Patents
Sitemap › C22 - Metallurgy; Ferrous or non-ferrous alloys; Treatment of alloys or non-ferrous metals › C22B - Production or refining of metals; Pretreatment of raw materials › C22B 34 - Obtaining refractory metals
Patents for C22B 34 - Obtaining refractory metals (6,435)
11/2003
11/27/2003US20030219367 Process for the utilization of vanadium in chromium ore as ammonium metavanadate
11/25/2003US6652819 Combusting the carbonaceous residues at 500-690 degrees C.; heating the residues at a specific temperature and oxygen partial pressure to obtain a tetravalent vanadium compound; leaching with sulfuric acid; basification to precipitate
11/20/2003US20030213338 Molybdenum metal
11/19/2003EP1362129A1 Porous metals and metal coatings for implants
11/12/2003EP1360339A1 Silicate binders including calcium bearing curing agent
11/12/2003EP1280593B1 Process for the purification of flue gas
11/06/2003US20030206842 Pretreatment to render silica amenable to leaching and an aqueous leach in the presence of an acid; conditions are such that silica that enters solution is not hydrolysed or precipitated as a silicate.
11/06/2003US20030206390 Powdered tantalum, niobium, production process thereof and porous sintered body and solid electrolytic capacitor using the powdered tantalum or niobium
11/04/2003US6641641 Method for producing metal or metal compound comprising process of treating with fluorine and adjusted raw material used therein
10/2003
10/30/2003WO2003089674A2 Acid beneficiation of ore
10/29/2003CN1452593A Ultracoarse, monocrystalline tungsten carbide and method for producing same, and hard metal produced therefrom
10/29/2003CN1451787A Electrochemical powder decomposing method and eleclrotyzer adapted for same
10/28/2003US6638336 Manufacture of cost-effective titanium powder from magnesium reduced sponge
10/23/2003US20030198591 Acid benefication of ore
10/23/2003US20030196902 In particular high melting alloys such as rhenium/tungsten alloys, rhenium/molybdenum alloys, rhenium/molybdenum/tungsten alloys, superalloys, and alloy systems containing noble metals
10/23/2003US20030196515 Process for producing metallic titanium
10/23/2003US20030196514 Process for producing titanium sponge
10/22/2003EP1354968A2 Process for electrochemical dissolution of high-melting point special alloy powders and electrolytic cell suitable therefor
10/22/2003EP0828552B1 Process for recovery of metal ions
10/21/2003US6635098 Low cost feedstock for titanium casting, extrusion and forging
10/17/2003CA2425504A1 Process for the electrochemical decomposition of powders and electrolysis cells suitable therefor
10/15/2003EP1352106A2 Tantalum and niobium billets and methods of producing the same
10/15/2003EP1080242B1 Tantalum-silicon alloys and products containing the same and processes of making the same
10/15/2003CN1449452A High purity niobium and products containing the same, and methods of making the same
10/09/2003WO2003048400A3 Process for the treatment of molybdenum concentrate also containing copper
10/07/2003US6629838 Endothermic heat treatment of solids loaded on trolleys moving in a kiln
10/01/2003EP1135537B1 Treating niobium and/or tantalum containing raw materials
09/2003
09/30/2003US6627165 Pretreatment for rendering silica amenable to leaching; aqueous leaching in the presence of an acid, such that silica forms solution and is not hydrolysed or precipitated as a silicate
09/30/2003US6626976 Heating a precursor material to a first temperature in the presence of a reducing agent; precursor material comprises nanoparticles of molybdic oxide (MoO3); hydrogen
09/24/2003CN1443618A Electron tube metal powder and its preparing method
09/18/2003WO2003076692A1 Minimising carbon transfer in an electrolytic cell
09/18/2003WO2003076690A1 Reduction of metal oxides in an electrolytic cell
09/18/2003WO2003076671A1 Methods to reduce hydrosulphide and arsine emissions during wet ore processing
09/18/2003US20030173394 System and filter for filtering hard alpha inclusions from reactive metal alloys
09/18/2003US20030173228 Reduction of metal oxides in an electrolytic cell
09/18/2003CA2479050A1 Minimising carbon transfer in an electrolytic cell
09/18/2003CA2478033A1 Methods to reduce hydrosulphide and arsine emissions during wet ore processing
09/12/2003CA2754650A1 Valve metal powders and process for producing them
09/11/2003US20030170158 Method for solubilizing metal values
09/11/2003US20030168131 High purity tantalum, products containing the same, and methods of making the same
09/10/2003EP1341939A1 Recovery of titanium dioxide from titanium oxide bearing materials like steelmaking slags
09/04/2003WO2003072505A1 Purification method for producing high purity niobium compound and/or tantalum compound
09/04/2003WO2003072504A1 Purification method for producing high purity niobium compound and/or tantalum compound
09/04/2003WO2003072503A1 Method of purifying niobium compound and/or tantalum compound
09/04/2003WO2003046258A3 A method for electrowinning of titanium metal or alloy from titanium oxide containing compound in the liquid state
09/04/2003US20030165419 Method for separating zirconium and hafnium tetrachlorides with the aid of a melted solvent
09/04/2003US20030165416 Methods to control H2S and arsine emissions
09/04/2003US20030165413 Precipitating in acid solution; centrifuging, filtration
09/03/2003EP1339884A2 Metal and alloy powders and powder fabrication
09/03/2003EP0517786B1 Production of synthetic rutile
08/2003
08/28/2003US20030161770 Controlling oxidation; slurry containing ammonium metavanadate; decomposition of ammonium sulfate to ammonia
08/27/2003WO2003072275A1 Wet method for treating petroleum-originated combustion ash
08/27/2003EP1337692A1 Intermetallic compounds
08/27/2003CN1438335A Method for separating hafnium from zirconium
08/27/2003CA2397941A1 Wet-processing method for combustion ashes of petroleum fuels
08/21/2003WO2003068693A2 Processes for treating iron-containing waste streams
08/21/2003WO2003068435A1 A process for preparing tantalum powder and/or niobium powder having high specific surface area
08/21/2003US20030154858 Flue gas is, contacted with a carbonaceous material( solid carbonaceous residue as by-product of synthetic rutile production from titaniferous ores)
08/14/2003WO2003066915A1 Metal recovery process
08/14/2003WO2003066914A1 High-purity spongy titanium material and its production method
08/14/2003US20030152503 Metal recovery process
08/14/2003US20030150818 Especially used in the processing of the waste streams from the chlorination of titanium-bearing raw materials and involve the use of certain combinations of neutralization and precipitation steps.
