88 results about "Titanic acid" patented technology

The invention provides a preparation method of prismatic titanium diboride powder, and belongs to the technical field of titanium diboride powder. The preparation method comprises the steps of titanium source preparation, boron source preparation, material mixing, cold isostatic pressing and carbon thermal reduction reaction. The step of preparing the titanium source comprises the following steps: heating TiO2 powder body liquid, raising the temperature to 52-55 DEG C, adding a tetrabutyl titanate solution, uniformly stirring, adding an ammonia water solution to adjust the pH value to 7.0, and carrying out heat preservation stirring for 2.7-3.2 hours to obtain the titanium source; the step of preparing the boron source comprises the following steps: adding B4C powder into absolute ethyl alcohol, carrying out ultrasonic dispersion, then adding a mixed solution, controlling the adding rate of the mixed solution to be 0.8-1.2 g / min, heating to 34-37 DEG C, and carrying out heat preservation and stirring for 3.8-4.2 hours to obtain the boron source; the titanium diboride powder obtained through the method is in a prism shape and is uniform in particle, high in density and purity and poor in high-temperature oxidation resistance.

The invention discloses a preparation method of high-purity titanium dioxide, which is characterized by comprising the following steps: (1) preparing a titanium solution: slowly adding a titanium tetrachloride solution into deionized water to obtain the titanium solution; (2) heat-preservation hydrolysis: adding an acidic dispersant into the titanium liquid obtained in the step (1), stirring and mixing uniformly at room temperature, heating to 80-85 DEG C, preserving heat, and carrying out hydrolysis reaction for 1-2 hours to obtain hydrolysis slurry; (3) obtaining a precursor: cooling, aging, filtering, washing and drying the hydrolyzed slurry obtained in the step (2) to obtain a metatitanic acid precursor; and (4) calcining: calcining the metatitanic acid precursor obtained in the step (3) at 400 DEG C to obtain the high-purity titanium dioxide. According to the preparation method of the high-purity titanium dioxide, provided by the invention, the high-purity (greater than or equal to 99.9%) titanium dioxide is prepared under mild process conditions of low-temperature hydrolysis and low-temperature calcination, the product yield reaches about 90%, and the obtained high-purity titanium dioxide is spherical titanium dioxide with a rutile structure and has good dispersity.

The invention provides an anion-doped perovskite type titanate material and a preparation method and application thereof, the structural formula of the anion-doped perovskite type titanate material is AxByTiOzN1-z, A is an alkali metal element, B is a rare earth element, N is an anion element, 0 lt; x is less than or equal to 1, 0lt; y < = 1, 0lt; z < = 4. The prepared anion-doped perovskite type titanate material is applied to a negative electrode of a lithium ion battery, and compared with a traditional perovskite type titanate material, the anion-doped perovskite type titanate material has better fast charging performance and power characteristics, ultra-long cycle life and excellent safety.

At least one embodiment of the invention provides a preparation method of sponge titanium, which comprises the following steps: pretreating bauxite tailings to obtain a first mixture; carrying out acid treatment on the first mixture, and filtering to obtain a second mixture; putting the second mixture into a reaction kettle containing an alkaline substance to react so as to convert the ferric titanate into titanate and ferric oxide or ferrous hydroxide to obtain a third mixture; carrying out suction filtration treatment on the third mixture to obtain a first solid phase and a first liquid phase, and drying and grinding the first solid phase; roasting the dried and ground first solid phase to form an iron elementary substance, and carrying out magnetic separation to remove the iron elementary substance; adding an acidic material into the first liquid phase for reaction to obtain metatitanic acid colloid, and washing the metatitanic acid colloid; the metatitanic acid colloid is subjected to calcination, chlorination reaction and replacement reaction in sequence to obtain the sponge titanium. The sponge titanium obtained through the preparation method is high in purity.

The invention relates to a lasting antibacterial photocatalyst particle and a preparation method thereof, and the preparation raw materials of the lasting antibacterial photocatalyst particle comprise the following components in parts by weight: 10-15 parts of butyl titanate, 5-10 parts of tetraethoxysilane, 1-2 parts of a rare earth compound, 8-15 parts of a silane coupling agent, 250-280 parts of absolute ethyl alcohol, 5-10 parts of industrial hydrochloric acid and 5-10 parts of deionized water. According to the photocatalyst particles, titanium dioxide serves as a core body, silicon dioxide serves as a shell layer, the silicon dioxide shell layer is of a mesoporous structure, and rare earth elements are distributed between the titanium dioxide core body and the silicon dioxide shell layer. Through the synergism of the titanium dioxide core, the porous silicon dioxide shell and the rare earth elements distributed between the core and the shell, the photocatalyst particles have the excellent effects of lasting and efficient antibacterial property and high stability.

