1998/022632A1 |
A clean refractory metal sponge fines product is made from refractory metal sponge fines free of refractory metal oxides, carbides, nitrides and binary iron alloys; silicon carbide, oils, greases and organic compounds; salt; dust; dirt; ...
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WO/1998/017832A1 |
The invention concerns a method of de-chroming steel slag, oxygen being introduced into the liquid steel slag in an amount sufficient to convert iron quantitatively into iron oxide and at least 5 wt % of the iron oxide present in the sla...
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WO/1998/014622A1 |
The present invention relates to a process for obtaining metals from oxides using shuttle alloys, particularly titanium metal from titanium dioxide in the form of illmenite, rutile. The process can be adapted to obtain elemental metal or...
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WO/1998/008993A1 |
In a process for chlorinating titanium containing material in a fluidized bed reactor which evolves gaseous material including CO, COS, and TiCl¿4?, the improvement comprising introducing oxygen containing gas at a location or locations...
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WO/1998/004375A1 |
Hydrogenated titanium powder produced by the hydrogen embrittlement of titanium or its alloy, characterized in that the maximum particle diameter is substantially 150 $g(m)m or below and that thecontent of particles having a diameter of ...
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WO/1998/004750A1 |
The method for separating titanium and/or vanadium from pig iron envisages a sufficient quantity of iron oxides for slagging titanium being added to the pig iron in a first stage, the titanium being slagged and the slag separated, and th...
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WO/1997/046724A1 |
A process for obtaining chromium enriched chromite from chromite ores comprising the steps of: dry chlorinating the ores at a temperature between 400 �C and 750 �C to produce a chlorinated substrate containing acid soluble ferric oxi...
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WO/1997/046723A1 |
Besides a synthesis gas, a metallurgical raw material is to be produced from an oil containing heavy metals. To do this, the oil is partially oxidised and the heavy metal-containing soot is separated and burnt and the heavy metals thus o...
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WO/1997/040199A1 |
A process for sizing (i.e., comminuting) a tantalum powder including agglomerates of smaller particles, which process yields a tantalum powder having an as-comminuted agglomerate size distribution with the product of the Volume Mean Diam...
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WO/1997/038143A1 |
A method for controlling oxygen content in valve metal materials. The method includes deoxidizing a valve metal material, typically tantalum, niobium, or alloys thereof, and leaching the material in an acid leach solution at a temperatur...
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WO/1997/036013A1 |
A process for recovering metal values from a metal containing material including the metal values comprising digesting the metal containing material in a sulfuric acid solution comprising: sulfuric acid, a reducing agent, and a carbon so...
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WO/1997/036011A1 |
A process for selectively extracting metal values, including, uranium, thorium, scandium and zirconium, from starting materials which include the metal values. The process is particularly well suited to extracting metal and recovering me...
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WO/1997/036014A1 |
The processes of the present invention include mineral acid leaching of a metal-containing material, such as an ore residue, containing fluoridated metal values in the presence of a complexing agent which will complex fluoride ions. The ...
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WO/1997/020767A1 |
The instant invention is concerned with a non-polluting vapor-phase system of treating titanium-containing materials in fluidized bed (3) where a titanium-containing material (2) is reacted with sulfuric acid (5) and oxygen (6) under ele...
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WO/1997/019199A1 |
A method is disclosed including: (a) sizing a titania slag to a particle size range of from 75 microns to 850 microns; (b) oxidizing the sized titania slag by contacting the sized titania slag with an oxygen containing gas at a temperatu...
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WO/1997/012071A1 |
This invention relates to processes for the recovery of vanadium and optionally other metal values from vanadium-bearing materials, especially mineral ores such as titaniferous magnetites, and industrial wastes such as iron ores slag and...
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WO/1997/012066A1 |
This method enables the smelting reduction of chromium ores to be done with a high efficiency by charging such an amount of carbon material that permits a total surface area thereof per ton of slag to become not less than 60 m2. When a m...
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WO/1997/005295A1 |
The invention concerns a process and device for recovering hard alloys and sintered materials from secondary raw materials of appropriate type. The object of the invention is to dispense with the expensive equipment required for the know...
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WO/1997/003743A1 |
A method and system for improved continuous ion exchange chromatographic elemental separations of zirconium and hafnium and also for isotopic separations thereof from crude zirconium minerals by using zirconium (also containing hafnium) ...
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WO/1997/004141A1 |
A method and system for improved ion exchange chromatographic elemental separations of zirconium and hafnium elements and also, if desired, separations of the isotopes thereof from crude zirconium minerals by using improved crude aqueous...
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WO/1996/039241A1 |
A filter assembly is adapted for use with a plenum connected in fluid communication with a chlorinator reactor operative to reduce zircon sand into residue and chlorinator off gases of zirconium chloride and silicon chloride so that chlo...
