236 results about "Zirconium compounds" patented technology

A surface treatment for metal materials obtained by incorporating an anionic water-dispersible resin (A) having a glass transition temperature of 0 DEG C or above and at least one member (B) selected from the group consisting of alkali metal silicates and basic zirconium compounds in water, wherein the alkali metal silicates have M2O/SiO2 mass ratios of 1/1000 to 6/10 with M being at least one element selected from the group consisting of lithium, sodium and potassium; a surface treatment process; and surface-treated metal materials. The invention provides a chromium-free surface treatment for metal materials which is useful for imparting excellent corrosion resistance, chemical resistance, thermal discoloration resistance and weather resistance to metal materials. Additional incorporation of one or more members selected from among silane coupling agents, vanadium compounds, titanium compounds, organophosphonic acids, polyhydric alcohol phosphates, inorganic acids, salts thereof, metal fluorides, and metal oxides brings about further improvement in the performance of the treatment.

A method of treating a metallic surface which comprises treating a metal-coated steel panel with a nonchromate metallic surface treating agent containing, in each liter thereof, (a-1) a silane coupling agent and/or a hydrolytic condensation product thereof, (a-2) water-dispersible silica in a proportion, and (a-3) a zirconium compound and/or a titanium compound, drying the treated steel panel and coating it with an anticorrosion coating agent containing, in each liter of an aqueous resin solution or dispersion, (b-1) a silane coupling agent and/or a hydrolytic condensation product thereof, (b-2) water-dispersible silica and (b-3) at least one phosphorus-containing ion selected from among phosphate ion, phosphite ion and hypophosphite ion.

A toner having a negative triboelectric chargeability is constituted by at least a binder resin, a colorant and an organic metal compound. The toner is characterized by: (a) the organic metal compound is an organic zirconium compound comprising a coordination or/and a bonding of zirconium and an aromatic compound as a ligand or/and an acid source selected from the group consisting of aromatic diols, aromatic hydroxycarboxylic acids, aromatic monocarboxylic acids, and aromatic polycarboxylic acids, (b) the binder resin is a resin selected from the group consisting of (i) a polyester resin and (ii) a hybrid resin component comprising a polyester unit and a vinyl polymer unit, (c) the binder resin has an acid value of 2-50 mgKOH/g, and (d) the toner contains a TFT (tetrahydrofuran)-soluble content providing a GPC (gel permeation chromatography) chromatogram exhibiting a main peak in a molecular weight range of 3,000-20,000 and including 3-25% of a component having molecular weights of at least 5x105.

An aqueous surface-treatment liquid is a treatment liquid containing a water-soluble zirconium compound, water-dispersive particulate silica, a silane coupling agent, a vanadic acid compound, a phosphoric acid compound, a nickel compound, and an acrylic resin emulsion in particular proportions. A surface-treated galvanized steel sheet produced using the treatment liquid is a galvanized steel sheet having a surface-treatment coating on a surface thereof, and the coating contains a zirconium compound, particulate silica, a silane-coupling-agent-derived component, a vanadic acid compound, a phosphoric acid compound, a nickel compound, and an acrylic resin in particular proportions. The amount of coating on a zirconium basis is 10 to 200 mg/m². This surface-treated galvanized steel sheet is chromate-free and has superior flat-portion corrosion resistance, blackening resistance, and appearance and corrosion resistance after press forming.

A process for producing a ceria-zirconia-alumina composite oxide is disclosed. The process comprises combining a cerium (IV) compound and a zirconium (IV) compound with a slurry of aluminum oxide at a temperature greater than 40° C. to produce a reaction slurry, then contacting the reaction slurry with a precipitating agent to precipitate insoluble cerium and zirconium compounds onto the aluminum oxide and form cerium-zirconium-aluminum oxide particles, and calcining the cerium-zirconium-aluminum oxide particles to produce a ceria-zirconia-alumina composite oxide. The process to produce ceria-zirconia-alumina composite oxides provides a material having a high oxygen storage/release capacity that is suitable for a catalyst with enhanced cleaning of the exhaust gases from internal combustion engines.

