| Patents for C01G 49 - Compounds of iron (8,643) |
|---|
| 08/08/1989 | CA1258180A1 Leaching process of zinc and iron containing sulphides |
| 08/03/1989 | DE3802236A1 Mixture of material for producing a metal chalcogenide and use of such a mixture |
| 08/03/1989 | DE3801430A1 Process for removing iron(III) from acid zinc salt solutions by solvent extraction |
| 08/01/1989 | US4853205 Supercritical fluid metal halide separation process |
| 07/12/1989 | CN1033786A Production technology of iron oxide yellow from waste iron and steel pickling liquor |
| 07/11/1989 | CA1257246A1 Fluidization aid for cohesive materials |
| 07/05/1989 | EP0323304A1 Composition comprising an oxide with a spinel structure, its use as a catalyst and process for obtaining it |
| 06/28/1989 | EP0322173A1 Pigment compositions |
| 06/28/1989 | EP0321747A1 Process for manufacturing and using granulated ferrous sulfate heptahydrate |
| 06/21/1989 | EP0321438A2 Piezoelectric crystal element, and method of making the same |
| 06/21/1989 | EP0320603A1 Iron blue pigment, process for manufacturing it and use |
| 06/15/1989 | WO1989005192A1 Process for beneficiating particulate solids |
| 06/13/1989 | US4839327 Method for the production of ultra-fine gold particles immobilized on a metal oxide |
| 06/06/1989 | US4837046 Spraying aqueous oxidizing agent solution on substrate in deoxidized atmosphere, simultaneously supplying aqueous deoxidized solution containing ferrous ions |
| 06/06/1989 | US4837002 Removal of chlorate from caustic soda |
| 06/06/1989 | US4836996 Mixing aqueous mixture comprising sodium oxide, silicon oxide, aluminum oxide and alkylated polymethylenediamine; roasting |
| 06/06/1989 | US4836956 Extraction of polyvalent metals with organodiphosphonic acids |
| 05/30/1989 | US4835049 Magnetic recording medium |
| 05/30/1989 | US4834898 Surfactants |
| 05/24/1989 | EP0316487A1 A process of preparing ferric sulfate solution |
| 05/23/1989 | US4832924 Phenolic crosslinking chelate resin |
| 05/18/1989 | WO1989004292A1 Process for the production of iron oxide having high reactivity and high specific surface |
| 05/09/1989 | US4827945 Magnetic resonance imaging |
| 05/02/1989 | US4826671 Preparation of acicular α-Fe2 O3 |
| 05/02/1989 | US4826537 Mannganese-aluminum iron oxide coatings |
| 04/26/1989 | EP0313282A2 Oxidation of metal (oxo)halides |
| 04/26/1989 | CN1032532A Using heating and roasting method producing coarse and fine ferric sulphatefrom slag of pyrite after the production of sulphuric acid |
| 04/25/1989 | CA1252995A1 Method for the preparation of fine hexagonal ferrite powders, in particular, for magnetic recording |
| 04/20/1989 | WO1989003368A1 Process for producing chevrel compounds |
| 04/19/1989 | EP0311838A2 Finely divided iron oxide black pigments, process for their production and their use |
| 04/19/1989 | CN1032466A Superconducting material and method of manufacturing same |
| 04/18/1989 | US4822509 Uniform particle size; mixture of gamma and ferrite crystal structure |
| 04/18/1989 | CA1252799A1 Dispersions of magnetic particles and dispersants therefor |
| 04/11/1989 | US4820417 Use of citric acid partial esters for the extraction of iron |
| 04/06/1989 | WO1989003111A1 Preparation of thin layers of iron iii oxide for optical and/or magnetic recording |
| 04/06/1989 | WO1989003110A1 Preparation of thin layers of iron iii oxide for optical and/or magnetic recording |
| 04/06/1989 | DE3732526A1 Process for preparing acicular (needle-shaped) alpha -iron(III) oxide hydroxide |
| 04/06/1989 | DE3732242A1 Process for treating residues containing non-ferrous metals |
| 04/05/1989 | EP0310223A1 Magnet composition |
| 04/05/1989 | CN1032260A Method of manufacturing superconductors and products |
| 04/04/1989 | US4818774 Organophosphorus compounds |
| 04/04/1989 | US4818436 Process and composition for providing reduced discoloration of pyrithiones |
| 03/29/1989 | EP0309323A1 Process of manufacturing superconductors and therewith obtained products |
| 03/29/1989 | EP0309322A1 Superconducting materials and process of manufacturing |
| 03/29/1989 | CN1031987A Technology and equipment for manufacturing magnetic powder by fluidbed reduction of iron oxide yellow |
| 03/29/1989 | CN1031986A Method for producing iron oxide red from iron borne soot of steel smelting |
| 03/29/1989 | CN1031985A Method for producing iron oxide red from iron borne soot of steel smelting |
| 03/28/1989 | US4816243 Hydrazine reducing agents |
| 03/22/1989 | EP0307486A2 Process for preparing an iron oxide |
| 03/22/1989 | CN1031859A Re-extraction by phase transfer in extracting of iron with acidic phosphate |
