156 results about "Crystal transformation" patented technology

The invention discloses a low-water-solubility medicine crystal as well as a preparation method and application thereof. The compound Z pamoate crystal form I has large characteristic diffraction peaks at one or more positions with diffraction angles 2 theta of 9.9 + / -0.2 degrees, 10.7 + / -0.2 degrees, 12.1 + / -0.2 degrees, 14.9 + / -0.2 degrees, 17.3 + / -0.2 degrees, 19.4 + / -0.2 degrees, 20.7 + / -0.2 degrees and 23.1 + / -0.2 degrees. Compared with an amorphous compound Z pamoate, the crystal provided by the invention has the advantages of good stability, no crystal transformation phenomenon, no obvious increase of related substances and low solubility; the production process is simple, only water is used as a solvent in the whole process, and no organic solvent is used; when the long-acting slow-release anti-Parkinson medicine composition is prepared from the compound Z pamoate crystal form I, the medicine encapsulation efficiency is high, the burst release is low, the composition continuously releases the medicine in vivo for more than 2 weeks, the administration frequency of a patient can be reduced, and the medication compliance is improved.

The invention relates to the technical field of iron phosphate preparation, in particular to a preparation method of low-impurity iron phosphate with a high iron-phosphorus ratio, which at least comprises the following steps: preparing an iron source solution and a phosphorus source solution; mixing an oxidizing agent and a phosphorus source solution as a phosphorus source mixed solution; adding the phosphorus source mixed solution into the iron source solution, and controlling the molar ratio of iron to phosphorus to be 1: (1.1-1.3) to prepare slurry; dividing the slurry into two parts, respectively adding an impurity removal agent, and then carrying out segmented aging at 90 DEG C to prepare crystallized slurry; and filtering, washing, drying and calcining the crystallized slurry to obtain a target product iron phosphate finished product. The impurity removal agent is selected from one or more of ferrous sulfate, ferrous chloride, ferrous nitrate and ferrous oxalate. Seed crystals are formed through segmented aging crystal transformation to promote crystal growth, and autonomous grain size distribution is achieved; an impurity removing agent is added in the aging stage, impurities are reduced by using the same ion effect, the iron-phosphorus ratio is increased, and the compaction density and the electrical property of the prepared lithium iron phosphate are remarkably improved.

The invention discloses a preparation method of a high-specific-power manganese dioxide-carbon fluoride battery positive pole piece. The preparation method comprises the following steps: (1) carrying out high-temperature heat treatment on electrolytic manganese dioxide to finish crystal transformation of the electrolytic manganese dioxide; (2) carrying out ball milling on the manganese dioxide, the carbon fluoride and the conductive agent which are subjected to heat treatment to obtain a composite substance of the manganese dioxide, the carbon fluoride and the conductive agent; (3) stirring and mixing the composite substance with a binder, a surfactant and deionized water to form manganese dioxide-carbon fluoride battery positive electrode slurry; and (4) coating the prepared positive electrode slurry on an aluminum mesh with a certain surface density in an extrusion or roller coating manner, and carrying out drying and rolling processes to obtain the high-loading-amount manganese dioxide-carbon fluoride battery positive electrode plate with a certain compaction density and surface density. The prepared positive pole piece has relatively high conductivity and energy density, and the high-magnification application scene of the lithium manganese dioxide-carbon fluoride battery is further widened.

The invention discloses a clindamycin phosphate crystallization tracing method and system based on a block chain, and belongs to the technical field of medicine manufacturing process control. The method comprises the following steps: collecting multi-modal data of a crystallization process in real time through a Raman spectrum sensor, an FBRM sensor and other process analysis technology sensors; constructing a dynamic space-time atlas based on the data to characterize a process state; deeply analyzing the map by using a time-space diagram neural network model so as to identify key crystallization events such as nucleation and crystal transformation; the AI oracle machine automatically generates an event certificate containing event details, an original data hash value and a digital signature for the identified CCE; and finally, submitting the certificate as a transaction to a block chain network for uplink evidence storage, and forming a tamper-resistant tracing record. According to the method, the AI and block chain technologies are fused, so that the problem that key microscopic events are lack of credible and non-tampering records in the crystallization process is solved, and a high-fidelity tracing record with cryptographic guarantee is provided for the pharmaceutical production process.