The present invention contemplates the addition of zirconium compounds to well known ceramic ballistic materials to increase resistance to penetration by projectiles. In the preferred embodiments of the present invention, the zirconium compound that is employed consists of ZrO₂ and is provided in the range of about 0.1% to about 11%, by weight, of starting material before densification. Preferred ranges of proportion of ZrO₂ in the finished ceramic material are in the ranges of about 0.30% to about 0.75%, by weight, or about 8-9%, by weight. The ballistic material using the combination of SiC with low volume of sintering aid and ZrO₂ raises the theoretical density of the ceramic material to between 3.225 and 3.40 g/cc, which is slightly higher than the typical 3.22 g/cc theoretical density for hot pressed fully dense SiC. The unexpected result that accrues through combining silicon carbide and zirconia consists of the creation of controlled defects in the finished ceramic that increase the surface area that is fractured during a ballistic event, enhancing spreading of the forces imposed on the ceramic material by a projectile and, as a result, the ability of the ballistic material to withstand higher forces while resisting penetration.

The present invention provides a catalyst for olefin polymerization having high olefin polymerization activity without being accompanied by generation of an adhered polymer on the wall of a polymerization reactor and the wall of pipe line and generation of a locking massive polymer, and capable of manufacturing an olefin polymer industrially and stably for a long period of time. That is, the present invention related to a catalyst for olefin polymerization comprising [A1] a hafnium compound or a zirconium compound having at least one conjugated 5-membered ring ligand, [A2] a zirconium compound having at least one conjugated 5-membered ring ligand but different from [A1], and [B] phyllosilicate, and relates to a method of polymerizing or copolymerizing olefin in the presence of the catalyst.

The invention provides a film-forming agent capable of obtaining a chemical conversion coating with very good corrosion resistance, hexavalent chromium or heavy metal is not contained, sewage treatment is simple, and no pollution is caused to the environment. An aluminum alloy nonferrous chromium-free film-forming agent contains at least one of water-soluble titanium compounds or water-soluble zirconium compounds, the content is 0.05-3.0g/L (according to metal ions), and the content of organic carboxylic acid is 0.1-1.0g/L. The film-forming agent further comprises 0.1-1.0 g/L of an accelerant and 0.02-5.0g/L of a sealing agent.

The invention discloses a silane-nanoceramic composite surface conditioning agent. The silane-nanoceramic composite surface conditioning agent is used for surface treatment before metal electrophoresis coating, and 1L of the composite surface conditioning agent comprises 100-100000mg of amino silane or epoxy silane, 1-10000mg of dispersible nanoparticles, 10-50000mg of a zirconium compound or a titanium compound, and the balance of water. The silane-nanoceramic composite surface conditioning agent does not contain phosphorus or other harmful elements, and has pollution to environment in the use process; and compared with present phosphorus-free surface conditioning agents allowing a treated metal to have a thin film on the surface and have poor physical bonding ability with an electrophoresis coating, the silane-nanoceramic composite surface conditioning agent allows a treated metal to have a thick film on the surface in order to enhance the physical binding ability with the electrophoresis coating, so the corrosion resistance and the throwing power of the electrophoresis coated metal are greatly improved.

Provided is a process for isolating zirconium peroxosulfate and its use, either as is or to prepare high purity zirconium compounds including powders of zirconium dioxide and stabilized zirconia. The process is based on precipitating a peroxide compound from an acidic peroxide solution of zirconium and provides a simple, economical method for producing the zirconium peroxosulfate powder and its derivatives with degree of zirconium recovery more than 99%. This process further provides an effective method for the separation and purification of zirconium from a variety of elements and/or naturally occurring ores.

The invention discloses a method for removing arsenic, antimony and bismuth from a copper electrolyte. The method is characterized in that a titanium or zirconium compound is converted into titanate or zirconate which is insoluble in water, has activity and is adopted as an active impurity removing agent through a hot alkali activation manner, the active impurity removing agent is utilized to react with acid in the copper electrolyte to generate a hydrous oxide in situ, and impurities like arsenic, antimony and bismuth are precipitated and removed. According to the method, the arsenic, antimony and bismuth in the copper electrolyte are efficiently removed under the precondition of no copper and nickel loss, solution loss of titanium or zirconium is remarkably reduced, generation of floating objects is avoided, and the active impurity removing agent can be circularly utilized.