| 03/21/1989 | US4814158 From finely-divided ferric oxide, sulfuric acid and water in closed reaction vessel |
| 03/21/1989 | US4814106 Manufacture of a basic metal hydroxysulfate complex in solid form |
| 03/16/1989 | DE3729391A1 Process for the production of powder material |
| 03/15/1989 | EP0306973A2 Manufacturing method for superconducting ceramics and products thereof |
| 03/08/1989 | EP0306224A1 Iron oxide pigment showing golden color and process for producing the same |
| 03/08/1989 | EP0305747A2 Process and composition for providing reduced discoloration of pyrithiones |
| 03/07/1989 | US4810524 Plasma polymerization |
| 03/07/1989 | US4810402 Homogeneous mixture of required cations with thermally decomposable anion |
| 03/07/1989 | US4810401 Superparamagnetic solid particles |
| 03/07/1989 | CA1250732A1 Process for preparing an iron oxide |
| 02/28/1989 | US4808393 Process for manufacture of ferric nitrate |
| 02/28/1989 | US4808327 Compositions of particulate magnetic oxides with a defect spinel structure, preparation thereof and application thereof |
| 02/23/1989 | WO1989001521A1 Process for producing magnetic powder |
| 02/22/1989 | EP0304243A1 Production of ceramic powders by emulsion precipitation processes and the products thereof |
| 02/21/1989 | US4806335 Process for producing acicular iron α-oxyhydroxide particle powder |
| 02/21/1989 | CA1250210A1 Process for the treatment of iron- and zinc- containing hydrochloric acid pickles |
| 02/15/1989 | EP0303151A1 Fine-grained magnetic hexaferrite pigments containing boron, process for their production and their use |
| 02/15/1989 | EP0302912A1 Process for preparation of monodispersed barium containing ferrites |
| 02/09/1989 | WO1989000980A1 Method for the multistage, waste-free processing of red mud to recover basic materials of chemical industry |
| 02/07/1989 | US4803291 Particulate compositions of ferromagnetic metal oxalates in the form of submicronic acicular particles, the preparation of same and application thereof |
| 02/07/1989 | CA1249725A1 Recovery of chlorine |
| 02/01/1989 | EP0301700A1 Neutralization of sulfuric acid containing iron ions |
| 01/25/1989 | EP0300310A2 Process for producing particulate magnetic pigments of hexaferrite |
| 01/17/1989 | US4798622 High performance magnetic recording layer |
| 01/10/1989 | US4797331 Magneto-optical recording material |
| 01/10/1989 | US4797156 Metal treated by a solution containing ferric ferrous salt |
| 01/04/1989 | EP0297392A2 Process for preparing finely divided barium hescaferrite pigments from halide molten masses and use thereof |
| 01/04/1989 | EP0210244B1 Facetted nodular particles, their preparation and use |
| 12/27/1988 | US4793979 Process for chemical separation of phosphorus ore |
| 12/14/1988 | EP0294387A1 Method and apparatus for biological processing of metal-containing ores. |
| 12/13/1988 | CA1246320A1 Process for the treatment of the iron (ii) sulfate - containing dilute sulfuric acid solution obtained as the hydrolysis filtrate from the hydrolysis of titanyl sulfate solutions in the preparation of titanium dioxide |
| 12/06/1988 | US4789494 Magnetic recording media |
| 11/29/1988 | CA1245461A1 Precipitation of iron from sulphate solutions |
| 11/23/1988 | CN87103373A Recovery technique of iron oxide red and ammonia sulphate from waste liquid of pickle |
| 11/23/1988 | CN87102022A Preparation technique of hydrous ferrous sulphate |
| 11/22/1988 | US4786430 Glassy boron matrix |
| 11/17/1988 | EP0291416A1 Process for the reduction of a solution containing titanium and iron |
| 11/17/1988 | EP0290908A2 Pure colour iron oxide pigments, process for manufacturing them and their use |
| 11/16/1988 | CN86108450A Method for producing iron oxide red using soot from steelmaking |
| 11/15/1988 | CA1244815A1 Catalysts |
| 11/15/1988 | CA1244814A1 Iron oxide containing precursor to a catalyst |
| 11/09/1988 | EP0290263A1 Platelike magnetic powder and its manufacturing method and a recording medium which use the platelike magnetic powder |
| 11/08/1988 | US4783267 Method for stabilizing metal ions |
| 11/02/1988 | EP0289442A1 Iron oxide catalyst and method for making same |
| 11/02/1988 | EP0288819A1 Process for the preparation of dialkyldithiocarbamates of polyvalent metals |
| 11/01/1988 | US4781852 Magnetic recording media |
| 11/01/1988 | US4781580 Indirectly heated rotary tubular kiln |
| 10/25/1988 | US4780232 Process for preparing selected, doped magnetite/carbonate co-precipitates |
| 10/25/1988 | US4780140 Platelet-shaped iron oxide pigments |
| 10/11/1988 | US4777031 High temperature process for making fine magnetic particles |