The present application relates to the chemical industry, in particular to a kind of sulphuric acid method titanium white before kiln squeezing water recycling method and sulphuric acid method titanium white production process.The present application collects and recycles before kiln squeezing water in sulphuric acid method titanium white process, specifically recycling to bleaching and two washing procedures respectively, by the above-mentioned recycling, the collected before kiln squeezing water can be recycled completely, save bleaching pulp water while the percolation metatitanic acid is recycled to the flow, because the pulp after bleaching is washed by two washing, the soluble salt carried in before kiln squeezing water can be washed, so it will not affect subsequent salt treatment and calcination.In addition, by the recycling method of the present application, 1.5-2.0 t of water can be saved per ton of titanium dioxide, according to this calculation, 150-200 thousand tons of water can be saved in a 100,000-ton-per-year titanium dioxide production line, greatly saving the cost.

The application belongs to the technical field of auxiliary agent preparation, and provides a solidified material applied to copper-containing sludge flameless combustion process and a preparation method; firstly, iron nitrate nonahydrate, ferrous sulfate heptahydrate, manganese nitrate solution and citric acid are mixed to prepare ferrite precursor; further, rare earth phosphate nanodispersion is synthesized by a hydrothermal method, lanthanum nitrate hexahydrate and cerium nitrate hexahydrate are used as rare earth sources, ammonium dihydrogen phosphate and ammonium fluoride are introduced to provide phosphate and fluoride ions; meanwhile, multi-component co-doped amorphous powder is prepared by a sol-gel method, tetraethyl orthosilicate is used as a silicon source, zirconium oxychloride octahydrate, titanium acid tetrabutyl ester and niobium pentachloride are used as auxiliary materials, and a thermally stable amorphous oxide matrix is formed under high-temperature heat treatment to provide high-temperature mechanical properties; finally, kaolin or bentonite mineral powder is mixed with the above-synthesized ferrite precursor, rare earth phosphate nanodispersion, multi-component amorphous powder and other auxiliary agents, a slurry is formed, and the slurry is dried and formed into a solidified material.

The invention discloses a method for growing titanic acid / titanium dioxide nanoparticles on a titanium carbide Mxene sheet layer, and relates to a method for growing titanic acid / titanium dioxide nanoparticles on the surface of a titanium carbide Mxene sheet layer structure. The method comprises the following steps: firstly, etching titanium aluminum carbide at room temperature by adopting hydrofluoric acid to obtain a layered titanium carbide Mxene material, then dispersing the layered titanium carbide Mxene material in hydrogen peroxide with the mass percent concentration of 20-30%, simultaneously adding 0.6 ml of 65% nitric acid, and reacting for 24-72 hours at the temperature of 20-80 DEG C, so that titanic acid nanoparticles can grow on the surface of a titanium carbide Mxene lamellar structure; and subsequently carrying out heat treatment in an air atmosphere at 200-500 DEG C, and converting the titanic acid into anatase titanium dioxide. The preparation temperature is low without high pressure; the nanoparticles keep a lamellar structure aggregation state, and are expected to be applied to the fields of adsorption, photocatalysis and the like.

A method for preparing a nano-titanate, a nano-titanic acid and a nano-TiO2 containing embedded A nanoparticles is provided respectively. In this method, a Ti-T alloy with a A-group element solidly dissolved therein is used as a titanium source, and reacted with an alkali solution under a certain condition. In combination with subsequent treatment, the preparation of a titanate nanotube, a titanic acid nanotube, and a TiO2 nanotube / rod containing embedded A nanoparticles, respectively, is further achieved with high efficiency and low cost. Moreover, a method for preparing metal nanoparticles is also provided by removing the matrix of the composites. The present preparation methods is characterized by simple process, easy operation, high efficiency, low cost. The product is of promising application in polymer-based nanocomposites, ceramic materials, catalytic materials, photocatalytic materials, hydrophobic materials, effluent degrading materials, bactericidal coatings, anticorrosive coatings, marine coatings.

