47 results about "Titanium nitrate" patented technology

A vascular or endoluminal stent is adapted to be implanted in a vessel, duct or tract of a human body to maintain an open lumen at the site of the implant. The sidewall of the open-ended tubular structure of the stent is a base layer of a metal biologically compatible with blood and tissue of the human body. An intermediate metal particle layer of substantial greater radiopacity overlies the base layer, with particles bonded to the base layer and to each other to leave interstices therebetween as a repository for retaining and dispensing drugs or other agents for time release therefrom after the stent is implanted, to assist the stent in maintaining the lumen open. The particles are composed primarily of a noble metal—an alloy of platinum-iridium. The sidewall has holes extending therethrough, and the particle layer resides along the outward facing and inward facing surfaces, and the edges of the through holes and open ends of the sidewall. The larger particles are bonded to surfaces of the sidewall and progressively smaller particles are bonded to those and to each other up to the outer portion of the particle layer. Exposed surfaces of the particle layer are coated with ceramic-like iridium oxide or titanium nitrate, as a biocompatible material to inhibit irritation of tissue at the inner lining of the vessel when the stent is implanted. One or more anti-thrombotic, anti-platelet, anti-inflammatory and/or anti-proliferative drugs are retained in the interstices, together with a biodegradable carrier for time release therefrom. In an alternative embodiment, the intermediate layer is solid and the biodegradable carrier and drugs or agents therein are applied to the surface of the ceramic-like coating. Gene transfer is alternatively used to control tissue proliferation.

An atomic layer deposition method is used to deposit a TiN or TiSiN film having a thickness of about 50 nm or less on a substrate. A titanium precursor which is tetrakis(dimethylamido)titanium (TDMAT), tetrakis(diethylamido)titanium (TDEAT), or Ti{OCH(CH₃)₂}₄ avoids halide contamination from a titanium halide precursor and is safer to handle than a titanium nitrate. After a monolayer of the titanium precursor is deposited on a substrate, a nitrogen containing reactant is introduced to form a TiN monolayer which is followed by a second purge. For TiSiN, a silicon source gas is fed into the process chamber after the TiN monolayer formation. The process is repeated several times to produce a composite layer comprised of a plurality of monolayers that fills a contact hole. The ALD method is cost effective and affords an interconnect with lower impurity levels and better step coverage than conventional PECVD or CVD processes.

The invention provides an esterification method for synthesizing ethylene/propylene glycol ether carboxylate. A catalyst used in the method consists of an active substance and a carrier, wherein the active substance is tin salt (such as tin tetrachloride), titanium salt (such as titanium sulfate, titanium tetrachloride or titanium nitrate), zirconium salt (such as zirconium sulfate, zirconium tetrachloride or zirconium nitrate) or cerium salt (such as cerous sulfate, cerium tetrachloride or cerous nitrate); the carrier is silica gel, hydrogen-type ZSM-5, activated clay or diatomite; the content of the active substance in percentage by mass is 10 to 30 percent; and the content of the carrier in percentage by mass is 70 to 90 percent. The method has the advantages of inhibiting the occurrence of side reaction during production, improving the selectivity of target products, shortening production cycle, reducing investment in production equipment and avoiding the problems of production equipment corrosion, environmental pollution, high energy consumption and the like.

The invention discloses a preparation method of a compound catalyst for controlling the generation of bromate in the process of using ozone, characterized by using cerium nitrate and titanium nitrate as main raw materials, and carrying out pretreatment and then calcining to prepare the compound catalyst. According to the invention, by controlling the generation of hydroxy free radicals, the generation of bromate in the process of using ozone is controlled, and the bromate problem of influencing people health is solved; the control efficiency of the catalyst is high, the service life is long, the cost is low, no toxicity exists, and no influence on human health exists; simultaneously, in the process of ozone disinfection, the catalyst can effectively adsorb microbes and organic carboxylic acid in water, so as to raise the ozone disinfection effect and the removal rate of oxidized organic matters.