The invention discloses a method for preparing fine-grain copper and copper alloy through pulsed magnetic field and rare earth adding composite regulation and control, and belongs to the technical field of copper and copper alloy material preparation. Graphite mold casting is adopted in the method, and the method comprises the specific steps that electrolytic copper with the purity larger than or equal to 99.95 wt% or a copper alloy with specific components is prepared as a matrix raw material; after smelting, adding pure lanthanum blocks and uniformly stirring; after the melt is poured into a preheating mold, a pulsed magnetic field is applied immediately for treatment, and the parameters of the magnetic field are as follows: the pulse voltage is 180-250 V, the frequency is 4.5-6.5 Hz, and the duration time is 15-20 minutes. According to the method, the heterogeneous nucleation effect of rare earth lanthanum is combined with the melt forced convection and dendritic crystal crushing effect caused by the pulsed magnetic field to synergistically refine a solidification structure and promote columnar crystal orientation equiaxed crystal transformation, so that a cast ingot with fine crystal grains is directly obtained in the casting stage, and the possibility is provided for simplifying the subsequent processing technology.

The invention relates to a method for recycling valuable resources from a waste lithium iron phosphate material, and belongs to the technical field of recycling of waste lithium iron phosphate batteries. The method comprises the following steps: dispersing a waste lithium iron phosphate material in water to obtain a mixture I; respectively adding an acid solution and an oxidant solution into the mixture I at the same time to carry out leaching reaction, and carrying out solid-liquid separation to obtain a leaching solution A and active ferrophosphorus slag; iron powder and the leachate A are subjected to a replacement reaction to recover copper in the leachate A, and copper sponge and lithium-rich leachate are obtained; and calcining the active ferrophosphorus slag for crystal transformation to obtain decarbonized ferrophosphorus slag, the decarburized ferrophosphorus slag is mixed with alkali liquor, the mixture is placed in a mill to be subjected to ball-milling leaching, and leachate B and ferric hydroxide are obtained; and adjusting the pH value of the leachate B to be alkaline to obtain an aluminum hydroxide and phosphate solution. The method provided by the invention is simple to operate and low in cost, has good economic benefits and is easy for industrial application.

The invention relates to the technical field of battery materials, in particular to a Br-doped Y / Zr-based sulfide solid electrolyte and a preparation method and application thereof.The chemical formula of the Br-doped Y / Zr-based sulfide solid electrolyte is shown as the formula (I): Lia (YxZr1-x) bClcBrySd, wherein 0.5 < = (a + b) / (c + d) < = 1; gt; 0, bgt; 0, cgt; 0, dgt; 0; 0 lt; xlt; 1; 0 lt; and y < = c. According to the invention, by introducing Br <->, the lattice volume is expanded, the interstitial space in the crystal is improved, and the transmission path of Li < + > is expanded, so that the Li < + > migration energy barrier is reduced, and the conductivity of the solid electrolyte can be improved to a certain extent; a synergistic effect can be achieved through Y / Zr, so that an originally compact lattice framework is slightly expanded, and a smoother conduction path is constructed for ions Li < + >; on the other hand, crystal transformation of Zr can be inhibited through Y, the interface stability is improved, and finally the solid electrolyte has high conductivity and high interface stability.

The invention discloses a method for precipitating iron through ultrasonic enhanced oxidation, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: performing ultrasonic treatment on a mixed system of an iron-containing zinc sulfate solution and an oxidizing agent under an acidic condition, efficiently catalyzing ferrous ions (Fe < 2 + >) to be oxidized into ferric ions (Fe < 3 + >) by utilizing an ultrasonic cavitation effect, and promoting the ferric ions to be stably precipitated in a goethite (alpha-FeOOH) form; after the reaction is completed, carrying out solid-liquid separation to obtain a low-iron zinc sulfate solution and goethite slag; compared with a traditional jarosite method and a hematite method, the method has the advantages that exogenous cations such as potassium and sodium do not need to be introduced, a high-temperature and high-pressure environment is not needed, and the oxidation efficiency can be remarkably improved and the goethite crystal form conversion can be regulated and controlled only based on the ultrasonic cavitation effect, so that the consumption of an oxidizing agent and the zinc content in the slag are effectively reduced; meanwhile, the iron grade and the filtering performance of an iron precipitation product are improved; the method is suitable for various oxidants, is high in process adaptability, has the advantages of high efficiency, greenness and economy, and has wide popularization and application prospects in the field of zinc smelting.

