37 results about "Titanium sulfate" patented technology

The invention discloses a plant-based deodorant and a preparation method thereof, and relates to the technical field of high polymer materials. When the plant-based deodorant is prepared, beta-cyclodextrin reacts with paratoluensulfonyl chloride and then reacts with ethylenediamine, and amino modified cyclodextrin is prepared; the plant-based extract is subjected to inclusion with amino modified cyclodextrin, and a cyclodextrin inclusion compound is prepared; the preparation method comprises the following steps: reacting hydroxyethyl cellulose with methacrylic anhydride to prepare double-bond modified cellulose; carrying out hydrothermal reaction on titanium sulfate, the carboxylated multi-walled carbon nanotube, ammonium fluoride and cerous nitrate to prepare a co-doped titanium dioxide / carbon nanotube; coating the co-doped titanium dioxide / carbon nano-tubes with oleic acid to prepare modified nano-particles; and reacting the double-bond modified cellulose with the cyclodextrin inclusion compound, and then copolymerizing with the modified nanoparticles and the comonomer to obtain the plant-based deodorant. The prepared plant-based deodorant has the advantages of good deodorization effect, slow release and photocatalytic degradation.

The invention provides a preparation method and application of a plasma-assisted catalyst for preparing methanol through CO2 hydrogenation, and belongs to the field of catalysts. Raw materials adopted by the method comprise biomass, metal salt and a precipitator, the molar ratio of the biomass to the metal salt is (0.05-1): 1, the biomass is one of chitosan, hyaluronic acid and alginic acid, and the metal salt is one or more of indium nitrate, cobalt nitrate, zirconium nitrate, zirconyl nitrate, titanium sulfate and aluminum nitrate; the catalyst is subjected to nitrogen doping and / or more oxygen vacancy metal interfaces are formed through combination of coprecipitation and plasma treatment, so that the carbon dioxide adsorption and activation capacity and the overall hydrogenation efficiency of the catalyst in the process of preparing methanol through carbon dioxide hydrogenation are effectively improved.

The application relates to a low-cost surface titanium doping method of a lithium-rich positive electrode material and belongs to the field of lithium ion battery positive electrode materials. Specifically, the method comprises the following steps: placing the positive electrode material into a solution with a specific pH, then continuously stirring and adding a titanium sulfate solution into the solution; filtering the solid powder obtained after reaction for a certain time, drying, and sintering at high temperature to obtain the titanium surface-doped positive electrode material. The lithium-rich positive electrode material prepared by the method has improved first circle coulomb efficiency, discharge specific capacity and cycle performance, the process is simple, the cost is lower than that of an organic titanium source, the method is suitable for large-batch treatment of the lithium-rich positive electrode material, the use demand of the power battery can be met, and the method has a good application prospect.

This invention discloses a method for preparing a strontium titanate modified layer on the surface of zirconia based on an impregnation-heat treatment method, comprising: (1) mixing titanium sulfate, urea and water to obtain a precursor liquid A, placing zirconia ceramic in the precursor liquid A, heating to boiling and maintaining for a period of time, then removing the zirconia ceramic, and after heat treatment A, preparing a titanium dioxide film on the surface of zirconia; (2) mixing H2O2 aqueous solution, ammonia and deionized water, adding metatitanic acid and stirring to dissolve, obtaining a precursor liquid B, placing the zirconia with the titanium dioxide film in the precursor liquid B, and allowing it to stand and react for a period of time at room temperature, depositing zirconia modified with a titanium dioxide precursor layer; (3) dissolving strontium acetate, or a mixed salt composed of calcium acetate and / or magnesium acetate and strontium acetate in deionized water to obtain an impregnation treatment solution, placing the zirconia modified with the titanium dioxide precursor layer in the impregnation treatment solution, allowing it to stand and react for a period of time, and then removing it, and after heat treatment B, preparing a strontium titanate modified layer on the surface of zirconia. The strontium titanate layer prepared on the surface of zirconia ceramic in this invention is tightly attached to the zirconia substrate and has high hydrophilicity, which is conducive to the adhesion of proteins and cells in the human body. At the same time, it can release active factors such as strontium ions for a long time to promote bone formation and bone regeneration at the implantation site, ultimately enhancing the osseointegration capacity of the zirconia implant.

