| Patents for C01G 49 - Compounds of iron (8,643) |
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| 05/24/1994 | US5314124 Coal cleaning process |
| 05/18/1994 | EP0597694A1 Magnetic particles for magnetic recording medium and process for producing the same |
| 05/17/1994 | US5312602 Method for purifying iron oxide |
| 04/27/1994 | EP0593695A1 Method for the synthesis of mixed metal oxide crystalline powders |
| 04/27/1994 | EP0542829B1 Method for producing magnetic microparticles from metallocenes |
| 04/26/1994 | US5306411 Solid multi-component membranes, electrochemical reactor components, electrochemical reactors and use of membranes, reactor components, and reactor for oxidation reactions |
| 04/14/1994 | WO1994007797A1 A process for recovering alkali metal hydroxide from organic liquors |
| 04/14/1994 | WO1994007595A1 A process for pelletising particles of alkali metal ferrite |
| 04/14/1994 | CA2146031A1 A process for pelletising particles of alkani metal ferrite |
| 04/14/1994 | CA2145853A1 A process for recovering alkali metal hydroxide from organic liquors |
| 04/13/1994 | CN1085190A Method for producing solution of ferrous chloride and use thereof |
| 04/12/1994 | US5302306 Process for preparing polycrystalline ferrite materials and composites containing them |
| 04/12/1994 | CA1328421C Electrolytic cell and process for the reduction of a titanium and iron containing solution |
| 04/07/1994 | DE4301042C1 Treatment the sludge obtained from zinc leachant - to recover zinc, iron and manganese |
| 04/06/1994 | CN1084826A Producing method for new type crocus |
| 04/05/1994 | US5300268 Process for the manufacture of aqueous solutions of ferric chloride |
| 03/29/1994 | US5298654 Synthesizing and isolating guanidine oxalate, recrystallizing, dissolving in water, mixing above solution with metal salt and water solution, precipitating metal oxalate form solution |
| 03/23/1994 | EP0588691A1 Ceric oxide containing composition, its preparation and its use |
| 03/16/1994 | CN2158872Y Gas-liquid quick-reacting apparatus for production of polyiron |
| 03/15/1994 | US5294492 Acicular magnetic iron oxide particles |
| 03/15/1994 | CA1327698C Method of producing mixed metal oxide material, and of producing a body comprising the material |
| 03/09/1994 | CN1023935C Production process of hard-magnetic ferrite material by using open hearth dust as raw material |
| 03/03/1994 | WO1994004459A1 Preparation of nanophase solid state materials |
| 03/03/1994 | WO1994004263A1 Preparation of solid state materials |
| 03/03/1994 | CA2142701A1 Preparation of solid state materials |
| 03/02/1994 | EP0584146A1 Method for the desilification of aqueous inorganic solutions |
| 03/02/1994 | CN1083024A Process for preparing nanometer material of carburetted steel |
| 03/02/1994 | CN1023883C Catalyst for dehydrogenating organic compounds, process for its preparation and its use |
| 03/01/1994 | US5290697 Gram-positive bacteria; grows in aqueous saline solution; absorbs metal oxides in aqueous solutions |
| 03/01/1994 | CA1327342C Process for beneficiating particulate solids |
| 02/23/1994 | EP0583621A1 Process for producing acicular gamma iron (III) oxyhydroxide particles |
| 02/23/1994 | CN1082513A Method for producing synthetic ferric oxide red from magnetite |
| 02/22/1994 | US5288474 Process for the production of lead metal niobates |
| 02/15/1994 | CA2070910C Dewatering method |
| 02/09/1994 | CN1081653A Production method for polymeric ferrous sulfate using fume from steel making |
| 02/08/1994 | US5284642 Water treatment |
| 02/02/1994 | EP0581174A1 Methode for preparing magnetic ferrites of M-type |
| 02/02/1994 | EP0580974A1 Metal niobates and/or tantalates, process for their preparation and their use |
| 02/02/1994 | EP0580619A1 Process for producing hydrophobised double-layer hydroxide compounds. |
| 01/25/1994 | US5280836 Process for beneficiating particulate solids |
| 01/20/1994 | WO1994001361A1 Method and apparatus for making nanometer sized particles |
| 01/19/1994 | EP0504156B1 Ferrates of alcaline or alcaline earth metals, their preparation and industrial applications |
| 01/11/1994 | US5277368 Coal cleaning process |
| 01/09/1994 | WO1994019283A1 Soft ferrite raw material powder and sintered body thereof, and method for producing the same |
| 01/06/1994 | WO1994000606A1 Production of metals from minerals |
| 01/05/1994 | EP0335987B1 Process for producing chevrel compounds |
| 12/29/1993 | EP0575745A1 Process for the preparation of lead-metal-niobates |
| 12/15/1993 | EP0573610A1 Synthetic spinels and processes for making them. |
| 12/14/1993 | US5269843 Nitrobenzene reduction |
| 12/14/1993 | US5269841 Temperature-resistant black pigment, a process for its production and its use |
| 12/07/1993 | US5268159 Process for the production of storable, free-flowing hydrated ferrous sulfate |
| 12/01/1993 | CN1022909C Method for producing permanent-magnet ferrite materials from magnetitie ore |
| 11/30/1993 | US5266297 Liquid oxidizing method and apparatus |
| 11/24/1993 | EP0570693A2 Process for the preparation of acicular gamma iron III oxide |
