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| Number | Title | Issue Date |
| 7429364 | Production of titania A sulfate process for producing titania from a titaniferous material is disclosed. The process includes leaching the titaniferous material and producing a leach liquor, precipitating iron sulfate from the leach liquor, solvent extraction of titanyl sulfate from leac... | 09/30/2008 |
| 7381398 | Titanium oxide powder, methods of manufacturing the same and barium titanate powder, dielectric ceramic, and multilayer ceramic capacitor A titanium oxide powder holding a barium compound on the surface of the particles thereof is used for manufacturing a highly crystalline fine barium titanate powder by solid-phase reaction. When the titanium oxide powder and a barium-containing powder material are m... | 06/03/2008 |
| 7371276 | Titanium dioxide pigment and method for producing the same and resin composition using the same The titanium dioxide pigment of the present invention contains an anatase type crystal in an amount of 98-100% and has an average particle diameter of 0.2-0.4 μm and a whiteness of 95-97 in terms of L value of linseed oil. The titanium dioxide pigment of the presen... | 05/13/2008 |
| 7326390 | Production of titania A sulfate process for producing titania from titaniferous material is disclosed. The process includes precipitating titanyl sulfate from leach liquors containing acidic solutions of titanyl sulfate. The process is characterised by: (a) multiple stage leaching to pro... | 02/05/2008 |
| 7138357 | Photocatalyst containing titanium oxide, the production method and use of the same The invention relates to a photocatalyst containing titanium dioxide, to a method for using it and to its application. A sulphurous titanium dioxide hydrate precipitate is precipitated from an acid titanium oxysulphate solution at a temperature below the boiling poi... | 11/21/2006 |
| 7008602 | Beneficiation of titaniferous ore with sulfuric acid Processes for the efficient and economical beneficiation of titaniferous ore are provided. A unique process for beneficiating ore comprising pretreatment of the ore by oxidation and reduction, followed by acid leaching with sulfuric acid has been developed. The acid... | 03/07/2006 |
| 6991677 | Titanium dioxide-calcium carbonate composite particles Titanium dioxide-calcium carbonate composite particles capable of realizing characteristic properties inherent in titanium dioxide such as a high opacity, a process for producing the same, and a complex composition or complex incorporated with the same are provided.... | 01/31/2006 |
| 6752973 | Process for producing titanium oxide A process for producing a titanium oxide is provided which comprises the steps of (i) mixing an acidic solution of a titanium compound with a nitrogen-containing basic organic compound to obtain a reaction product and (ii) calcining the obtained product. The titaniu... | 06/22/2004 |
| 6653356 | Nanoparticulate titanium dioxide coatings, and processes for the production and use thereof Nanoparticulate titanium dioxide coating produced by educing flocculates of titanium dioxide nanoparticles from a titanyl sulfate solution and dispersing the nanoparticles in a polar sol-forming medium to make a sol suitable as a coating usable to impart ... | 11/25/2003 |
| 6562313 | Electrode material for electrochemical capacitor, electrochemical capacitor comprising the same, and method for the production of the same An electrode material for an electrochemical capacitor having a large capacity, having a titanium oxide compound such as titanium oxide, hydrated titanium oxide or their hydrogenated products, and at least one oxidizable and reducible metal element contai... | 05/13/2003 |
| 6548039 | Processing aqueous titanium solutions to titanium dioxide pigment A hydrometallurgical process is provided for producing pigment grade TiO2 from titanium containing solutions. Generally, the solution is an aqueous solution. The process includes hydrolyzing the solution via complete evaporation in well-control... | 04/15/2003 |
| 6458452 | Titanium oxide particles, substrate for magnetic recording medium and magnetic recording medium using the same The present invention relates to titanium oxide particles having an average particle size of not more than 0.3 μm, and a BET specific surface area of 15 to 200 m2 /g, containing a soluble sodium salt of not more than 230 ppm, calculated as Na,... | 10/01/2002 |
| 6139816 | Process for the preparation of ultra-fine powders of metal oxides A novel process for the preparation of ultra-fine powders of metal oxide wherein a surfactant is added to the solution for the preparation of the metal oxide to provide nanometer metal oxide powders without the utilization of vacuum or high pressure condi... | 10/31/2000 |
