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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 |
| 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 |
| 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 |
| 6090354 | Process for the production of titanium oxide A process for production of titanium oxide comprises digesting an ilmenite ore in which at least 92% by weight of the iron which is present is in the ferrous form, if necessary adding a reducing agent and subsequently precipitating hydrous titanium oxide.... | 07/18/2000 |
| 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 |
| 5840111 | Nanodisperse titanium dioxide, process for the production thereof and use thereof The present invention relates to nanodisperse titanium dioxide, to a process for the production thereof and to the use thereof.... | 11/24/1998 |
| 5776239 | Hydrothermal process for making ultafine metal oxide powders An ultrafine titanium dioxide powder is disclosed that can be produced by hydrothermal treating an amino titanium oxalate composition. Ultrafine titanium dioxide powders are useful in cosmetic and other applications for controlling exposure to ultraviolet... | 07/07/1998 |
| 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 |
| 5443811 | Method of preparing titanium dioxide The invention relates to a method of preparing microcrystalline titanium dioxide, in which a) the solid titanium dioxide hydrate is treated with a base, b) the precipitate treated with the base is treated with hydrochloric acid, and c) the precipitate tre... | 08/22/1995 |
| 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 |
| 5370076 | Method of producing single crystal of KTiOPO.sub.4 A method of growing a single crystal of KTiOPO.sub.4 which is a nonlinear optical material is disclosed. Growth of the single crystal of KTiOPO.sub.4 is carried out by melting a KTiOPO.sub.4 material with a flux to produce a melt, then contacting a seed c... | 12/06/1994 |
| 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 |
| 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 |
| 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 |
| 5009879 | Titanium dioxide, a process for its production and its use 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... | 04/23/1991 |
| 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 |
| 4986742 | Process for the production of high-grade titanium dioxide by sulfate method High-grade titanium dioxide is produced by (a) reacting ilmenite or titanium-containing slag with sulfuric acid, (b) dissolving the material from (a) with water or dilute sulfuric acid, (c) separating insolubles from (b) to obtain a black solution containing titany... | 01/22/1991 |
| 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 |
| 4803064 | Process for preparing titanium dioxide in the form of spherical particles by hydrolysis of Ti(IV) A process for preparing titanium dioxide in the form of spherical particles having the particle size distribution indicated by dw/dnࣘ2, by hydrolysis of strongly acid solutions of Ti(IV), wherein the molar ratio SO4= /Ti(IV) is at ... | 02/07/1989 |
| 4781911 | TiO2 for ceramic frits and glazes A titanium dioxide compositon suitable for incorporation into ceramic frit, and process for preparation thereof. A clarified titanium sulfate liquor is hydrolyzed and precipitated to yield relatively large and uniform-sized hydrolysate particles which are... | 11/01/1988 |
| 4663131 | Process for the preparation of titanium dioxide In the preparation of titanium dioxide comprising autothermically digestion a titanium-containing raw material with sulphuric acid to form a solid relatively easily soluble digestion cake containing titanyl sulphate, extracting metal sulphates from this c... | 05/05/1987 |
| 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 |
| 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 |
| 4133864 | Process for preparing titanium dioxide Titanium dioxide of improved properties for use as a pigment is obtained by a process in which a non-concentrated acid solution containing not more than 200 grams of TiO2 per liter of solution is partially hydrolyzed and filtered; and additiona... | 01/09/1979 |
| 4098869 | Process for the hydrolysis of titanyl sulphate solutions Hydrolysis of a titanyl sulphate solution is carried out according to the autonucleation method of gradually adding the solution to a body of water at a substantially constant rate over 10-20 minutes, in such a way as to obtain an ionic concentration afte... | 07/04/1978 |
| 4082832 | Treatment of raw materials containing titanium Production of titanium dioxide which is characterized by recovery of reusable H2 SO4, highly pure Fe oxide and hydroxide and fractional recovery of Mn, V and Cr, etc., from FeSO4. nH2 O and waste acid of 20 - 40... | 04/04/1978 |