08/14/2003US20030150295 Ferroalloy production
08/13/2003EP1335031A1 Process for the treatment of metalliferous residues in petroleum tars gasification plants
08/07/2003US20030145682 Gel of elemental material or alloy and liquid metal and salt
08/06/2003EP1333110A1 Fabrication of metal articles by electrolysis of preshaped metal compounds in a fused salt
08/06/2003EP1332240A2 Methods of forming sputtering targets
07/2003
07/31/2003WO2003062492A1 Magnesium-zirconium alloying
07/31/2003WO2003062480A1 Reductive method for production of metallic elements such as chrome using a crucible with a perforated wall
07/31/2003WO2003062479A1 Method for production of metallic elements of high purity such as chromes
07/31/2003WO2003048399A3 Electrochemical processing of solid materials in fused salt
07/31/2003US20030143153 Plasma synthesis of metal oxide nanopowder and apparatus therefor
07/31/2003US20030143138 Extracting an aqueous feed mix comprising zirconium oxychloride and hafnium oxychloride and a thiocyanate salt with thiocyanate-containing organic solvent to produce a aqueous raffinate stream and organic raffinate stream
07/30/2003CN1433485A Production of nitrogen-containing tantalum or niobium powder and solid electrolytic capacitor
07/30/2003CN1433346A Nobium powder, sintered compact thereof and capacitor
07/24/2003US20030136685 Process for electrochemical decomposition of superalloys
07/23/2003EP1329526A1 High purity zirconium or hafnium, sputtering target comprising the high purity zirconium or hafnium and thin film formed using the target, and method for producing high purity zirconium or hafnium and method for producing powder of high purity zirconium or hafnium
07/23/2003EP1255872B1 Production of nitrogen-containing tantalum or niobium powder and solid electrolytic capacitor
07/17/2003US20030132559 Apparatus for producing molybdenum metal
07/17/2003US20030132123 Methods of forming titanium-based and zirconium-based mixed-metal materials
07/17/2003DE10155791C1 Verfahren zum elektrochemischen Aufschluss von Superlegierungen A method for the electrochemical decomposition of superalloys
07/15/2003US6592830 Treating niobium and or tantalum containing raw materials
07/10/2003WO2003056045A1 Chromium removal from leach liquors produced during high pressure acid leaching of lateritic ores
07/10/2003US20030130118 Method for manufacturing hydrorefining catalyst, and metal recovery method
07/10/2003US20030129113 Upgrading titaniferous materials
07/10/2003US20030126943 Reducing ilmenite continuously by a carbonaceous materialin a direct current transferred arc furnace having a refractory lining; estimating the thickness of the frozen lining as a function of temperature to control slag product
07/09/2003EP1324946A1 Ultracoarse, monorystalline tungsten carbide and method for producing the same, and hard metal produced therefrom
07/09/2003CN1113972C Tantalum-silicon alloy ingot and products contg. same, and producing method and use
07/03/2003US20030124040 Pressurization oxidation; separation; recovering copper
07/03/2003US20030121365 Method of producing fine tungsten powder from tungsten oxides
07/02/2003CN1112975C Method for treating matter containing chromium oxides in large scale, and method for utilizing after-treatment matter and utilizing matter
07/01/2003US6585800 Method for making molten metal
07/01/2003US6585033 Process for producing vanadium alloy foil
06/2003
06/26/2003WO2002061168B1 Methods of forming sputtering targets
06/25/2003CN1426487A Method for producing ferroalloy
06/25/2003CN1425524A Process for preparing niobic powder and/or tantalum powder
06/24/2003US6582493 Oxidizing the objects of thoriated tungsten to form thorium-containing or thorium-oxide-containing tungsten oxide pieces, homogenizing tungsten oxide pieces, and reducing homogenized tungsten oxide pieces under hydrogen gas
06/24/2003CA2244600C Production of titanium slag
06/19/2003US20030110890 Process for the production of high surface area tantalum and/or niobium powders
06/19/2003US20030110886 Reducing chromium oxide with silicon to obtain a molten metal, discharging slag produced and adding a basic flux to refine
1 ... 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 ... 65