49 results about "Titanium tetrachloride" patented technology

This invention relates to the field of catalyst technology, and discloses an inorganic-organic composite catalyst and its application, as well as a method for synthesizing acryloyloxyethyltrimethylammonium chloride. The catalyst preparation method includes: reacting a hydrolyzed siloxane coupling agent with titanium tetrachloride at a pH value less than or equal to 1.5. The hydrolyzed siloxane coupling agent is R-Si(OH)3, where R is a C8-C20 alkyl group, and the molar ratio of the hydrolyzed siloxane coupling agent to titanium tetrachloride is 0.07-0.15:1. This catalyst ensures synergistic effects of solubility and active sites, and exhibits high catalytic performance even at low dosages. In the synthesis of acryloyloxyethyltrimethylammonium chloride, it effectively improves the reaction efficiency and selectivity of acryloyloxyethyltrimethylammonium chloride, further increasing the yield and purity of acryloyloxyethyltrimethylammonium chloride.

This invention relates to the field of coating technology, specifically to a protective coating for stone surfaces with good waterproof performance and its preparation method, comprising the following steps: S1. Treating microcrystalline cellulose to obtain product 1 for later use; S2. Reacting product 1 from step S1 with titanium tetrachloride to obtain nano-titanium dioxide for later use; S3. Mixing the nano-titanium dioxide from step S2 with sodium oleate and adjusting the pH to 6.5-7.5 to obtain product 2 for later use; S4. Performing surface synergistic hydrophobic modification treatment on product 2 to obtain functional filler. This invention discloses a protective coating for stone surfaces with good waterproof performance, using fluorinated acrylic resin as the base resin, incorporating functional filler, and combining it with a curing agent, mixed solvent, defoamer, and leveling agent. Through the synergistic effect between the components, this protective coating for stone surfaces possesses good waterproof performance as well as good resistance to ultraviolet aging and acid corrosion.

This invention relates to the field of titanium chemical technology and discloses a refining process for crude titanium tetrachloride, comprising: feeding crude titanium tetrachloride and a vanadium removal agent into the bottom of a distillation column, mixing them in the bottom, and completing the vanadium removal reaction; the material in the bottom is extracted by a refining circulation pump and heated, then returned to the upper middle part of the bottom for in-situ flash evaporation, and the flash-evaporated liquid phase falls back to the bottom of the bottom; the titanium tetrachloride vapor generated by flash evaporation enters the purification section at the top of the distillation column for distillation separation, and the refined titanium tetrachloride gas generated at the top is condensed and enters a reflux tank, part of which is returned to the top of the distillation column to control the distillation purity, and the other part is output as qualified refined titanium tetrachloride product. This invention also provides a system for implementing this process. This invention solves the technical problem that traditional processes require multiple separate devices such as a circulation pump tank and a flash evaporation tank, making production operation and condition control difficult.

This application discloses a negative curvature polycyclic aromatic hydrocarbon containing an eight-membered ring, its synthesis method, and its application, belonging to the field of organic synthesis. The synthesis method uses a haloacenaphthene derivative as a starting material. First, a tetrahalogenated key intermediate containing an eight-membered ring is constructed via a titanium tetrachloride-catalyzed cyclization tetramerization reaction. Subsequently, this intermediate undergoes a cyclization coupling reaction with an alkyne compound in the presence of a palladium catalyst, silver salt, and phosphine ligand to generate a negative curvature polycyclic aromatic hydrocarbon containing an eight-membered ring. The synthesis method of this application avoids multi-step precursor synthesis, resulting in a concise process. It allows for the flexible introduction of functional groups such as trifluoromethyl and silyl groups, improving the solubility and processability of the material. The obtained product exhibits a non-planar configuration, a narrow optical band gap, and excellent electron transport properties, making it suitable for applications... n Applications include semiconductors, chiral optoelectronic materials, and nano-carbon materials.

This invention provides a method for preparing titanium dioxide by hydrolysis of titanium-containing waste residue, comprising the following steps: a hydrolysis step: mixing titanium-containing waste residue with water to hydrolyze titanium tetrachloride in the waste residue; a reduction step: adding a reducing agent to the hydrolyzed solution to reduce ferric iron in the solution to ferrous iron; a pH adjustment step: adjusting the pH value of the solution to obtain crude titanium dioxide precipitate; and a washing step: washing the crude titanium dioxide to produce the titanium dioxide product. This invention achieves the resource utilization of titanium in titanium-containing waste residue, with fewer production steps, and effectively improves the purity of titanium dioxide through reduction and washing processes.