This application belongs to the field of inorganic chemical waste recycling and fluoride preparation technology, specifically relating to a method for preparing potassium fluorotitanate from hydrofluoric acid waste liquid. The method includes: S1. Pretreatment of hydrofluoric acid waste liquid and titanic acid powder; S2. Adding the pretreated hydrofluoric acid waste liquid and titanic acid powder to a reaction vessel to generate a fluorotitanic acid solution; S3. Adding potassium carbonate to the fluorotitanic acid solution to generate potassium fluorotitanate, followed by purification of the reaction solution to obtain potassium fluorotitanate crystals; S4. Washing and drying the potassium fluorotitanate crystals to obtain a high-purity potassium fluorotitanate product. This application uses titanic acid powder as the titanium source and optimizes reaction parameters to achieve the dual goals of resource recovery from hydrofluoric acid waste liquid and low-cost preparation of high-purity potassium fluorotitanate.

The application belongs to the technical field of biomedical materials, and relates to an ultrasonic-induced inorganic afterglow luminescent material for promoting repair of tissue and organ defects as well as a preparation method and application thereof, and comprises the following steps: S1, dispersing an afterglow luminescent material and citric acid in an aqueous solution to obtain a precursor solution for hydrothermal reaction; and S2, adding a titanium oxide-based material to the precursor solution provided in S1 to perform hydrothermal reaction in a reaction kettle to obtain a titanium oxide-based luminescent material loaded with the afterglow material; wherein the afterglow material is one or more of an aluminate-based afterglow luminescent material and a titanate afterglow luminescent material. Compared with the prior art, the ultrasonic-induced inorganic afterglow luminescent material prepared in the application is composed of titanium oxide and the afterglow material, and can produce afterglow luminescence under ultrasonic excitation. By loading microalgae with photosynthesis, oxygen supply to an oxygen-deficient bone defect site is controlled by ultrasonic waves, blood vessel regeneration is promoted, and efficient repair of the bone defect is realized.

The invention discloses a magnesium-based high-temperature-resistant filler for a rubber conveyor belt and a preparation method of the magnesium-based high-temperature-resistant filler, and belongs to the technical field of rubber fillers, magnesium phytate is deposited on the surface of brucite in situ through a coprecipitation method to obtain magnesium phytate and brucite composite powder, then a titanate coupling agent is uniformly grafted to the surface of the composite powder through a spraying process, and the magnesium phytate and brucite composite powder is obtained. Finally, the composite powder subjected to titanic acid esterification treatment and silane modified mica powder are subjected to high-speed mechanical mixing, and the magnesium-based high-temperature-resistant filler for the rubber conveying belt is obtained. The heat stability and flame retardance of the filler are improved through the magnesium phytate coating layer, the interface bonding force between the filler and a rubber matrix is achieved through the titanate coupling agent, the mechanical property and durability are synergistically enhanced with the help of the mica powder, and the key technical problems that a traditional brucite filler is easy to decompose at high temperature and poor in compatibility with rubber are effectively solved; the durability and the service life of the rubber conveyor belt under the high-temperature working conditions of metallurgy, mines and the like are obviously improved.

The application discloses a preparation method of a titanium dioxide coated MIL-53(Fe) electrocatalyst. First, a catalyst MIL-53(Fe) is obtained through a hydrothermal method, then the catalyst is heated, stirred and dried under mild conditions, and titanium dioxide obtained by hydrolysis of tetra-n-butyl titanate is uniformly coated on the MIL-53(Fe) under the action of dodecyl sulfate, finally, the catalyst is improved in contact with nitrogen through heat treatment, so that the titanium dioxide coated MIL-53(Fe) with good stability is prepared.

The application discloses a preparation method of titanium-doped and high-hydrated magnesio-chromian spinel monocrystal under high temperature and high pressure, and the method comprises the following steps: preparing a cylindrical magnesio-chromian spinel sample by taking solid basic magnesium carbonate powder, solid basic chromium acetate crystal powder, liquid tetraisopropyl titanate, solid oxalic acid powder, solid brucite powder, solid chromium hydroxide powder and liquid dilute nitric acid as starting raw materials; preparing water source sheets by taking brucite powder and chromium hydroxide powder with a weight ratio of 4:1 as water sources; placing two water source sheets at two ends of the cylindrical magnesio-chromian spinel sample and putting them into a double-capsule structure sample bin together to carry out high temperature and high pressure reaction, so as to obtain titanium-doped and high-hydrated magnesio-chromian spinel monocrystal; and the method solves the blank of the preparation technology of the titanium-doped and high-hydrated magnesio-chromian spinel large-grain monocrystal under the current high temperature and high pressure conditions, and obtains experimental samples of the titanium-doped and high-hydrated magnesio-chromian spinel large-grain monocrystal.

