The National Titanium Dioxide Co. Ltd. (CRISTAL) Patent applications |
Patent application number | Title | Published |
20140154413 | SURFACE TREATMENT METHOD FOR MAKING HIGH DURABILITY UNIVERSAL TITANIUM DIOXIDE RUTILE PIGMENT - A method is provided for the wet surface treatment of titanium dioxide, in order to produce durable universal grade titanium dioxide rutile pigment with superior optical properties. The method is characterized in that, a hydrous zirconia and silica composite layer is co-precipitated at acidic pH. Then, a layer of alumina is precipitated under a range of pH required for complete precipitation above the initial composite layer. The upper pH limit of the slurry during the alumina precipitation can be well controlled to avoid any chance for dissolution or damage of the composite zirconia-silica layer formed. Zirconia-silica composite layers and alumina thus precipitated advantageously improve the competence of the layers formed over a TiO | 06-05-2014 |
20130302240 | METHOD FOR PURIFICATION OF SPENT SULFURIC ACID FROM TITANIUM DIOXIDE RUTILE INDUSTRY - A method for the purification of spent sulfuric acid and particularly the purification of spent acid, from titanium dioxide rutile manufacture through a chloride route, is provided. In the chloride route of titanium dioxide manufacture, sulfuric acid is used to clean the un-reacted gaseous flow coming out of the oxidizer, so the spent acid mainly contains un-reacted Ti | 11-14-2013 |
20120279849 | PHOTOCATALYST COMPRISING TiO2 AND ACTIVATED CARBON MADE FROM DATE PITS - A method is provided for adsorbing organic molecules, pollutants, or both, by contacting the organic molecules, pollutants, or both, with a photocatalyst. The photocatalyst can be made by a method that includes preparing activated carbon by calcining date pits to form a precursor material, and then impregnating the precursor material with titanium dioxide. | 11-08-2012 |
20120276389 | TITANIUM DIOXIDE NANOPARTICLES | 11-01-2012 |
20120115711 | PHOTOCATALYST COMPRISING TiO2 AND ACTIVATED CARBON MADE FROM DATE PITS - A photocatalyst is provided that comprises activated carbon produced from date pits, impregnated with TiO | 05-10-2012 |
20120114542 | PHOTOCATALYST COMPRISING TiO2 AND ACTIVATED CARBON MADE FROM DATE PITS - A photocatalyst is provided that comprises activated carbon produced from date pits, impregnated with TiO | 05-10-2012 |
20120111234 | CHLORIDE INGRESS-RESISTANT CONCRETE - An reinforced cementitious material structure is provided that includes a cementitious material made from an industrial waste byproduct from a titanium metal production process or from a titanium dioxide production process. The byproduct is used as a partial cement replacement. In some embodiments, the reinforced cementitious material structure can comprise a metal reinforcing structure in contact with a hardened cementitious material. The hardened cementitious material can comprise cement and the industrial waste byproduct. The cement can be used to make concrete and other cementitious material products for structural and non-structural uses, with little or no corrosion or other deterioration of an embedded metal reinforcing structure. | 05-10-2012 |
20120007023 | Sodium Silicate Solutions - A method is provided for treating silica sand scrubs (SSS) generated and accumulated as waste in the chloride manufacturing process of titanium dioxide pigment. A hydrothermal process is used to produce sodium silicate solutions of modulus 3.0 to 3.8, and precipitated silicas. In some embodiments, the process uses two specific principal reaction stages. A sodium silicate solution having a low SiO | 01-12-2012 |
20110229395 | PHOTOCATALYST COMPRISING TiO2 AND ACTIVATED CARBON MADE FROM DATE PITS - A photocatalyst is provided that comprises activated carbon produced from date pits, impregnated with TiO | 09-22-2011 |
20110135919 | CHLORIDE INGRESS-RESISTANT CONCRETE - An reinforced cementitious material structure is provided that includes a cementitious material made from an industrial waste byproduct from a titanium metal production process or from a titanium dioxide production process. The byproduct is used as a partial cement replacement. In some embodiments, the reinforced cementitious material structure can comprise a metal reinforcing structure in contact with a hardened cementitious material. The hardened cementitious material can comprise cement and the industrial waste byproduct. The cement can be used to make concrete and other cementitious material products for structural and non-structural uses, with little or no corrosion or other deterioration of an embedded metal reinforcing structure. | 06-09-2011 |
20110059315 | Methods of producing titanium dioxide nanoparticles - A method is provided for producing TiO | 03-10-2011 |
20100206198 | TITANIUM PRODUCTION WASTE BYPRODUCT AS PARTIAL CEMENT REPLACEMENT - An industrial waste byproduct from a titanium metal or a titanium dioxide production process can be utilized as a partial cement replacement. In some embodiments, the byproduct can comprise a byproduct from the production of titanium dioxide pigment from a sulphate process or from a chloride process. The cement can be used to make concrete and other cementitious material products for structural and non-structural uses, for example, grout, mortar, gunite, stucco, masonry, decorative stonework, bricks, blocks, roof tiles, floor tiles, cobblestones, pavers, combinations thereof, and the like. | 08-19-2010 |
20090087556 | Method for surface treatment of titanium dioxide pigment - A method of preparing coated titanium dioxide particles is provided wherein a zirconium oxide coating and an aluminum oxide coating are formed on the surface of titanium dioxide particles. The zirconium oxide-forming and aluminum oxide-forming coating materials can be used to control the pH of the surface treatment process without the need for adding pH controlling agents. | 04-02-2009 |