This invention discloses a method for preparing a test solution for impurity content in titanium tetrachloride using the sulfuric acid method, and a detection method thereof, belonging to the field of component detection and analysis technology. The preparation and detection methods are as follows: water is added to the titanium tetrachloride sample and reacted until the precipitate dissolves and no more dense white fumes are produced; the obtained product is heated to dryness at a temperature not exceeding 100°C; then sulfuric acid solution and an appropriate amount of water are added, and the mixture is heated at a temperature not exceeding 200°C until the titanium matrix is ​​completely dissolved, obtaining a clear and transparent solution. This solution is diluted with water to a final volume, yielding a test solution for impurity content in titanium tetrachloride with a sulfuric acid concentration of less than 2%; the impurity content in the solution is determined using ICP-MS or ICP-OES. This invention is simple to operate, effectively avoids the risk of contamination by foreign elements, reduces operational errors, and thus greatly improves the accuracy and reliability of the analytical results.

The utility model provides a titanium tetrachloride refines with organic vanadium removal agent heating device, including the bucket body, the inside fixed mounting of bucket body has multilayer spiral type's steam heating tube, is provided with the heat preservation layer between steam heating tube and bucket body, the inside fixed connection of bucket body has vanadium removal agent storage tank seat, vanadium removal agent storage tank is located on vanadium removal agent storage tank seat, steam heating tube surrounds vanadium removal agent storage tank in. The both ends of steam heating tube are connected with steam inlet and steam outlet that extend to the outside of bucket body, are provided with steam gate valve and flowmeter on steam inlet, the top of bucket body is installed with sealed top cover, the below of bucket body is equipped with temperature sensor. The utility model discloses a steam heating tube to vanadium removal agent storage tank heating can realize the heating and heat preservation of vanadium removal agent storage tank, also can avoid the corrosion problem of steam overflow to the equipment of the scene, can realize the control of heating temperature simultaneously.

A novel circulating fluidized bed chlorination furnace system is disclosed. The outlet of the petroleum coke feed tank is connected in parallel to the lower inlet of the chlorination furnace via a discharge pipe. The bottom of the chlorination furnace also has multiple chlorine inlets and slag discharge ports. The chlorine inlets are connected to chlorine pipes, and the slag discharge ports are connected to slag discharge pipes. The top of the chlorination furnace has an outlet, which is connected to the side inlet of a high-temperature cyclone separator via a feed pipe. The top of the high-temperature cyclone separator also has a liquid discharge port, which is connected to the top of a low-temperature cyclone separator via a liquid discharge pipe. The top of the low-temperature cyclone separator also has a liquid outlet. This invention features a compact structure, convenient installation, stable operation, and is safe and environmentally friendly. The entire reaction system is fluidized, preventing slag discharge pipe blockage. The combined use of the high-temperature and low-temperature cyclone separators ensures multiple cycles, repeated combustion, and reaction of the titanium tetrachloride mixture.

This invention relates to the field of titanium tetrachloride preparation technology, and proposes a method for preparing titanium tetrachloride products. The method includes: filtering titanium tetrachloride raw materials to remove insoluble solid impurities, obtaining a pre-filtered liquid; adding a reducing agent and a catalyst to the pre-filtered liquid to react, causing vanadium-containing impurities to be reduced and precipitated, then separating the precipitate to obtain a vanadium-removed clear liquid; subjecting the vanadium-removed clear liquid to countercurrent extraction, and separating the liquid to obtain a purified clear liquid; sequentially passing the purified clear liquid through a light-water removal tower to remove impurities with boiling points lower than titanium tetrachloride, and through a heavy-water removal tower to remove impurities with boiling points higher than titanium tetrachloride, and obtaining the purified titanium tetrachloride product from the top of the heavy-water removal tower. This invention achieves deep removal of multiple types of impurities from titanium tetrachloride raw materials, can stably obtain titanium tetrachloride products with purity meeting the requirements of high-end fields, and has the advantages of high operational safety, low energy consumption, and ease of industrial implementation.