The utility model relates to the technical field of gas heating, and discloses a heat source structure and a fluidization crystal transformation device. The heat source structure comprises a pipeline which is provided with a channel penetrating in the axial direction of the pipeline, and the channel is used for gas to pass through; the heating assembly is used for heating the pipeline; wherein the channel is internally provided with filler, the filler is provided with a gap, and gas can be discharged from the gas outlet of the channel through the gap. The fluidization crystal transformation device comprises a furnace body and a heat source structure. According to the technical scheme, the technical problem of high energy consumption of a device for preparing anhydrous iron phosphate in the prior art can be solved.

This invention discloses a method for precipitation separation and ceramic solidification of divalent strontium and tetravalent uranium in radioactive waste liquid, relating to the field of radioactive waste liquid treatment and disposal. U in high-level radioactive waste liquid is in the form of hexavalent uranyl (UO2). 2+ U exists in the form of hydrogenation catalytic reduction, and the present invention uses hydrogenation catalytic reduction to prepare U. 4+ Sr 2+ and U 4+ ionic radius and Ln 3+ Due to the significant differences, CePO4·0.667H2O cerium phosphate, which has a stronger nuclide-containing capacity, was selected as the co-precipitation enrichment agent for Sr. 2+ and U 4+ Separation precipitant. Inexpensive raw materials such as UO2(NO3)2·6H2O, Sr(C2H3O2)2, NH4H2PO4, and Ce(NO3)3·6H2O are selected. By controlling the Sr... 2+ :U 4+ Ion ratio, reaction time, temperature, pH, and preparation of well-developed Sr crystals 2+ / U 4+ The precipitate of cerium phosphate solid solution with high solid content is avoided by using spark plasma solid-state sintering technology to prevent grain agglomeration and adhesion during high-temperature dehydration and crystal transformation of cerium phosphate. Furthermore, pressure sintering can promote further growth of nanocrystals and promote U... 4+ and Sr 2+ Homogenization within the monazite ceramic solidified body enables a one-step preparation of monazite ceramic solidified body from a lanthanite solid solution.

The utility model relates to a titanium dioxide zero-carbon suspension rapid crystal transformation system which comprises a desulfurizing tower, an induced draft fan, a bag collector, a scattering dryer, a high-temperature fan, a first cyclone cylinder, a suspension calcining furnace and a second cyclone cylinder. According to the utility model, titanium dioxide is produced by adopting a suspension calcination technology, green electricity is adopted as electric energy, and a byproduct carbon dioxide is recycled, so that zero-carbon production of products is facilitated, and carbon neutralization in the titanium dioxide industry is promoted.

The invention belongs to the technical field of preparation of adsorption materials, and relates to a 13X molecular sieve adsorbent for removing CO2 as well as a preparation method and application of the 13X molecular sieve adsorbent. The preparation method comprises the following steps: firstly, soaking clay powder in an acid solution, and carrying out filter pressing to obtain a clay filter cake; then, mixing the high-silica-alumina-ratio 13X molecular sieve, the clay filter cake and a pore-forming agent, granulating and forming, and drying and roasting to obtain the spherical high-silica-alumina-ratio 13X molecular sieve adsorbent with the particle size of 1.6-2.4 mm, and finally, treating the 13X molecular sieve adsorbent with the high silica-alumina ratio in a caustic alkali solution, washing, drying and roasting to obtain the efficient 13X molecular sieve adsorbent for removing CO2. According to the method, one-step aluminizing-directional crystal transformation is realized, and the prepared 13X molecular sieve adsorbent has higher CO2 adsorption capacity and is suitable for efficient removal of trace CO2 in air separation.