The invention relates to a process for preparing a denitrification catalyst. The process is characterized by comprising the following steps of: firstly, selecting and mixing powdered activated carbon or granular activated carbon which has the C content of more than 90 percent and the specific surface area of more than 1000 m<2>/g into an alcohol amine solution to obtain a suspension liquid for later use; secondly, dissolving a mixed solution of ammonium metavanadate, titanium nitrate and aluminium nitrate in the suspension liquid according to the mass ratio of 10-50 percent to form a sizing agent A; thirdly, dissolving a mixed solution of manganese nitrate, ferric nitrate and copper nitrate in the suspension liquid to form a sizing agent B, coating a carrier with the sizing agent A, drying to a constant weight and then heating to 530-570 DEG C under the protective atmosphere, and carrying out heat preservation for 3-5 hours and subsequently cooling to the room temperature at a temperature reduction speed; and finally, the sizing agent B is coated on the surface of the carrier obtained from the last step, the carrier is dried to a constant weight and then heating to 630-670 DEG C under the atmosphere containing 70 percent of N2, 20 percent of CO2 and 10 percent of CO, carrying out heat preservation and then cooling to the room temperature at a temperature reduction speed to achieve the catalyst in which pores and channels are communicated and are in a two-layer structure. The space velocity of the catalyst can be improved by more than 60 percent, and the resistance is reduced by more than 45 percent, so that a small-sized catalyst device is achieved.

A process for preparing the tetragonal nanoparticles of barium titanate includes such steps as preparing solution of titanium nitrate oxide, proportionally mixing it with the aqueous solution of barium nitrate, citric acid and ammonium nitrate, heating for becoming colloid by evaporation, and burning. Its advantage are high purity, easily controlled granularity, and low cost.

The invention discloses a low-temperature high-activity nano-composite catalyst for the methanation of a synthesis gas and a preparation method thereof. The catalyst comprises an active component, a carrier and a coagent, wherein the active component is nickel, the carrier is TiO2(Titanium Oxide) /[lambda]-Al2O3 (Alumina Oxide), and the coagent is metallic iron; the nickel and the metallic iron are in the present of the catalyst in a ferro-nickel way; and the catalyst comprises the following components in parts by weight: 5-30% of NiO (Nickel Oxide), 40-70% of [gamma]-Al2O3, 5-15% of TiO2 and 5-30% of Fe2O3 (Ferric Oxide). When the TiO2/ gamma]-Al2O3 composite carrier is prepared by the method provided by the invention, the nano-scale TiO2 prepared by a sol-gel method has the advantages of high surface uniformity, high dispersion and best heat stability, in comparison with titanium dioxide, which is easy to cluster and agglomerate, obtained by the impregnation and calcinations of titanium nitrate and the like through a traditional impregnation method.

The invention discloses a spherical core-shell structure TiO2/TiO2 material and a preparation method thereof and belongs to the field of nanocomposite. Titanium nitrate is used as a precursor, and by the combination of homogeneous precipitation process and calcination process, a titanium dioxide solid core is prepared. The surface of the solid core is coated with nano titanium dioxide particles/nanotubes, nanobelts and nanowires through a Pickering emulsion method, a porous shell layer is thus formed, and after high-temperature calcination, a core-shell type TiO2/TiO2 microsphere is obtained. The core-shell type titanium dioxide material is uniform and spherical, and the particle size of the materials is controllable; the microsphere can be used as a surfactant and has a UV photoresponse property. Compared with TiO2 nanoparticles, the photocatalytic performance of the material is stronger, and the recovery rate is high.