The invention discloses a preparation method of a high-efficiency hydrogenation catalyst, which comprises the following steps: preparing silicate by using tetrapropylammonium hydroxide as a template agent and tetraethoxysilane as a silicon source, and carrying out alkali treatment to obtain a hollow silicate material; 3-aminopropyltriethoxysilane is adopted to treat the hollow silicate carrier, and a functionalized hollow silicate material is obtained; the preparation method comprises the following steps: loading cerium by taking a functionalized hollow silicate material as a carrier, and then adding into a mixed metal salt solution of nickel nitrate hexahydrate and titanium sulfate for coprecipitation treatment to obtain a catalyst precursor; mixing ethanol and tetrahydronaphthalene, adding sodium borohydride, stirring until the sodium borohydride is dissolved to obtain a mixed solvent, adding the catalyst precursor, transferring the mixed solution into a high-pressure kettle, and sealing to obtain the catalyst. The self-made hollow silicate material is adopted as the carrier, cerium, nickel and titanium are loaded in sequence, the prepared catalyst is large in specific surface area and high in catalytic activity, and the purity and yield of gamma-butyrolactone are effectively improved when the catalyst is used in gamma-butyrolactone synthesis.

The present application belongs to the field of polymer material recycling, and particularly relates to a composite catalyst for PET alcoholysis and use thereof. The present application prepares a new composite catalyst by skillfully regulating the ratio of polyethylene glycol and titanium sulfate, which is suitable for the process of degrading PET with mono-alcohol and poly-alcohol. By fine regulation of the reaction conditions, high conversion rate of PET is achieved, and the highest conversion rate can reach 100%. When using ethanol as the alcoholysis agent, the yield of the main product DET can reach 95%. When using methanol as the alcoholysis agent, the yield of the main product DMT can reach 93%. When using ethylene glycol as the alcoholysis agent, the yield of the main product BHET can reach 92% at the highest, and the content of the byproduct diethylene glycol is 0. This shows that the composite catalyst of the present application can completely inhibit the occurrence of side reactions. The results show that the composite catalyst of the present application can achieve efficient and clean catalytic reaction, and avoid unnecessary side reactions.

This invention relates to the field of coagulant technology and discloses a polyaluminum ferric silicate coagulant and its preparation method, comprising the following steps: S1 coal gangue is calcined to obtain modified coal gangue; S2 modified coal gangue is acid-leached to obtain coal gangue acid leaching solution; S3 the coal gangue acid leaching solution is subjected to titanium doping, pH adjustment, polymerization, centrifugation, and aging to obtain the coagulant. The preparation method provided by this invention, after activation and modification, undergoes acid leaching, polymerization, centrifugation, aging, and drying to prepare the polyaluminum ferric silicate coagulant. By optimizing the calcination temperature, modification ratio, acid concentration, polymerization pH, polymerization temperature, and polymerization time, the coagulation performance of the coagulant can be improved, thereby increasing the wastewater pollutant removal rate.

The application discloses a kind of copper electrolyte high-efficiency self-cleaning inducing agent and synthesis method thereof, comprising the following steps: S1, titanium sulfate is mixed with sulfuric acid solution and is calcined at 150-300 degrees Celsius;S2, the material obtained by calcining in step S1 is finely ground to more than 80% of-300 mesh;S3, using the mass concentration 20%-30% sulfuric acid solution, the material after fine grinding in step S2 is soaked, then filtered, and the obtained solid material is the final copper electrolyte high-efficiency self-cleaning inducing agent.The self-cleaning inducing agent synthesized by the application can be regenerated and reused.Using the self-cleaning inducing agent prepared by the synthesis method of the application for electrolyte purification can avoid the problems of high energy consumption and easy production of toxic and harmful gases that harm the environment in traditional processes, achieving carbon reduction and clean production.The self-cleaning inducing agent prepared by the synthesis method of the application has the advantages of high purification efficiency, simple synthesis method, low cost, environmental friendliness, recyclability and the like.