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WO/1996/039359A1 |
Reduction of elemental carbon in the reaction zone of a carbochlorination reaction for producing zirconium chloride by periodically introducing zirconium oxide without additional carbon into the reaction zone under conditions which react...
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WO/1996/038220A1 |
A process of selectively separating a target metal contained in an aqueous solution by contacting the aqueous solution containing a target metal with an aqueous solution including a water-soluble polymer capable of binding with the targe...
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WO/1996/034992A1 |
Process for temperature control in a fluidized bed reactor for chlorinating titanium bearing material is disclosed by comparing a carbonyl sulfide concentration with a predetermined set range and manipulating the temperature until the ca...
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WO/1996/034989A1 |
In a process for producing hydraulic binders, raw steel and/or alloys like FeCr or FeV from chromium and/or vanadium-containing basic steel slags, the liquid steel slag is mixed with an additive from the group consisting of blast furnace...
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WO/1996/028577A1 |
A fast quench reaction includes a reactor chamber having a high temperature heating means such as a plasma torch at its inlet and a restrictive convergent-divergent nozzle at its outlet end. Reactants are injected into the reactor chambe...
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WO/1996/024699A1 |
The present invention provides a method of oxidising and removing metallic iron from a titanium-containing material which method includes oxidising the metallic iron in the presence of an additive that accelerates the rate of oxidation o...
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WO/1996/024555A1 |
A hydrometallurgical process is provided for producing pigment-grade TiO2 from an ilmenite ore concentrate containing by weight a relatively high magnesium content ranging up to about 10 %, an iron content of at least about 15 % and a ti...
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WO/1996/020892A1 |
Systems and methods are provided for producing ultra high purity titanium tetraiodide, on the order of at least 99.998 % pure, and for producing ultra high purity titanium metal having a purity of greater than 99.998 % pure. The system i...
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WO/1996/015987A1 |
This invention relates to a process for separating U or Th values from values of at least one other metal such as Ta, Nb, Sc, Zr, Ti or Mg, wherein all of the values are contained in a difficult soluble matrix of highly fluorinated feed ...
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WO/1996/013039A1 |
A process is taught for production of Mo-99 from uranium-235 and for managing waste produced therefrom. The process includes separation of the Mo-99 from irradiated uranium and solidification of the waste remaining after such separation....
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WO/1996/012047A1 |
A process for the recovery or separation of titanium and vanadium from a slag comprising mixing the slag with an alkali metal salt, and roasting the mixture in oxygen.
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WO/1996/010653A1 |
A mixture of alumina (Al2O3) and zircon (ZrSiO4) was subjected to mechanical milling. The presence of alumina was found to greatly enhance the disordering of zircon. Acid leaching of the milled oxide mixtures resulted in complete dissolu...
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WO/1996/010096A1 |
A process for extracting one or more metals from a metal containing material, as herein defined, including the step of treating said metal containing material with an aqueous, acidic solution containing effective concentrations of iron-c...
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WO/1996/007774A1 |
A process for the preparation of lead-zirconium-titanium (PZT) film and powder compositions. The process comprises the steps of providing an electrodeposition bath, providing soluble salts of lead, zirconium and titanium metals to this b...
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WO/1996/004407A1 |
A method of producing a non-metal element or a metal or an alloy thereof from a halide or mixtures thereof. The halide or mixtures thereof are contacted with a stream of liquid alkali metal or alkaline earth metal or mixtures thereof in ...
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WO/1995/032313A1 |
Fine tantalum powder of high surface area, high capacitance, low leakage and high breakdown voltage is produced by sodium reduction of highly dilute fluotantalate salt charges (32) at high reaction temperatures and stepwise additions of ...
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WO/1995/028503A1 |
An industrially realistic process for alkaline leaching of a titaniferous material is disclosed. The process comprises the following process steps: (I) leaching the titaniferous material with an alkaline leachant to bring impurities in t...
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WO/1995/028502A1 |
An industrially realistic process for upgrading of titaniferous materials is disclosed. The process comprises the following steps: (i) a pretreatment which has the effect of rendering silica amenable to leaching under the particular cond...
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WO/1995/026809A1 |
In a fluidized bed process having a bed of fluidized particulate material which is susceptible to having at least some of said particulate material being entrained in the gases exiting the bed, an improvement to reduce said entrainment w...
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WO/1995/025824A1 |
A method and apparatus for continuously producing metals such as zirconium, hafnium, titanium, niobium, vanadium, silicon and tantalum. The corresponding metal halide is reacted with a metallic reducing agent such as aluminum, calcium, m...
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WO/1995/024510A1 |
A process for facilitating removal of one or more impurities from titaniferous material containing the impurities in a form which is highly soluble in acid. The material is in turn leached with a sulphuric acid solution and with a hydroc...
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