The invention discloses a bird nest type hydrogenation protective agent for a coal-to-oil system as well as a preparation method and application of the bird nest type hydrogenation protective agent, and belongs to the technical field of catalyst protection. The preparation method of the protective agent comprises the following steps: kneading pseudo-boehmite, a binder and a special molecular sieve, then adding an acid solution, polyvinyl alcohol and glycerol, and carrying out wet kneading to obtain mud; after wet kneading is finished, sequentially carrying out vacuum pugging, aging, extrusion molding by adopting a bird nest type mold, pelletizing and roasting to obtain a protective agent carrier; and loading an active metal component on the obtained protective agent carrier, and sintering to obtain the protective agent. According to the protective agent, the pseudo-boehmite with high crystallinity and high pore volume and the special molecular sieve are cooperatively used, and through shaping and roasting crystal transformation, the protective agent has the advantages of high radial strength, high water absorption capacity, high polar oxide adsorption capacity and high deoxidization capacity, and oxygen-containing compounds in coal-to-oil heavy oil can be effectively removed; the service life of the main catalyst is prolonged.

The application provides a method for preparing high-iron-phosphorus-ratio iron phosphate in batches at low cost, and the steps are as follows: S1. reacting a ferrous sulfate solution, a phosphorus salt solution and hydrogen peroxide to obtain amorphous iron phosphate; S2. filtering and washing the amorphous iron phosphate; S3. adding pure water to the filtered cake of the washed amorphous iron phosphate, stirring, heating, adding a crystal transformation promoter after keeping warm, and reacting to obtain iron phosphate dihydrate slurry, and reserving part of the iron phosphate dihydrate slurry; S4. squeezing, drying and calcining the remaining iron phosphate dihydrate slurry; S5. repeating steps S1-S4 in batches; if it is the first batch reaction, the crystal transformation promoter is phosphoric acid, and if it is not the first batch reaction, the crystal transformation promoter is a mixture of hydrogen peroxide and crystal nuclei prepared from the iron phosphate dihydrate slurry reserved in the last batch. The method can greatly save the preparation cost of iron phosphate, and the iron-phosphorus ratio of the prepared iron phosphate is above 0.99.

The present invention relates to the field of glass preparation technology, and in particular to a highly corrosion-resistant pharmaceutical glass rotating tube and its preparation method, in order to alleviate the problems of poor corrosion resistance of existing mullite rotating tubes and the easy cracking of high-zirconium rotating tubes. This solution effectively locks the Na in the glass liquid by introducing waste borosilicate glass into an alumina (main crystal phase α-Al2O3) matrix with good high-temperature stability. + The added CaO and MgO can promote the conversion of γ-Al2O3 to α-Al2O3 at a lower temperature (α-Al2O3 has better high-temperature stability). At the same time, the formed composite borate CaMgB2O5 can inhibit the growth of ZrO2 grains, stabilize the cubic phase of ZrO2, avoid cracking caused by crystal transformation, and effectively improve the thermal shock resistance, thereby extending the service life of the rotary tube and reducing the adverse effects of the rotary tube on product quality.

The invention provides a method for preparing anhydrous gypsum through phosphogypsum crystal transformation and purification, and relates to the technical field of industrial solid waste recycling. The method comprises the following steps: uniformly mixing the phosphogypsum, the acidic mixed solution and the crystal modifier, reacting under specific conditions, and filtering while hot after the reaction is finished, thereby obtaining the anhydrous gypsum. According to the technical scheme, the growth process of the anhydrous gypsum is regulated and controlled by introducing the specific crystal modifier, so that the anhydrous gypsum with high purity and high compressive strength is obtained. The method is suitable for preparing the anhydrite by taking the industrial byproduct phosphogypsum with high phosphorus impurity content as the raw material, the produced anhydrite is good in crystallization conversion, excellent in product quality, simple in process, high in efficiency and low in energy consumption, the water demand is lower than that of a traditional method, the phosphogypsum waste can be utilized, and resource circulation is realized.