This invention relates to the field of pigment preparation, specifically to a method for preparing highly conductive titanium dioxide using the chloride process. The method includes: reacting oxygen and titanium tetrachloride with an oxidation reaction to generate titanium dioxide particles, which are then introduced into a cooling conduit. A preheated coating agent is added for a coating reaction and slurry preparation. The slurry temperature is adjusted to 60-75°C and the pH to 2-3, and a phosphate-containing compound is added. The slurry temperature is adjusted to 80-90°C, and a sodium aluminate solution and an alkaline solution are added to adjust the pH of the slurry to 9.5-10.5, followed by a first homogenization treatment. A tin chloride solution and a sodium aluminate solution are added, and the pH of the slurry is adjusted to 7.5-8.5, followed by a second homogenization treatment. The pH of the slurry is adjusted to 4.5-5.5, followed by a third homogenization treatment. The pH of the slurry is adjusted to 5.5-6.5, followed by a fourth homogenization treatment. This method is low-cost, simple, and suitable for large-scale production, producing conductive titanium dioxide with excellent performance.

The application discloses a catalyst for high-density polyethylene film production and a preparation method thereof, and belongs to the technical field of olefin polymerization catalysts. The catalyst takes active magnesium chloride as a carrier, loads titanium tetrachloride active components, and adopts a specific complex internal electron donor system. (1) Tetrahydrofuran and cyclohexanone are added as pre-coordination regulators during the preparation of magnesium chloride alcohol compound; (2) the alcohol compound is dispersed in titanium tetrachloride by means of atomization spraying for low-temperature titanium loading; (3) specific combined siloxane compounds and aromatic carboxylic acid esters are added in stages during the gradient temperature rising process, and ethyl benzoate is added in batches; (4) selective passivation washing is carried out by using a toluene solution containing ethyl acetate in the washing stage. Through the synergistic effect of the four steps, the generation of super-high-activity Ti 3+ centers is selectively inhibited, and the number of polymer "fish eye" defects is greatly reduced.

This application discloses a nano-tetragonal barium titanate and its process-enhanced continuous preparation method, belonging to the field of barium titanate preparation technology. The process-enhanced continuous preparation method for nano-tetragonal barium titanate includes the following steps: preparing a circulating mother liquor, a titanium tetrachloride acid hydrolysate, a barium chloride solution, and an ammonia solution; adding the titanium tetrachloride acid hydrolysate dropwise to the barium chloride solution to obtain a titanium-barium mixture; passing the titanium-barium mixture, the circulating mother liquor, and the ammonia solution into a microdroplet process-enhanced device for mixing and reaction; after heat preservation and aging, and solid-liquid separation, obtaining a mixed precipitate and a first filtrate; dissolving the mixed precipitate in a solvent, filtering to obtain barium oxalate tetrahydrate and a second filtrate; calcining the barium oxalate tetrahydrate to obtain nano-sized tetragonal barium titanate powder. By employing a microdroplet process-enhanced method, the titanium-barium mixture and the ammonia solution are dispersed into microdroplets smaller than 10 μm, enhancing the degree of material mixing, improving the mass transfer rate, and obtaining nano-barium titanate with small particle size and high purity.

The utility model discloses a kind of feeding devices for refining titanium tetrachloride, it is related to chemical equipment technical field, including mineral oil storage tank, for storing high viscosity mineral oil, the outside of mineral oil storage tank is equipped with steam jacket, steam inlet and steam outlet are equipped on the steam jacket;Coarse titanium storage tank, for storing coarse titanium tetrachloride;Mixing tank, the discharge outlet of mineral oil storage tank is communicated with the mixing tank by feeding assembly, the discharge outlet of coarse titanium storage tank is communicated with the mixing tank by first material transmission pipeline, the mixing tank is communicated with the feed inlet of rectification system by second material transmission pipeline, the second material transmission pipeline is used to send coarse titanium tetrachloride-mineral oil mixed solution into the rectification system.Upper described feeding device for refining titanium tetrachloride, realizes the technical effect of improving refining efficiency and product quality, reduces pipeline jamming risk, guarantees the stable operation of production.