The application discloses a preparation method of battery-grade nanometer titanium dioxide, which comprises the following steps: dissolving a strong alkali weak acid salt as a pH regulator into ice water to make titanium salt completely hydrolyzed to prepare titanic acid; and using sodium hydroxide as the pH regulator to make the titanic acid further converted into a crystalline precursor to prepare a titanium complex [Ti(OH)4(OH)2] 0 Then, the complex is sheared and dispersed, and then subjected to a hydrothermal reaction; after the reaction is completed, the product is completely washed with water and calcined to prepare nanometer titanium dioxide. The prepared nanometer titanium dioxide has super-low impurity content, small particle size and uniform particle size distribution; the total content of magnetic substances, including Cr, Fe, Ni and Zn, is less than 0.2 ppm; the particle size is 0-100 nm; and the average particle size is 50 nm, so that the nanometer titanium dioxide is an excellent material for battery doping.

The invention discloses a preparation method of hydrolyzed metatitanic acid with narrow particle size distribution and a high-whiteness rutile crude product, and belongs to the technical field of sulfuric acid process titanium dioxide production. By prolonging the first boiling time, canceling gray point observation, performing staged speed regulation stirring and optimizing the pressure maintaining and curing process, hydrolysis process parameters are optimized, and a staged calcination system adaptive to the characteristics of the hydrolysate is designed, so that the particle sizes of the hydrolysate are concentrated, the content of fine particles is low, and a titanium dioxide product with narrow particle size distribution, high whiteness, low yellowness and stable quality is finally obtained. The problems of wide particle size distribution, serious fine particle loss, large product quality fluctuation, over-burning / under-burning caused by mismatching of a hydrolysate and a calcination system and poor finished product performance in a traditional hydrolysis process are solved. The proportion of the hydrolysate with the particle size smaller than 1 micron is reduced by 0.5%, the hydrolysis rate is increased by 0.15%, the L value of the calcined finished product is larger than or equal to 95.5, the b value is smaller than or equal to 2.7, the daily output is increased to 15 batches, and remarkable economic and technical benefits are achieved.

The application discloses a method for preparing metatitanic acid with stable particle size from concentrated titanium liquid in titanium dioxide production, and particularly relates to the technical field of titanium dioxide production. First, the concentrated titanium liquid and alkali liquid are respectively preheated to 85-95 DEG C, the concentrated titanium liquid is added into the alkali liquid, the temperature is maintained at 95-120 DEG C for reaction, the reaction time is 5-10 min, and the crystal seed is obtained when the detection of crystal seed stability reaches below 100 ml water / 10 ml titanium liquid; then the crystal seed obtained in step one is added into the concentrated titanium liquid, and the stirring, pressurizing and heating are carried out for reaction, the reaction time is 15-60 min, and the reaction is kept for maturation after the reaction is completed; finally, the titanium liquid after the reaction in step two is cooled, and metatitanic acid with stable particle size is obtained after filtration.

Provided are: coated flaky titanic acid particles, which can form a design coating film with a good silky texture and shadowed appearance when flaky titanic acid is applied to an organic solvent-based paint and, which can also sufficiently suppress discoloration (yellowing) of the coating film even in a relatively severe environment, such as prolonged exposure to ultraviolet light; and a production method therefor.　The surface of the flaky titanic acid particles has an oxide and / or hydroxide of aluminum, and an anionic surfactant present thereon. Preferably, the anionic surfactant is a hydrocarbon-based anionic surfactant having 5 or more carbon atoms in the main chain or a fluorinated anionic surfactant having 4 or more carbon atoms. Said production method comprises: a step for maintaining an aqueous slurry, which contains flaky titanic acid particles and an aluminum source, at a temperature of 50-95°C inclusive and at a pH of 5-12 inclusive to treat the surface of the flaky titanic acid particles with an oxide and / or hydroxide of aluminum; and a subsequent step for mixing the obtained flaky titanic acid and an anionic surfactant in a solution.