A hydrodesulfurization, deoxidation and hydrogen cyanide removal multifunctional purification catalyst applicable to ultra-low emission and comprehensive use of industrial tail gas, and the use thereof. Said catalyst uses activated carbon as a support, and is loaded with copper sulfate and titanium sulfate, the mass percentage of copper sulfate relative to the mass of the support being 5-15%, and the mass percentage of titanium sulfate relative to the mass of the support being 3-12%. Said catalyst is applicable to multifunctional purification of COS, CS2 and SO2 in low-hydrogen high-oxygen industrial tail gas such as blast furnace gas, carbon black tail gas and calcium carbide tail gas via hydrogenation conversion, deoxidization and hydrogen cyanide removal, solves the problem that traditional alumina-based cobalt-molybdenum, nickel-molybdenum or iron-molybdenum catalysts are prone to deactivation and have poor hydrogenation activity in said atmospheres, and exhibits low side reactions of carbon monoxide shift, thus facilitating source treatment and ultra-low emission of the described industrial tail gas while facilitating comprehensive use of subsequently recovered CO and hydrogen.

The present invention provides a titanium-doped hollow flower-spherical nano-alumina adsorbent, a preparation method and application thereof, and belongs to the technical field of adsorbent preparation. The present invention utilizes titanium sulfate as a titanium source, aluminum nitrate nonahydrate as an aluminum source, and urea as a precipitant, and obtains the titanium-doped hollow flower-spherical nano-alumina adsorbent through a hydrothermal co-precipitation method and high-temperature calcination. The interaction between the titanium-doped hollow flower-spherical nano-alumina adsorbent and PCl3 can efficiently remove trace amounts of PCl3, and the adsorbent can be recycled and reused multiple times after regeneration, thereby having good practical value.

The application belongs to the technical field of thallium-containing wastewater treatment, and discloses a potassium-modified TiO2 and application of the potassium-modified TiO2 in thallium-containing wastewater treatment. The potassium-modified TiO2 is obtained by using titanium sulfate as a titanium source and a potassium hydroxide precipitation method, and the adsorption capacity of the potassium-modified TiO2 reaches 990 mg / g. The potassium-modified TiO2 can remove Tl(I) by more than 99.2% under the condition of pH 4-12, and can effectively reduce the concentration of Tl(I) to below 0.1 μg / L. The application provides a modified titanium dioxide material with high adsorption capacity for the treatment of thallium-containing wastewater.

A method for reducing foreign matter in titanium phosphate powder is provided. A method for manufacturing titanium phosphate powder includes: mixing a titanium sulfate solution with a phosphoric acid solution to prepare a mixture, wherein the titanium sulfate solution is obtained by contacting a raw titanium sulfate solution with activated carbon and then filtering it through a filter.

The invention provides a magnesium-based composite water treatment flocculant and a preparation method thereof, and the preparation method comprises the following steps: mixing a magnesium sulfate solution, an aluminum sulfate solution, a titanium sulfate solution, a zinc sulfate solution and a polysilicic acid solution, carrying out a copolymerization reaction, and curing after the reaction is completed to obtain the magnesium-based composite water treatment flocculant. The magnesium-based composite water treatment flocculant is a novel composite inorganic polymeric flocculant, the composite effect of multiple metal ions such as magnesium, aluminum, titanium and zinc and polysilicic acid is fused, chemical bonds such as Al-O-Si, Ti-O-Si, Zn-O-Si and Mg-O-Si are formed through a copolymerization method, the multiple metal ions are tightly combined with silicic acid, and the water treatment effect is improved. The composite flocculant has the advantages that the stability and adsorption capacity of the flocculant are enhanced, a pore structure possibly appears on the surface of the composite flocculant, the specific surface area is increased, pollutant adsorption and bridging effects are also facilitated, and the removal rate of pollutants (such as ammonia nitrogen, humic acid and the like) in water can be obviously improved.