This invention belongs to the field of titanium tetrachloride preparation technology, specifically disclosing a method for improving the quality of titanium tetrachloride produced by molten salt chlorination. The method includes: adding a mixture of titanium-containing raw materials and a carbon reducing agent into a chlorination furnace containing molten salt, and introducing chlorine gas into the furnace to react and generate flue gas containing titanium tetrachloride; at the flue outlet of the molten salt chlorination furnace, using cooled liquid titanium tetrachloride to counter-currently spray the generated flue gas; passing the sprayed flue gas sequentially through a dust collection device and a multi-stage condensation and scrubbing tower to condense and liquefy the titanium tetrachloride in the flue gas and separate it from impurities, obtaining a crude liquid titanium tetrachloride product; and installing a fan at the tail gas emission end, adjusting the fan's operating parameters to ensure the system consisting of the molten salt chlorination furnace, dust collection device, and multi-stage condensation and scrubbing tower operates under pressure control. This invention stably reduces the solid content in titanium tetrachloride to below 4 g / L, while effectively reducing the content of impurities such as Fe and Al, thus improving the quality of titanium tetrachloride.

The application provides a composite flocculant suitable for alkali reduction wastewater treatment and a preparation method thereof, and relates to the technical field of wastewater treatment; the method comprises the following steps: mixing magnesite tailings and sintered red mud according to a mass ratio of 1:3 and grinding to 200 meshes, and performing ladder calcination under the protection of nitrogen to obtain a magnesite-red mud mixture; a sodium silicate solution is adjusted to a pH of 3.5 by sulfuric acid, and after stirring to form a sol, titanium tetrachloride is added to perform temperature curing to obtain a prepolymer; hydrochloric acid is added to the magnesite-red mud mixture to perform reaction, and then calcium aluminate powder, the prepolymer and konjac glucomannan phosphate are added in sequence to perform stirring reaction; calcium hydroxide suspension liquid is added to adjust the alkalinity of the system to 75-80%, and after static curing, the composite flocculant is obtained; through the multi-metal cooperation of aluminum, iron, magnesium, titanium and calcium, a four-dimensional flocculation mechanism of "electric neutralization-precipitation-net capture-bridging" is realized, and the problem of easy gelation instability of traditional polysilicate aluminum salt is solved.

The application discloses a particle size control method of titanium dioxide, which comprises the following steps: adding sodium chloride into a mixed flow field of titanium tetrachloride and oxygen, wherein the sodium chloride reacts with the titanium tetrachloride and the oxygen to generate an intermediate and chlorine; with the reaction proceeding, the oxygen is gradually reduced, the chlorine is increased, and the intermediate reacts with the chlorine to generate sodium chloride and titanium dioxide again. The scheme provided by the application introduces an additive into a reaction system of titanium tetrachloride and oxygen, so that a rapid and severe exothermic reaction originally completed in one step is decomposed into two or more reaction step sequences. In this way, the huge reaction heat concentrated in an instant is dispersed into multiple stages and released gradually, so that the sharp accumulation of heat is fundamentally avoided, and the safe and stable control of the reaction exothermic rate is realized.

The application discloses a method for synthesizing dibenzyl-alpha,alpha-diphenylamine compounds, and belongs to the technical field of organic synthesis. The method uses aromatic dialdehyde, 2-cyclohexenone and benzylamine as raw materials, and carries out a heating reaction in an organic solvent in the presence of titanium tetrachloride. After the reaction is completed, an N,N'-dibenzyl-substituted dibenzyl-alpha,alpha-diphenylamine intermediate is separated and purified. The intermediate is subjected to hydrogenation and debenzylization by using Pd-C / H2, and after separation and purification, the dibenzyl-alpha,alpha-diphenylamine compound is obtained. The preparation process is mild and simple, and the problems of low chemical selectivity and low regioselectivity in traditional synthesis are avoided. In addition, the aryl compatibility of the aromatic dialdehyde is good, and the atomic economy is high, thereby providing raw material support for new drug screening and monomer synthesis of organic functional materials.