The invention relates to a ceramic agent for surface treatment before a hot galvanized plate is coated. The ceramic agent comprises the following components in parts by weight: 5-15% of zirconium compounds, 10-20% of acid, 1-2% of complexing agent, 0.1-3% of silane coupling agent, 5-10% of film forming accelerant, 2-3% of stabilizer, 2-5% of colorant, 2-3% of corrosion inhibitor and the balance of water. The ceramic agent provided by the invention can be rapidly formed into an integrated ceramic film at normal temperature; the formed ceramic film is obviously light yellow and is easy to judge whether the ceramic film is formed on the surface of a workpiece or whether the ceramic film is integrated in an industrial production process; in addition, the formed ceramic film is better in corrosion resistance and stronger in stability as comparison with the ceramic film formed by using the currently used ceramic agent.

The invention describes processes for the production of basic aluminum compounds, including aluminum chlorohydrate, basic zirconium compounds, and basic aluminum zirconium compounds. The process produces products of a wide range of basicities. The products formed by the present invention are comprised of low molecular weight species characteristic of enhanced efficacy antiperspirant salt compositions. The products of this process are suitable for use as water purification agents, as binders in catalyst applications, and in antiperspirant applications. In addition, the invention is directed to the products made by the disclosed process.

The invention discloses a method for removing arsenium from a water body by a macroporous resin adsorption process, which comprises the following steps: pretreating a macroporous resin, and carrying out coprecipitation carrying treatment on a zirconium-compound-containing compound; and carrying out adsorption on a water body of which the trivalent arsenium or quintavalent arsenium content is 10-5000 mu g/L with the carried macroporous resin to lower the total arsenium content to less than 10 mu g/L. The resin can be recovered with NaOH, and the recovery rate of the resin is higher than 95%. The method has the advantages of high arsenium removal efficiency and simple technological operation, and can easily implement industrialization.

The invention relates to a zirconia composite alumina ceramic sintered body. The zirconia composite alumina ceramic sintered body comprises the following components in percentage by mass: 0.01-19.0 wt% of a zirconium-containing compound (calculated in the form of zirconium oxide), 0.01-1 wt% of a yttrium-containing compound (calculated in the form of yttrium oxide), 0.16-4.6 wt% of a silicon-containing compound (calculated in the form of silicon oxide), 0.035-1.0 wt% of a calcium-containing compound (calculated in the form of calcium oxide), 0.07-2.0 wt% of a magnesium-containing compound (calculated in the form of magnesium oxide) and the balance of aluminum oxide. According to the zirconia composite alumina ceramic sintered body, 3Y-ZrO2 is taken as an additive, and the synergistic effect of multiple toughening modes such as phase change toughening, microcrack toughening, internal crystal structure strengthening toughening and surface strengthening toughening is achieved; CaCO3, SiO2and MgO are used as sintering aids, the sintering temperature of the aluminum oxide ceramic is reduced through liquid-phase sintering, the sintering rate is increased, sintering densification is promoted, and an aluminum oxide substrate prepared from the zirconia composite alumina ceramic sintered body has good fracture toughness and bending strength.

The invention relates to a hot-dip aluminum zinc plate chromate-free passivation solution and a preparation method of a hot-dip aluminum zinc fingerprint resistant plate, and belongs to the field of hot-dip galvanized steel plates. The technical problems that environmental issues of an existing hot-dip aluminum zinc steel plate are outstanding, and the requirements of corrosion resistance, coatingperformance and fingerprint resistance on electric control cabinets, buildings and other industries cannot met. The hot-dip aluminum zinc plate chromate-free passivation solution is prepared from thematerials in parts by weight: 100 parts of water, 0.8-5.0 parts of a zirconium compound, 0.3-3.0 parts of a rare earth compound, 1.0-5.0 parts of a corrosion inhibitor, 1.0-5.0 parts of a silence coupling agent, 10-30 parts of a waterborne polyurethane emulsion and 5-20 parts of a waterborne organic emulsion. The hot-dip aluminum zinc plate chromate-free passivation solution is coated on the surface of a hot-dip aluminum zinc plate, and then the hot-dip aluminum zinc fingerprint resistant plate is obtained through drying and curing. The hot-dip aluminum zinc fingerprint resistant plate has excellent corrosion resistance, coating performance, fingerprint resistance, alkali resistance and water resistance.