The application discloses a continuous hydrolysis system for sulfuric acid method titanium dioxide, which comprises a hydrolysis device, a temperature control pipeline, a metatitanic acid storage tank and a steam pipeline, wherein the hydrolysis device comprises a first preheating tank, a second preheating tank, a third preheating tank, a hydrolysis crystal seed preparation tank and a continuous mixing tank, the bottoms of the first preheating tank and the second preheating tank are communicated with the top of the hydrolysis crystal seed preparation tank respectively, and the bottoms of the third preheating tank and the hydrolysis crystal seed preparation tank are communicated with the top of the continuous mixing tank respectively; a pipeline heater and a pipeline cooler are sequentially connected between a first pipe opening and a second pipe opening of the temperature control pipeline, the first pipe opening is communicated with the continuous mixing tank, and the metatitanic acid storage tank is communicated with the second pipe opening. The application further provides a continuous hydrolysis method. The system and the method can convert the intermittent titanium liquid hydrolysis process into a continuous production, greatly improve the production efficiency, reduce the labor intensity of operation, and are favorable to promote the full-automatic production of the sulfuric acid method titanium dioxide.

The application discloses a nanosheet titanic acid / zeolite heterostructure catalyst and a preparation method thereof. The nanosheet titanic acid is used as a hetero-nucleation aid, and the nanosheet titanic acid / zeolite heterostructure catalyst is quickly prepared through a hydrothermal reaction. The mass content of titanic acid in the nanosheet titanic acid dispersion liquid is 9-10 wt.%. The nanosheet titanic acid with the hetero-nucleation effect is introduced to quickly nucleate and grow the molecular sieve. The nanosheet titanic acid as the hetero-nucleation aid promotes the nucleation and growth of the molecular sieve and forms the coating of the molecular sieve to limit the micro size of the molecular sieve, so that the specific surface area of the nanosheet titanic acid / TS-2 molecular sieve heterostructure catalyst is ensured, and the silicon / titanium ratio of the heterostructure is significantly reduced.

The application relates to the field of titanate, in particular to a preparation method of potassium titanate whisker and titanium dioxide whisker products. The preparation method of the potassium titanate whisker and the titanium dioxide whisker products is synthesized by adopting a high-temperature sintering and natural slow cooling process method, and the preparation method is characterized by the following steps: S1. mixing; S2. high-temperature sintering and melting; S3. solidification and crushing; S4. dilution decomposition adjustment conversion; S5. drying; and S6. high-temperature sintering setting. The application has low cost and complete whisker.

The present invention relates to a method for preparing a nano-titanate, a nano-titanic acid and a nano-TiO2 containing doping E or embedding E nanoparticles, and the use thereof. By using an E-doped Ti-T intermetallic compound as a titanium source, and reacting the E-doped Ti-T intermetallic compound with alkaline solution at atmospheric pressure and near its boiling-point temperature, an E-doped titanate nanofilm is prepared at atmospheric pressure with high efficiency and in a short time. Through acid treatment and (or) heat treatment, a titanate nanofilm containing embedding E nanoparticles, an E-doped titanic acid nanofilm, and a titanic acid nanofilm and a TiO2 flake powder containing embedding E nanoparticles can be further prepared. Through a subsequent reaction at high temperature and pressure, the preparation of an E-doped titanate nanotubes and titanic acid nanotubes, and titanic acid nanotubes and TiO2 nanotubes / nanorods containing embedding E nanoparticles can be achieved in high efficiency and low-cost.

The application discloses a method for preparing titanium liquid by VTM ironmaking waste slag and hydrolysis pretreatment, and belongs to the technical field of resource utilization of VTM ironmaking waste slag. The method is targeted at the significant difference in the composition of titanium liquid prepared from waste slag (blast furnace slag and gas-based shaft furnace slag) from different sources, and the titanium liquid meeting the requirements of the hydrolysis process is obtained through targeted treatment. Through the combined process of "MVR concentration, crystallization, separation, purification and drying", the aluminum sulfate impurities in the titanium liquid are efficiently removed, and are converted into high-value aluminum sulfate hexadecahydrate products. The application effectively solves the problems of aluminum impurities in the titanium liquid interfering with hydrolysis, low TiO2 yield caused by improper concentration of trivalent titanium and poor quality of metatitanic acid, realizes accurate regulation and control of the composition of the titanium liquid and resource utilization of impurities, provides qualified raw materials for subsequent efficient hydrolysis for preparing high-quality titanium dioxide, and is stable in process, economical and environmentally friendly.