| 6113873 | Stable anatase titanium dioxide and process for preparing the same To hydrous titanium dioxide obtained by hydrolysis of titanium sulfate was added a predetermined amount of a water-soluble aluminum compound and/or a water-soluble zinc compound, the mixture is calcined, and a suitable amount of aluminum and/or zinc is in... | 09/05/2000 |
| 6099634 | Fan- or disk-shaped titanium oxide particles, processes for production thereof and uses thereof A titanyl sulfate solution or a titanium tetrachloride solution is neutralized with an alkali to form orthotitanic acid, to which hydrochloric acid is added such as to adjust the TiO2 concentration to 80-140 g/L and the HCl concentration to 90-... | 08/08/2000 |
| 6074472 | Hydrolytic preparation of titanium dioxide pigments Titanium dioxide pigments are obtainable by complete hydrolysis of a hydrolyzable titanium compound at from 0 to 100° C. with intensive stirring and with setting of a pH in the range from 3 to 8 and maintenance of this pH within a range of 0.3 units. The... | 06/13/2000 |
| 5846511 | Process for preparing crystalline titania powders from a solution of titanium salt in a mixed solvent of water and alcohol The process for preparing crystalline titania powders is provided. The process comprises dissolving titanium salt in a mixed solvent of water and alcohol, heating the resulting solution to 15°~75° C. to form titanium hydroxide precipitates, and crystall... | 12/08/1998 |
| 5833892 | Formation of TiO2 pigment by spray calcination In a method of producing TiO2 pigment particles a TiOa Xb (OH)c -based precursor is suspended in a liquid with or without fuel additives. The suspension is then sprayed to form droplets. The droplets are transpo... | 11/10/1998 |
| 5630995 | Preparation of anatase titanium dioxide A process for preparing anatase titanium dioxide by precipitating hydrous titanium oxide in the absence of added nuclei from a solution of titanium sulphate containing the equivalent of 200 to 300 grams TiO2 per liter and having an acid to tita... | 05/20/1997 |
| 5527469 | Method for the preparation of desulfurized titanium oxide hydrolysate of high purity A titanium oxide hydrolysate slurry prepared by the sulfate process is treated with either an alkali metal hydroxide or an alkali metal carbonate to solubilize the sulfur bound to the titanium at a temperature of from 60° C. to 120° C. and the slurry is... | 06/18/1996 |
| 5468463 | Process for the preparation of very pure titanium dioxide A process for the preparation of very pure titanium dioxide by reacting titanium tetrahalides with sulphuric acid, hydrolysis the titanyl sulphate solution obtained and calcining the hydrolysate is disclosed wherein the reaction between titanium tetrahali... | 11/21/1995 |
| 5409679 | Process for the production of titanium dioxide The production of titanium dioxide by the sulphate process generates waste substances such as the wash filtrates, which are formed in the washing of titanium dioxide hydrate, and waste gases which contain sulphur dioxide. In this improved process the wash... | 04/25/1995 |
| 5277816 | Process for producing titanium dioxide A process for producing titanium dioxide which discharges no waste is disclosed. In a first step, a sulfuric acid solution containing titanium ion with one or more kinds of metal ions is contacted with a first organic solvent to extract the titanium ion a... | 01/11/1994 |
| 5264033 | Process for producing titanium dioxide pigment for photograph and photographic support comprising same Disclosed is a process for producing a titanium dioxide pigment used for a resin-coated paper type photographic support, comprising the following steps: (a) a step of adding at least one alkaline earth metal compound in an amount of 0.01-2.0% by weight in... | 11/23/1993 |
| 5229087 | Process for the preparation of titanium dioxide A process for the preparation of titanium dioxide by the sulphate process in which titanium raw materials are decomposed with sulphuric acid, the resulting titanyl sulphate is hydrolyzed, the waste acid is separated from the hydrolyzate and evaporated to ... | 07/20/1993 |
| 5173386 | Titanium dioxide aggregates process for producing same and electrophotographic photosensitive material containing same The present invention provides novel titanium dioxide aggregates especially suitable for an electrophotographic photosensitive material. This titanium dioxide aggregates comprise sintered aggregates of fine primary particles and have a rutile type crystal... | 12/22/1992 |