The invention relates to a production process of multiple aluminum zinc alloy hot-dipped on the surface of carbon steel, which comprises the following steps of: pickling, assisting in plating, drying, hot-dipping and passivating. Hot-dipping liquid comprises the following components in percentage by weight: 6-8 weight percent of aluminum, 1.2-2.5 weight percent of nickel, 0.5-1.2 weight percent of silicon, 0.5-1.5 weight percent of magnesium, 0.5-0.9 weight percent of manganese, 1.2-1.5 weight percent of titanium and the balance of zinc; and passivating liquid comprises the following components in percentage by weight: 0.3-0.5 weight percent of titanium nitrate, 1.2-2.0 weight percent of hydrogen peroxide, 0.3-0.6 weight percent of phosphoric acid and 0.8-1.2 weight percent of citric acid. With the adoption of the production process, a hot-dipping carbon steel material which is excellent in corrosion resistance and particularly is excellent in corrosion resistance under humid environment can be prepared, and a prepared passivating protective film is uniform, level and compact and can effectively prevent the isolation of corrosion environment from zinc coating and effectively restrain the corrosion.

The invention discloses an inorganic nano self-cleaning coating. The inorganic nano self-cleaning coating is weighed according to the following components in parts by weight: 60-100 parts of a photocatalyst mixed solution, 30-45 parts of a silicone acrylic emulsion, 15-20 parts of a fluorocarbon emulsion, 4-8 parts of a hydrophobic auxiliary agent, 3-13 parts of nano silicon dioxide, 5-10 parts ofpolysiloxane, 5-15 parts of anatase nano titanium dioxide, 1-5 parts of porous konilite, 10-15 parts of titanium tetrachloride, 5-10 parts of titanium nitrate, 2-5 parts of calcite, 1-2 parts of ethylene glycol, 0.5-1 part of a thickener, 1-3 parts of a film forming auxiliary agent, 1-2 parts of a dispersant and 30-40 parts of water. The adopted inorganic nano self-cleaning coating can achieve good self-cleaning effect, is not easily polluted by rainwater and contaminated by stains, avoids repeated cleaning, thereby avoiding consumption of a lot of manpower, material and financial resources and avoiding field high altitude operation, and having obvious social benefits.

The present invention discloses a porous silver-titanium composite catalyst preparation method, and belongs to the field of sewage treatment. The preparation method comprises: weighing silver nitrate, titanium tetranitrate and urea, and preparing into a solution, wherein a molar ratio of Ag<+> to Ti<4+> to urea is 2:1:10-4:1:10, and the total concentration of Ag<+> ions and Ti<4+> ions is 4-6 mol/L; carrying out crystallization on the prepared solution for 24-36 h at a temperature of 120-130 DEG C to obtain silver-titanium type hydrotalcite; adding the hydrotalcite to water to prepare a suspension liquid with a solid-liquid ratio of 1:30-1:50, adding an anion surfactant, and stirring for 2-3 h, wherein per g of the hydrotalcite is added with 1-2 mmol of the anion surfactant; and dissolving 30-60 mmol of aminopropyltriethoxysilane in 50 ml of absolute ethanol, adding the obtained solution to the hydrotalcite suspension liquid in a dropwise manner, carrying out solid-liquid separation, drying at a temperature of 90-105 DEG C, and carrying out calcination at a temperature of 450-550 DEG C to prepare the porous silver-titanium composite catalyst with characteristics of large specific surface area, absorption promotion, and good catalysis effect.

The present invention discloses a composite silver-titanium catalyst preparation method, and belongs to the field of sewage treatment. The preparation method comprises: weighing a certain mass of silver nitrate, a certain mass of titanium tetranitrate and a certain mass of urea, and preparing into a solution, wherein a molar ratio of Ag<+> to Ti<4+> to urea is 2:1:10-4:1:10, and the total concentration of Ag<+> ions and Ti<4+> ions in the solution is 4-6 mol/L; pouring the solution to a hydrothermal kettle, placing the hydrothermal kettle in an oven to carry out crystallization for 24-36 h at a temperature of 120-130 DEG C; cooling to a room temperature; carrying out suction filtration washing to achieve a neutral state; drying filter cake for 8-12 h at a temperature of 80-90 DEG C to obtain silver-titanium type hydrotalcite; and carrying out calcination on the silver-titanium type hydrotalcite for 3-4 h at a temperature of 450-550 DEG C to prepare the layered composite silver-titanium catalyst with characteristics of nanometer effect and absorption promotion.