This invention belongs to the field of titanium nitride tungsten oxide composite films, and specifically relates to a method for preparing titanium nitride powder, titanium nitride tungsten oxide composites, and their composite films. A method for preparing titanium nitride powder includes the following steps: titanium tetrachloride is mixed with ethanol, nanocellulose, polyvinylpyrrolidone, tetrabutyl titanate, and ethanol; the mixture is heated and calcined; the calcined material is collected, ground, and placed in a plasma reaction vessel; after plasma arc discharge treatment, it is naturally cooled and then ball-milled to obtain titanium nitride powder. This application optimizes powder performance through component synergy and process integration. Simultaneously, it introduces tetrabutyl titanate, nanocellulose, and polyvinylpyrrolidone to construct a composite system, utilizing coordination and doping effects to regulate the microstructure of the powder from the source, effectively improving the dispersion stability and activity of the titanium nitride powder, laying a high-quality raw material foundation for the subsequent preparation of composites and composite films.

This invention relates to the field of toluene recovery and purification, and discloses a method for purifying toluene containing titanium tetrachloride. The method includes: i) washing the titanium tetrachloride-containing toluene with washing water under acidic or neutral conditions, separating it into a first oil phase and a first aqueous phase; ii) washing the first oil phase with washing water under pH 6-8 conditions, separating it into a second oil phase and a second aqueous phase; iii) washing the second oil phase with washing water under pH 7-8 conditions, separating it into a third oil phase and a third aqueous phase. The purification method for titanium tetrachloride-containing toluene provided by this invention has the advantages of low water and titanium compound residues, and the resulting water-washed toluene will not cause corrosion or blockage of distillation equipment when used for further distillation and purification.

The application discloses a coal combustion catalyst, a preparation method and application thereof, and belongs to the technical field of energy saving and environmental protection. The preparation method of the coal combustion catalyst provided by the application comprises the following steps: S1, dissolving a transition metal salt in an ethanol dispersion solution of titanium tetrachloride; S2, mixing and reacting the mixture obtained in the step S1 with a surfactant, and removing a solvent. The coal combustion catalyst prepared by the preparation method is a solid, is convenient to transport, has a small dosage and good catalytic performance. The application further provides the coal combustion catalyst prepared by the preparation method and the application of the corresponding coal combustion catalyst.

The application discloses a titanium-doped bismuth vanadate film photo-anode and a preparation method thereof. A precursor solution formed by mixing bismuth nitrate, an aqueous potassium iodide solution and an ethanol solution of benzoquinone is used as an electrolyte, fluorine-doped tin dioxide conductive glass (FTO) is used as a working electrode, a platinum sheet is used as a counter electrode, Ag / AgCl is used as a reference electrode, a bias voltage of -0.1 V vs. Ag / AgCl is applied to the working electrode, and a bismuth oxyiodide precursor film is deposited on the FTO. Then, a mixed solution of titanium tetrachloride and acetylacetone vanadyl dimethyl sulfoxide is added dropwise to the bismuth oxyiodide precursor film, and the titanium-doped bismuth vanadate film photo-anode is obtained through calcination and neutralization treatment. The titanium-doped bismuth vanadate film photo-anode has higher photoelectrocatalytic efficiency and charge transport efficiency, and can be widely applied to the fields of photoelectrocatalytic hydrogen production and photoelectrocatalytic degradation of pollutants.

This invention relates to the field of online exhaust gas detection technology, specifically to a pretreatment device for detecting titanium tetrachloride exhaust gas. The device includes an exhaust gas pipeline with a sampling pipeline connected to one side for sampling chlorination furnace exhaust gas. Along the gas flow direction, the sampling pipeline is sequentially equipped with a solid-liquid separation mechanism, a gas collection mechanism, and a real-time analysis mechanism. The solid-liquid separation mechanism includes several condensing plates for settling dust and condensing high-boiling-point compounds, and a connecting pipe for collecting low-boiling-point test gases. The gas collection mechanism includes a power component for generating negative pressure to draw in the low-boiling-point test gases and a storage tank for storing the low-boiling-point test gases. The real-time analysis mechanism analyzes the gas content corresponding to the low-boiling-point test gases in the storage tank and controls the power output of the power component based on the residual temperature inside the storage tank. This device reduces the content of dust and high-boiling-point compounds in industrial process exhaust gas, ensuring the accuracy of CO, CO2, HCl, and Cl2 gas content measurements in chlorination exhaust gas.