The invention relates to synthesis and a preparation method of a TiO2-CeO2 nano composite phytate transparent anti-aging intumescent fire retardant coating, and relates to the technical field of wood building protection. The invention comprises phytic acid (PA), urea, a sodium hydroxide solution, titanium sulfate and cerous nitrate. The phytic acid is used as an acid source and a carbon source of the expansion system; the urea is used as a gas source of the expansion system; the sodium hydroxide solution, the titanium sulfate and the cerous nitrate are used for preparing the TiO2-CeO2 nano composite powder. Phytic acid (PA) and urea are adopted to synthesize phytate flame retardant powder, TiO2-CeO2 nano-composite powder is added on the basis of the flame retardant, and the TiO2-CeO2 nano-composite phytate transparent anti-aging intumescent fire retardant coating is prepared, so that the aging time of the coating can be prolonged in an external environment, and a long-time service state can be kept. The synthesis reaction process involved in the invention is simple, and the prepared TiO2-CeO2 nano composite phytate transparent anti-aging intumescent fire retardant coating not only has excellent flame retardant property, but also has outstanding anti-aging property.

The invention provides a preparation method and application of a porous TiO2 microsphere photocatalytic material for treating wastewater containing methyl orange. The preparation method of the photocatalytic material is characterized by comprising the following steps: adding titanium sulfate and resorcinol into distilled water, and fully stirring for a certain time to dissolve the titanium sulfate and the resorcinol to form a first mixed solution; adding a formaldehyde aqueous solution into the first mixed solution, continuously stirring to form a second mixed solution, transferring the second mixed solution into a reaction kettle, carrying out solvothermal synthesis reaction, naturally cooling reactants, centrifugally collecting precipitates in the reaction solution, washing, drying and calcining to obtain the porous TiO2 microspheres. Compared with conventional titanium dioxide microspheres, the porous TiO2 microspheres have the advantages that the specific surface area is larger, meanwhile, the preparation process is simple and easy to implement, the cost is low, the yield is high, the stability is excellent, the porous TiO2 microspheres are applied to treatment of methyl orange-containing wastewater, the good photocatalytic degradation effect is achieved, and the purpose of simply, rapidly and conveniently treating the methyl orange-containing wastewater can be achieved.

The invention discloses a wide-temperature full-working-condition Mn / FeTi composite denitration catalyst as well as a preparation method and application thereof, and belongs to the technical field of flue gas denitration. The preparation method comprises the following steps: mixing ferrous sulfate heptahydrate, ferric chloride hexahydrate, titanium sulfate and distilled water, dropwise adding hydrochloric acid and ammonia water to adjust the pH value, stirring, aging, centrifugally washing the obtained precipitate, drying, and roasting to obtain the FeTi catalyst; and mixing and stirring manganese acetate tetrahydrate, distilled water and the FeTi catalyst, drying and roasting to obtain the Mn / FeTi catalyst. The MnO2 species used in the invention promotes strong interaction among the components of the catalyst and improves the activity of the catalyst at a low temperature section, the Ti < 4 + > ions enhance the structural stability of the catalyst and significantly improve the stability and poisoning resistance of the catalyst, and the prepared Mn / FeTi catalyst has high thermal stability, excellent catalytic performance and excellent sulfur resistance.

The present invention relates to the technical field of electrocatalytic material synthesis, specifically a method for preparing a nano-TiO2@AC@GPs electrocatalytic anode material. The method comprises first depositing an amorphous carbon layer AC on the surface of a graphite sheet (GPs) using chemical vapor deposition to obtain an AC@GPs composite material. CTAB is then dissolved in a methanol / deionized water mixed solution and stirred to obtain a solution A. A titanium sulfate solution is added to solution A to obtain a precursor solution B. The precursor solution B and the AC@GPs composite material are mixed and subjected to a hydrothermal reaction. After the reaction, the sample is washed, dried, and calcined to obtain a nano-TiO2@AC@GPs electrocatalytic anode material. The preparation process of the present invention is simple and efficient, and the resulting nano-TiO2@AC@GPs electrocatalytic anode material has excellent electrocatalytic activity and cyclic stability, addressing the problems of poor electrocatalytic performance of traditional graphite anode materials and having broad prospects for industrial application.