The invention belongs to the technical field of ceramic fiber materials, and discloses a preparation method of a high-entropy oxide ceramic fiber material. The preparation method comprises the steps: preparing high-entropy oxide ceramic fibers through a template impregnation method, taking viscose as a template, and subjecting the viscose to vacuum impregnation in a metal nitrate mixed solution, wherein metal nitrate in the metal nitrate mixed solution is formed by mixing at least four of cerous nitrate, zirconium nitrate, yttrium nitrate, hafnium nitrate, titanium nitrate and lanthanum nitrate in equal molar mass; and after the impregnation,performing washing, centrifuging, drying and heat treatment to obtain the high-entropy oxide ceramic fiber. According to the preparation method, liquid-phase burdening is adopted, the method can guarantee that multiple metal elements are mixed uniformly, the prepared high-entropy oxide ceramic fiber material is uniform in morphology, the phase structure is of a fluorite type, and the proportion of elements contained in the fiber material is close to equal moles.

The invention provides a heat dissipation coating and a preparation method thereof, and belongs to the technical field of coatings. The preparation method comprises the following steps: reacting titanium nitrate, aluminum nitrate and copper nitrate with a complexing agent to form sol, heating to form xerogel, igniting to obtain metal oxide composite nano ceramic powder, reacting with ferrous sulfate and ammonium bicarbonate to obtain iron oxide coated metal oxide nano ceramic powder, and reacting with dopamine hydrochloride under the catalysis of a Tris-HCl solution containing Co ions to obtain the iron oxide coated metal oxide nano ceramic powder. And uniformly mixing the polydopamine-coated ceramic powder microspheres with silane coupling agent modified carbon nanotubes, organic silicon modified acrylic resin, urea resin, a dispersing agent and an auxiliary agent to obtain the heat dissipation coating. The heat dissipation coating prepared by the invention has the advantages of favorable mechanical properties, favorable heat resistance, favorable weather resistance, favorable chemical corrosion resistance, favorable flexibility, favorable elasticity and favorable film-forming property, has the functions of self-heat dissipation and far infrared release, and has wide application prospects.

The present invention relates to one kind of golden hard alloy, and features that the golden hard alloy consists of titanium nitrate 50-80 wt%, tantalum carbide 6-12 wt%, niobium carbide 4-10 wt%, Ni 7-20 wt%, Mo 2-5 wt% and C 1-3 wt%. The golden hard alloy has no need of electroplating to colorize causing environmental pollution, and no discoloring.

The invention provides an adsorbent for removing antimony in printing and dyeing wastewater and a preparation method and application thereof. The preparation method comprises the following steps: preparing a metal oxide by taking titanium nitrate and cerium nitrate as raw materials; then preparing amidoximation polyacrylonitrile by taking polyacrylonitrile fiber as a raw material; finally, takingacrylamide and N (4aminophenyl) acrylamide as raw materials for a polymerization reaction, adding metal oxide and amidoximation polyacrylonitrile fiber in the polymerization process, obtaining hydrogel, obtaining dry gel through aftertreatment, carrying out modification treatment, and obtaining the adsorbent, wherein the maximum adsorption capacity of the adsorbent on antimony in the printing anddyeing wastewater is high, and excellent cyclic utilization performance of the adsorbent is achieved.

The invention discloses an aluminum-alloy hollow tube extruding die based on PCVD processing. The aluminum-alloy hollow tube extruding die comprises a base body and 2-5 layers of coatings; the coatings are processed in a PCVD manner, the coatings are arranged at the preset positions of the base body, and the base body is sequentially wrapped by the coatings; and the coatings are independently formed by one of titanium nitrate, titanium carbide, titanium carbonitride, aluminum oxide and silicon nitride. The service life of the aluminum-alloy hollow tube extruding die is once to ten times of that of an aluminum-alloy hollow tube extruding die processed in a traditional surface nitriding manner. Thus, the service life of the aluminum-alloy hollow tube extruding die based on the PCVD processing is greatly prolonged.