METHOD FOR PRODUCING RUTILE-TYPE TITANIUM OXIDE SOL

• Main Authors: MURAKAMI, NATSUMI, KOYAMA, YOSHINARI, MIYAMOTO, AI
• Format: Patent
• Language: English; French; Japanese
• Published: 23.08.2012
• Subjects: ADHESIVES; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; CORRECTING FLUIDS; DYES; FILLING PASTES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS; INKS; INORGANIC CHEMISTRY; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING; NANOTECHNOLOGY; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; POLISHES; PREPARATION OF CARBON BLACK; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; USE OF MATERIALS THEREFOR; WOODSTAINS

[Problem] To provide a method for the efficient production of a rutile-type titanium oxide sol having excellent dispersibility wherein grain size as measured by dynamic light scattering is 5 to 100 nm. [Solution] A method for producing a rutile-type titanium oxide sol having a grain size as measured by dynamic light scattering of 5 to 100 nm comprises the following steps (a) and (b): Step (a): a step for preparing a titanium-containing aqueous solution having a concentration of 0.1 to 15 mass% in terms of TiO2 whereby an aqueous solution is prepared by mixing an aqueous tin oxalate solution, a titanium alkoxide, oxalic acid, a quaternary ammonium hydroxide, and water such that, per mole of titanium atoms, the ratio of tin atoms is 0.1 to 0.8 mol, the ratio of oxalic acid is 0.01 to 5 mol, and the ratio of quaternary ammonium hydroxide is 0.1 to 3.5 mol; and Step (b): a step for hydrothermal treatment, at 100 to 200ºC, of the titanium-containing aqueous solution obtained by step (A). [Problème] Décrire un procédé pour la production efficace d'un sol d'oxyde de titane de type rutile ayant une excellente dispersibilité, dans lequel la taille de grain telle que mesurée par diffusion dynamique de la lumière est de 5 à 100 nm. [Solution] La présente invention concerne un procédé pour produire un sol d'oxyde de titane de type rutile ayant une taille de grain telle que mesurée par diffusion dynamique de la lumière de 5 à 100 nm qui comprend les étapes suivantes (a) et (b) : étape (a) : une étape pour préparer une solution aqueuse contenant du titane ayant une concentration de TiO2 de 0,1 à 15 % en masse de telle manière qu'une solution aqueuse soit préparée par mélange d'une solution aqueuse d'oxalate d'étain, un alcoxyde de titane, de l'acide oxalique, de l'hydroxyde d'ammonium quaternaire, et de l'eau de sorte que, par mole d'atomes de titane, le taux d'atomes d'étain soit de 0,1 à 0,8 mole, le taux d'acide oxalique soit de 0,01 à 5 moles, et le taux d'hydroxyde d'ammonium quaternaire soit de 0,1 à 3,5 moles et étape (b) : une étape pour traitement thermique, à une température de 100 à 200 °C, de la solution aqueuse contenant du titane obtenue par l'étape (A).