This invention provides a method for preparing bismuth titanate nanoparticles using molten salt assistance. Sodium bismuthate dihydrate, sodium sulfite, titanium sulfate, and sodium nitrate are mixed and ground uniformly to obtain a solid mixture. The solid mixture is then heated at 350°C to melt the sodium nitrate, creating an ion-molten liquid environment. Under this environment, a redox reaction between sodium bismuthate dihydrate and sodium sulfite generates the transition product bismuth oxysulfate, producing sodium hydroxide and creating a self-generated alkaline condition. Simultaneously, under this self-generated alkaline condition, bismuth oxysulfate reacts with titanium sulfate to form bismuth titanate. The reaction product is then post-processed to obtain Bi... 24 Ti2O 40 Nanoparticles. The advantages of this invention are: a synthesis strategy based on an ion-molten liquid environment, accelerated reactant diffusion, and improved chemical reaction efficiency to prepare Bi. 24 Ti2O 40 Nanopowders are easy to prepare, convenient to operate, have a mild reaction, and are low in cost, making them suitable for industrial production.

The application relates to the fine chemical industry, and discloses a supported titanium sulfate catalyst, a preparation method thereof and application of the supported titanium sulfate catalyst in a methyl methacrylate synthesis reaction. The supported titanium sulfate catalyst is composed of illite mesoporous composite material and titanium sulfate loaded on the illite mesoporous composite material; the illite mesoporous composite material has a one-dimensional and two-dimensional hexagonal pore dual pore distribution structure, a first most probable pore diameter of 2-7 nm, a second most probable pore diameter of 20-40 nm, a specific surface area of 150-600 m 2 / g, and a pore volume of 0.7-1.6 cm 3 / g; and the content of the illite mesoporous composite material is 60-90% by weight, and the content of the titanium sulfate is 10-40% by weight, based on the total weight of the supported titanium sulfate catalyst. The supported titanium sulfate catalyst is used in a methacrylization reaction, and higher methacrylic acid conversion rate and methyl methacrylate selectivity can be obtained.

The invention provides a preparation method of uniform titanium-doped iron phosphate based on titanium-hydrogen peroxide complexing slow release, and relates to the technical field of lithium ion battery positive electrode material preparation, and the preparation method comprises the following steps: 1, a synthesis stage: pure water is used for bottoming, an iron source and a phosphorus source are mixed, hydrogen peroxide is added for oxidation, and a basic ammonium iron phosphate precursor is generated through a reaction; 2, a conversion stage: adding water into the basic ammonium iron phosphate precursor for slurrying, performing crystal transfer in a high-temperature acid environment to obtain iron phosphate dihydrate, adding a titanium slow-release agent in a crystal growth stage, and performing suction filtration and washing to obtain titanium-containing iron phosphate dihydrate; 3, post-treatment: washing and calcining the titanium-containing iron phosphate dihydrate to obtain titanium-doped iron phosphate; the invention provides a process for preparing titanium-doped iron phosphate by taking a titanium slow-release agent as a titanium source, a titanium sulfate solution and hydrogen peroxide are combined to form a relatively stable complex to replace a traditional titanium sulfate source, and the crystallinity and the grain size of iron phosphate crystals prepared by the process are not obviously influenced by titanium-doped ions.

The application provides application of high-molecular-weight cationic polyacrylamide in titanium liquid sedimentation process in a sulfuric acid method titanium white process; the number average molecular weight of the high-molecular-weight cationic polyacrylamide is greater than or equal to 10 million.The application also provides a flocculation sedimentation method for improving the titanium liquid sedimentation effect in the sulfuric acid method titanium white process.The application applies cationic polyacrylamide to the titanium liquid sedimentation process in the sulfuric acid method titanium white, and the flocculant preparation time can be shortened by more than half compared with the previous time.In the flocculation process, the high cationic degree makes the ion concentration of the dissociated ions higher, the adsorption effect of the charges stronger, especially the adsorption effect on the silicic acid component contained in the titanium liquid stronger, so that the flocculation sedimentation process is carried out more quickly and completely.The application adopts emulsion-type high-ionic-strength high-molecular-weight cationic polyacrylamide, compared with the traditional flocculant product, can effectively improve the titanium liquid flocculation sedimentation effect in the sulfuric acid method titanium white, and comprehensively reduce the production cost.