This invention discloses a hollow aluminum titanate ceramic fiber and its preparation method. The steps are as follows: Milkweed fiber is selected as a template, and ethanol is used as a solvent. The milkweed fiber is immersed in a mixed solution composed of aluminum nitrate, titanium tetrachloride, and yttrium nitrate. Titanium tetrachloride and aluminum nitrate penetrate into the milkweed fiber wall, and yttrium nitrate acts as a stabilizer. After immersion, the milkweed fiber is removed, drained, and dried to prevent uneven shrinkage and cracking during sintering. Then, sintering is performed at high temperature. The precursor in the milkweed fiber wall forms aluminum titanate, while the fiber decomposes and ablates at high temperature, leaving hollow aluminum titanate fibers. Finally, annealing is performed to obtain stable hollow aluminum titanate ceramic fibers. This invention has a simple and stable process, and the prepared fibers have high hollowness, good thermal shock resistance, and excellent thermal insulation performance, with lower thermal conductivity compared to conventional solid aluminum titanate fibers.

A method for producing an electrothermal film, its precursor solution, and related heating devices. The solution consists of tin tetrachloride (SnCl₄), titanium tetrachloride (TiCl₄), zinc oxide (ZnO)

The application discloses a high-yield preparation process of tetrachlorophthalic anhydride, relates to the technical field of organic synthesis, and comprises the following steps: dissolving phthalic anhydride in chlorosulfonic acid, adding into a chlorination kettle, adding a catalyst, then performing temperature rising according to a certain procedure, starting to pass in chlorine when the temperature in the reaction kettle rises to 80-100 DEG C, adjusting and controlling the flow of chlorine, reacting while stirring, absorbing tail gas by using lye, and stopping the reaction when there is substantially no HCl gas escaping; filtering the material, recovering the catalyst solvent, and ensuring that the distillation temperature is not higher than 220 DEG C; after cooling, washing with cold water, centrifugal dehydration, and drying at 150-170 DEG C, tetrachlorophthalic anhydride is obtained; wherein the catalyst is a modified montmorillonite supported titanium tetrachloride catalyst. The preparation process of tetrachlorophthalic anhydride provided by the application has high yield and high purity, and is easy to be industrialized.

The application discloses an ethoxymagnesium type titanium slurry polyethylene catalyst and a preparation method thereof, and belongs to the technical field of polyolefin catalysts. The preparation method of the ethoxymagnesium type titanium slurry polyethylene catalyst comprises the following steps: (1) mixing n-heptane and ethoxymagnesium microsphere carriers, and then heating to obtain a mixture; (2) dropping titanium tetrachloride solution into the mixture, and then adding an internal electron donor to react; and (3) after the reaction is completed, performing sedimentation, suction filtration and washing to prepare the ethoxymagnesium type titanium slurry polyethylene catalyst. That is, the high-temperature loading method is innovatively adopted, and the technical limitation is successfully broken - only the ethoxymagnesium microsphere carrier with a particle size of 15-20 mu can meet the performance requirements of the catalyst. The carrier with the particle size has significant industrialization advantages: the carrier can be directly prepared through a conventional production device, and the synthesis difficulty of superfine carriers is completely avoided.

This invention belongs to the field of high-purity titanium tetrachloride refining technology, specifically relating to a catalytic organic additive, its preparation method, and its application. The catalytic organic additive is composed of organic base oil, alkanes, cycloalkanes, aromatics, and metal oxides in a specific mass ratio, with the following mass ratios: 40–70: 2–10: 10–40: 5–10: 2–10; wherein the organic base oil is glycerol, the alkanes are naphtha, the cycloalkanes are cyclohexane, the aromatics are C9 aromatics, and the metal oxide is alumina. This invention enables the organic additive to possess excellent catalytic cracking performance; in the vanadium removal process of high-vanadium titanium tetrachloride, it can rapidly react with vanadium compounds, significantly improving vanadium removal efficiency while greatly reducing the unit dosage of the organic additive used for vanadium removal. It combines process applicability and economy, and is suitable for the refining stage of high-vanadium titanium tetrachloride in the production of titanium dioxide and sponge titanium.