| 5169619 | Method of producing titanium oxides There is provided a method of producing titanium oxides which comprises: admixing an aqueous solution of titanium tetrachloride with sulfuric acid in a molar ratio of sulfuric acid to titanium tetrachloride of at least 0.5 adding an alklai to the resultan... | 12/08/1992 |
| 5147629 | Process for production of nuclei for use in titanium dioxide manufacture A process for the production of a suspension of nuclei has been developed in which an aqueous mixture of titanium tetrachloride, aluminium ions and hydroxyl ions is cured at at temperature of from 50° to the boiling point. The pH of the suspension before... | 09/15/1992 |
| 5094834 | Process for the production of TiO2 pigments In the production of TiO2 pigments by the steps of digesting titanium-containing raw materials with sulfuric acid, hydrolyzing the titanyl sulfate obtained, separating the waste acid from the hydrolyzate, bleaching the hydrolyzate and calcining... | 03/10/1992 |
| 5061473 | Titanium dioxide, a process and its production A titanium dioxide composition useful as the opacifier agent for vitreous enamels and fusion enamels comprises TiO2 predominantly in the form of isometric primary particles from 0.5 to 5.0 μm in size, which are aggregated to predominantly sphe... | 10/29/1991 |
| 5045301 | Moldable/extrudable titanium dioxide particulates Poorly crystallized or amorphous TiO2 particulates having a mean particle size greater than 20 nm are prepared by thermally hydrolyzing a titanium compound in solution, in the presence of at least one carboxylic acid containing a hydroxyl and/o... | 09/03/1991 |
| 4988495 | Process for the recorvery of sulphuric acid in the production of titanium dioxide A process for the preparation of an improved quality TiO2 pigment by hydrolysis of titanyl sulphate, isolation of the hydrolysis product form the waste acid produced during the hydrolysis, washing of the hydrolysis product and calcination of th... | 01/29/1991 |
| 4937062 | High surface area metal oxide foams and method of producing the same The present invention includes metal oxide foam particles and a method of making the same. A decomposable metal salt feed solution is injected into a hot atomizing gas. The mixture of hot atomizing gas and feed solution is maintained in the reactor until ... | 06/26/1990 |
| 4933153 | Method of preparing a synthetic rutile from a titaniferous slag containing magnesium values A synthetic rutile is prepared from a titaniferous slag, typically containing at least about 1.0 weight percent magnesium oxide and at least some portion of its titanium values as Ti2 O3, by a method comprising contacting the slag wi... | 06/12/1990 |
| 4902485 | Process for the production of titanium dioxide pigments A process for the production of TiO2 pigments by the sulfate process by digestion of titanium-containing raw materials with sulfuric acid, hydrolysis of the titanyl sulfate formed, purification of the hydrolyzate and calcination of the hydrolyz... | 02/20/1990 |
| 4505886 | Process for preparing high quality titanium dioxide A process for preparing high quality titanium dioxide which exhibits excellent reflectance and tint strength when incorporated into a coating formulation. The process involves the preparation of a seed solution wherein one of the seed curing factors of ti... | 03/19/1985 |
| 4388288 | Preparation of shaped titanium dioxide catalyst/carrier and catalysis of gaseous sulfur compounds therewith Shaped titanium oxide catalysts/carriers useful, e.g., for sulfur recovery via Claus catalysis, are prepared by (i) intimately admixing powdered, poorly crystalline and/or amorphous titanium oxide, said titanium oxide powder being characterized by a weigh... | 06/14/1983 |
| 4364908 | Method for purifying titanyl hydrate A process is provided for removing impurities from a slurry of titanyl hydrate. The titanyl hydrate is separated from the slurry, washed, and reslurried with water to make the resulting titanyl hydrate slurry fluid. The reslurried titanyl hydrate slurry i... | 12/21/1982 |
| 4268422 | Titanium dioxide hydrate of a particular structure and process of manufacture thereof A novel titanium dioxide hydrate is provided whose structure exhibits X-ray diffraction peaks at 24.6&#b1;0.4° and 48&#b1;0.4°, and which is suitable as an adsorbent material. A process for preparing the novel titanium dioxide hydrate also is provided w... | 05/19/1981 |
| 4095993 | Method for preparing polycrystalline fibrous TiO2 pigment A polycrystalline, fibrous rutile TiO2 pigmentary material having good optical properties and retention in paper, and exceptionally high tinting strength in latex paint systems is prepared by treating a substantially sulfate-free hydrous TiO | 06/20/1978 |