The invention discloses a polymeric titanium coagulant based on a negative electrode material of a waste lithium titanate battery, a preparation method and application, and the process sequentially comprises the following steps: selectively extracting lithium from dilute sulfuric acid, and carrying out solid-liquid separation to obtain titanium-rich filter residues; corroding for 3-5 hours at the temperature of 60-85 DEG C by using a sulfuric acid-hydrogen peroxide mixed solution, and converting solid-phase titanium into a titanium peroxysulfate solution; and directly dropwise adding alkali liquor for in-situ polymerization without calcining or extracting, controlling OH / Ti to be 1.0-2.0, and aging to obtain the polymerized titanium coagulant. Titanium is kept in a liquid phase in the whole process, high-temperature calcination and organic solvent links are omitted, the energy consumption and the raw material cost are remarkably reduced, the product is used for water treatment, the turbidity, COD and phosphate removal effect is equivalent to that of a commercial pure titanium coagulant, and the purpose of treating pollution with waste is achieved.

According to the preparation method and the application of the polydopamine composite nano-material, the polydopamine composite nano-material is prepared by loading titanium dioxide on the surfaces of polydopamine nano-particles, and the preparation method comprises the following steps: step A1, uniformly dispersing polyvinylpyrrolidone into a polydopamine (PDA) nano-particle solution to obtain a solution A; respectively adding a titanium sulfate solution and a hydrogen peroxide solution, uniformly stirring, dropwise adding ammonia water to adjust the pH value to be neutral, reacting, standing, and centrifugally separating to obtain a dispersion liquid of PDA (at) PTC nanoparticles; and A2, putting the PDA (at) PTC solution prepared in the step A1 into a round-bottom flask, heating and stirring for 6 hours, and centrifugally washing to obtain a dispersion liquid of PDA (at) TiO2 nanoparticles. Polydopamine (PDA) with a good photo-thermal effect is prepared, titanium dioxide (TiO2) capable of generating a large amount of reactive oxygen species (ROS) under ultrasonic excitation is loaded on the surface of PDA, and finally photo-thermal-sonodynamic synergistic treatment of tumors is achieved, so that the purpose of improving the hypoxia microenvironment of the tumors is achieved.

The invention discloses a waste acid-based titanium concentrate low-concentration acidolysis method, which comprises the following steps: mixing concentrated sulfuric acid, titanium concentrate and iron powder, adding waste acid under the protection of inert gas, carrying out acidolysis to obtain a titanium concentrate acidolysis solid-phase substance, and leaching to obtain an acidolysis titanium solution. According to the method, a method of coupling low-concentration acidolysis of the titanium concentrate and reduction of the acidolysis titanium solution is adopted, the low-concentration acidolysis efficiency of the titanium concentrate is improved, meanwhile, the production period is greatly shortened, and the stability of the production process is improved; according to the method, the utilization level of titanium resources and sulfur resources in the waste acid can be improved, and the titanium dioxide production efficiency of the sulfuric acid method can also be improved. The method is simple in process, low in cost and wide in market popularization prospect.

The invention discloses a flame-retardant silk fabric with a PEI-GA / Me composite coating, the flame-retardant silk fabric comprises a silk fabric and a coating on the surface of the silk fabric, and the coating is formed after gallic acid reacts with polyethyleneimine and polyvalent metal salt; the multivalent metal salt is selected from one or more of ferrous sulfate, ferric sulfate, aluminum sulfate and titanium sulfate. According to the flame-retardant silk fabric with the PEI-GA / Me composite coating, a self-crosslinking network of PEI and GA is formed on the surface of the fabric and is chelated with metal ions (Me), so that the environmental protection problem of a flame retardant and the durability problem of a natural molecular flame retardant are solved, and an antibacterial function is provided for the fabric while the flame-retardant property is met.