| 11/23/1993 | US5264284 Fibrous composite metal hydroxide and process for the production thereof |
| 11/10/1993 | EP0568670A1 Regeneration of hydrochloric acid. |
| 11/10/1993 | EP0240529B2 Compositions of particulate magnetic oxides with a structure of the lacunar spinel type, preparation and application thereof |
| 11/03/1993 | CN1077993A Fluoride method for recovering Nd-Fe-B rare earth permanent magnet spent material |
| 10/27/1993 | EP0567373A1 Fluid hydrated ferrous sulfate and process for fluidizing polyhydrated metallic sulfates |
| 10/27/1993 | CN1022558C Method for separating ultrafine iron oxide from waste mother liquor from rutile production by dilute hydrochloric acid |
| 10/26/1993 | US5256242 Method of manufacturing ferrite crystals |
| 10/13/1993 | CN1077206A Method for preparing iron oxide red from iron slime |
| 10/12/1993 | US5252314 Method for producing coprecipitated multicomponent oxide powder precursors using guanidine oxalate as precipitating agent |
| 10/07/1993 | DE4211481A1 Cobalt-doped magnetic iron oxide pigment with high coercivity yield - produced by mass doping for quicker, simpler and cheaper epitaxial process |
| 10/06/1993 | CN1076914A Process and Unit for preparation of iron polysulfate |
| 10/05/1993 | US5250276 Method for preparing ferric chloride |
| 09/29/1993 | EP0562566A1 Method of manufacturing composite ferrite |
| 09/28/1993 | US5248497 Production of purified iron chloride by a vacuum process in the manufacture of titanium dioxide |
| 09/16/1993 | WO1993017959A1 Production of transparent cationically homogeneous refractory oxides of nanometer-scale particle size diameters at reduced temperatures |
| 09/14/1993 | US5244649 Hydrothermal treatment of aqueous suspension of iron/III/ hydroxide or oxide hydrate solids in presence of alkali metal hydroxide and aluminum and/or silicon compounds, two stages, increased normality of alkali in second stage |
| 09/14/1993 | US5244494 Producing iron oxide blast furnace feed pellets |
| 09/07/1993 | CA1321874C Reagents for magnetizing nonmagnetic materials |
| 08/31/1993 | US5240640 In situ use of gelatin or an aminodextran in the preparation of uniform ferrite particles |
| 08/31/1993 | US5240626 Colloidally dispersed magnetic particles coated with anionic antiagglomerant carboxy-functional polymer, dispersing aid of anionic auxiliary carboxy-functional polymer, nonionic surfactant, glycerol |
| 08/31/1993 | US5240493 Process for preparing submicron/nanosize ceramic powders from precursors incorporated within a polymeric foam |
| 08/26/1993 | DE4205634A1 Cobalt@-coated needle-like berthollide iron oxide pigments - used for magnetic recording purposes in audio tapes and having high saturation magnetisation |
| 08/26/1993 | DE4204892A1 Iron and zinc salts sepn. from acid etching soln. - by using organic extn. agent to remove zinc salt and sulphate ion producing agent to convert salt into insol. zinc sulphate, for pure prods. |
| 08/25/1993 | EP0557089A1 Sunscreen agents containing layered double hydroxides |
| 08/19/1993 | WO1993016000A1 Acid regeneration |
| 08/11/1993 | EP0555056A2 Magnetic iron oxide particles, a process for producing the same and a magnetic recording medium |
| 08/05/1993 | WO1993015019A1 Method for obtaining nitrides |
| 08/04/1993 | EP0553072A1 Synthetic porous crystalline material, its synthesis and use. |
| 08/03/1993 | US5232617 Process for the preparation of hexaferrites |
| 07/28/1993 | EP0552998A1 Process for reducing the introduction of droplets in an hydrogen stream |
| 07/27/1993 | US5231018 Rhodococcus cultured on fly ash for extraction of metal oxides with adsorption and agglomeration |
| 07/22/1993 | WO1993014022A1 Process of forming metal compounds using reverse micelle or reverse microemulsion systems |
| 07/21/1993 | EP0552133A1 Process for preparing submicron/nanosize ceramic powders from precursors incorporated within a polymeric foam |
| 07/20/1993 | US5229219 Magnetic recording medium comprising a magnetic layer containing a specified magnetic ferrite powder and having a curie temperature up to 180° C. |
| 07/20/1993 | US5229101 Containing lead and niobium |
| 07/20/1993 | US5228910 Particle size control |
| 07/14/1993 | EP0551216A1 Autogenous roasting of iron ore |
| 07/13/1993 | US5227283 Silver halide photographic material |
| 07/07/1993 | EP0550071A1 Method for manufacturing inorganic membranes by organometallic chemical vapor deposition |
| 07/03/1993 | CA2086402A1 Method for manufacturing inorganic membranes by organometallic chemical vapor deposition |
| 06/24/1993 | WO1993012550A1 Use of vanadium oxide iron and/or aluminium bronzes as a cathode material in electrochemical generators |
| 06/23/1993 | EP0532613A4 Ethylene sorbing substances |
| 06/22/1993 | US5221323 Method of producing magnetic powders from heavy metal sludges |
| 06/16/1993 | EP0546850A1 Metallic sulfates as wastewater clarificant and their preparation |
| 06/16/1993 | CN1021218C Process for preparation of ferric chloride from ferrous chloride |
| 06/15/1993 | US5219531 Production of concentrated aqueous solutions of ferric chloride |