This disclosure presents a red titanium dioxide heterojunction, its preparation method, and its applications, belonging to the field of materials synthesis and renewable clean energy utilization technology. The preparation method of the red titanium dioxide heterojunction includes: forming a first precursor of boron-doped titanium dioxide; calcining the first precursor at high temperature to obtain a second precursor of the boron-doped titanium dioxide heterojunction; mixing any one of (NH4)2TiF6, NH4TiOF3, and (NH4)2TiOF4 with the second precursor and then nitriding it in an ammonia stream to obtain a red titanium dioxide heterojunction uniformly doped with rutile and anatase phases. This disclosure utilizes ammonium fluorotitanate treatment to nitrid rutile titanium dioxide, forming a red titanium dioxide heterojunction uniformly doped with both rutile and anatase phases, exhibiting high water oxidation activity in photocatalytic water splitting reactions.

The invention discloses a high-barrier heat-shrinkable film and a preparation method thereof, relates to the field of packaging materials, and aims to solve the problems of high recovery difficulty of a composite film and low performance of a single-material film in the prior art. At least one of the rigid dihydric alcohols is cyclic dihydric alcohol. Furandicarboxylic acid or a derivative thereof is used as a main chain and is subjected to polycondensation with rigid dihydric alcohol, so that a dual-rigid structure can be formed, the glass transition temperature is increased, and high heat resistance and high stability are realized; the tetrabutyl titanate-zinc oxide composite catalyst has low heavy metal residue, can shorten the migration path of small molecules by improving the vacuum degree, and can be used for food and medicine packaging. The high-barrier heat-shrinkable film is made of a single-component material, and can be directly recovered in one way when being recovered after being used, so that the recovery is convenient.

The invention discloses a method for preparing high-whiteness magnesium hydroxide by removing impurities from brucite in the field of inorganic nonmetallic mineral processing. The method comprises the following steps: crushing brucite raw ore into superfine powder, and mixing the superfine powder with a dispersing agent to prepare slurry; adding a complexing agent to remove impurities through a flotation process; carrying out modification reaction on the floated slurry and a specially-made sulfydryl-carboxyl bifunctional silicon-titanium composite oxide under an alkaline condition; and finally, stabilizing through a coupling agent and drying to obtain a high-whiteness product. The modified substance is prepared from cyanopropyl silane and titanate through hydrolysis, conversion of cyano groups into carboxyl groups, sol-gel conversion and calcination, and the unique bifunctional structure of the modified substance can effectively recognize and coat coloring impurities. The process is simple and environment-friendly, and the obtained magnesium hydroxide product is high in whiteness, good in dispersity and suitable for the field of high-end flame retardant and composite materials.

The invention relates to the technical field of catalysts and dicyclopentadiene dioxide synthesis, and discloses an environment-friendly selective layered catalyst and a preparation method and application thereof, and the preparation method of the layered catalyst comprises the following steps: (A) providing a hydrotalcite precursor; (B) providing a peroxy titanic acid complex; and (C) carrying out second contact on the hydrotalcite precursor provided in the step (A) and the peroxy titanic acid complex provided in the step (B) in an inactive atmosphere, and then recovering a solid product. When the layered catalyst provided by the invention is used for preparing dicyclopentadiene dioxide through oxidation of dicyclopentadiene, the conversion rate of dicyclopentadiene and the selectivity of dicyclopentadiene dioxide can be remarkably improved.

A preparation method of a digestion solution for corrosion of tantalum-niobium-containing alloy waste comprises the following synthesis steps: taking a certain amount of halogenated iron salt, adding the halogenated iron salt into dilute halogen acid under high-speed stirring until the halogenated iron salt is completely dissolved, then adding hexafluorotitanic acid and titanyl sulfate solids according to a certain proportion to be completely dissolved, then adding excessive newly-prepared titanium hydroxide to react for a period of time, and finally adding a catalyst to react for a period of time; and filtering and adding graphite powder for later use. The decomposition method comprises the following steps: shearing and crushing the tantalum-niobium alloy-containing waste material to obtain the result; and adding the digestion solution into a small section with the diameter of 50 mm, heating to 40-70 DEG C, dropwise adding hydrogen peroxide, cooling the discharged gas, and enabling the condensed water to flow back to the system. Filtering after sampling and detecting that no metal exists, adjusting the filtrate to an initial state after analyzing components, adding a proper amount of sulfuric acid and hydrofluoric acid into a filter cake to adjust and dissolve until the filter cake meets the extraction requirement, and entering an extraction process line.