A preparation method of a self-heating bifunctional catalyst for decomposing nitrogen oxides belongs to the field of decomposition of nitrogen oxides in gases, and comprises the following steps: taking ferric sulfate, manganese sulfate, cerous sulfate, praseodymium sulfate and titanium sulfate as raw materials, dissolving the raw materials in an alcoholic solution, then adding citric acid into a beaker, continuously stirring until the citric acid is dissolved, then adding ammonia water to adjust the pH value, and stirring to obtain a mixed solution; and finally, adding polyacrylamide, continuously stirring, filtering, and roasting a filter cake in a mixed atmosphere of oxygen and argon to obtain a final product. In the nitrogen oxide decomposition process, the product has a self-heating function, the gas temperature can be increased to 150-180 DEG C from 50-80 DEG C, and the decomposition rate of nitrogen oxide is larger than 99%. According to the invention, the consumption of energy and ammonia gas in the decomposition process of nitrogen oxides can be reduced, carbon monoxide contained in sintering flue gas can be utilized, the use cost can be reduced, and the emission of CO can be reduced.

This invention discloses a titanium-modified attapulgite catalyst suitable for potassium lysine systems, its preparation method, and its application. The method involves adding attapulgite to a titanium sulfate solution, followed by ultrasonication and a single water bath heating to obtain a mixed solution. The pH is adjusted to 10.0±0.5, followed by a second water bath heating and aging to obtain a coprecipitate. This coprecipitate is then washed, dried, ground, and calcined to obtain the final product. This method is simple, low-cost, and solves the problems of existing CO2 desorption catalysts, which are mostly applicable to alkanolamine systems, unsuitable for amino acid salts, and suffer from complex preparation, poor stability, or easy degradation in solution. The prepared Ti-ATP catalyst exhibits highly efficient and stable catalytic desorption performance in potassium lysine systems.

The invention discloses a preparation process for coating the surface of titanium dioxide with aluminum sulfate, and relates to the field of titanium dioxide production processes. When the titanium dioxide coated with the aluminum sulfate on the surface is prepared, titanium sulfate is prepared into the titanium dioxide, and the titanium dioxide coated with the aluminum sulfate on the surface is prepared after the titanium dioxide, the aluminum sulfate and alkali liquor react. The surface of the prepared titanium dioxide is coated with aluminum sulfate, so that the titanium dioxide has relatively low oil absorption and good weather resistance.

The application provides a method for preparing lithium manganese iron phosphate from iron hydroxyphosphate, wherein ferrous sulfate is purified to form a ferrous sulfate solution, hydrogen peroxide, phosphoric acid, ammonium dihydrogen phosphate solution, titanium sulfate and ammonia are sequentially added into the solution to form a mixed slurry after reaction, the mixed slurry is heated to a certain temperature and kept for a certain time, and then water washing and pressure filtration are performed to form iron hydroxyphosphate precursors with different iron-phosphorus ratios; the iron hydroxyphosphate precursors are subjected to flash drying and high-temperature sintering and crushing to obtain iron hydroxyphosphate precursors with different iron-phosphorus ratios and different specific surface areas; the iron hydroxyphosphate precursors are crushed and mixed to obtain iron hydroxyphosphate finished products; high-iron-phosphorus-ratio iron hydroxyphosphate and low-iron-phosphorus-ratio iron hydroxyphosphate are mixed according to a certain proportion, and lithium source, manganese source and phosphorus source are proportioned according to a certain proportion, and carbon source and additives are added to form a mixture; and after processes such as ball milling, sand milling, spray drying, sintering, crushing, screening, batching and packaging are performed on the mixture, lithium manganese iron phosphate finished products are obtained.

The application relates to a preparation method of crystalline titanium sulfate, and steps are as follows: 2-2.5 parts of 90% concentrated sulfuric acid are taken, 1 part of 98% titanium white powder or 2 parts of 56% hydrated titanium dioxide is slowly added, and an exothermic reaction is carried out; when the temperature reaches 90-100 DEG C or 140-145 DEG C, the reaction is continued for 48 hours; after filtration, 1 part of 75%-80% sulfuric acid is slowly added for acidification reaction to 120-125 DEG C, and stirring is carried out during the adding, until a viscous reaction product is obtained; cooling and crystallization are carried out, and titanium sulfate crystals are obtained. The application solves the problems of long dissolving time of titanium sulfate and easy hydrolysis, and the problems of high cost, complex process and low product purity in direct preparation of titanium sulfate.