The invention provides a cefditoren pivoxil sustained-release tablet which comprises cefditoren pivoxil, a crystal transformation inhibiting material, a framework material, a pore-foaming agent, an adhesive, an antioxidant and a lubricant, the crystal transformation inhibiting material, the framework material and the adhesive are all polyoxyethylene, the pore-foaming agent is polyethylene glycol 8000, the antioxidant is polyethylene glycol 8000, and the lubricant is polyethylene glycol 8000. The cefditoren pivoxil crystal form can effectively overcome the defect that an existing cefditoren pivoxil preparation is taken many times, can ensure the stability of the cefditoren pivoxil crystal form, can reduce the variety of auxiliary materials in the preparation, and is suitable for commercial production.

The invention provides a candesartan cilexetil capsule and a preparation method thereof, and the candesartan cilexetil capsule is characterized in that each capsule contains candesartan cilexetil, lactose, corn starch, hydroxypropyl cellulose, carboxymethyl cellulose calcium, polyethylene glycol 8000 and magnesium stearate. According to the candesartan cilexetil capsule provided by the invention, the problem of stability of candesartan cilexetil is solved, the possibility of crystal transformation of common tablets in a tabletting process is reduced, and the characteristic dissolution curve of a final product is similar to that of a reference preparation; the preparation method is simple in process route, the fluidized bed one-step granulation method enables the loss to be less, the product yield is higher, and the industrial mass production cost is reduced.

The invention relates to a preparation method of febuxostat tablets, which comprises the following steps: adding febuxostat, a filler and an adhesive into a wet granulation pot, and premixing; dissolving the solubilizer with absolute ethyl alcohol, and then adding purified water to form a solution; adding the solution formed in the step 2 into the premixed material, and granulating to obtain an intermediate; putting the intermediate into an oscillating granulator for wet granulation; drying the wet granules by using a fluidized bed; carrying out dry granulation on the dried granules by using a 24-mesh screen; placing the dried whole granules in a three-dimensional mixer, adding a corresponding amount of disintegrating agent and lubricant according to the yield, and carrying out total mixing to obtain a semi-finished product; and tabletting and coating the semi-finished product to finally obtain a finished product. The solubilizer is polyoxyethylene hydrogenated castor oil; the febuxostat tablet solves the problems of possible crystal transformation and poor dissolution rate in the preparation process of the existing febuxostat tablet through the steps.

This application provides a method for preparing nano-sized orthogonal iron phosphate and a method for preparing lithium iron phosphate cathode materials, relating to the field of electrode materials. The method for preparing nano-sized orthogonal iron phosphate includes: mixing a first ferrous salt solution with a first phosphorus source solution and an oxidant to perform a co-precipitation reaction to obtain amorphous iron phosphate; mixing the amorphous iron phosphate with water to form a slurry, controlling the slurry particle size, and then adding a crystal transformation aid to the slurry, followed by aging under stirring conditions at a pH of 0.8–1.5 to obtain nano-sized orthogonal iron phosphate; wherein the crystal transformation aid includes a second ferrous salt and a second phosphorus source. The iron phosphate prepared in this application is single-crystal nano-sized orthogonal iron phosphate, reducing the grinding pressure at the lithium iron phosphate end. Simultaneously, its unique octahedral structure is more stable than monoclinic iron phosphate produced by conventional processes, with fewer crystal defects and higher lattice integrity, effectively avoiding the generation of magnetic foreign matter during sintering and contributing to the performance of lithium iron phosphate materials.

The application provides a method for preparing offretite by using natural analcime as a raw material, the offretite and application thereof, and relates to the technical field of zeolite materials. The natural analcime is mixed with an aqueous solution of an ammonium salt to perform ion exchange, so that ammonium-type analcime is obtained; the ammonium-type analcime is calcined to obtain hydrogen-type analcime; and the hydrogen-type analcime is mixed with sodium hydroxide, potassium hydroxide and water to perform hydrothermal reaction, so that the offretite is obtained. The natural analcime is a kind of zeolite mineral widely existing in nature, and the application uses the natural analcime as a raw material, so that the application has the remarkable advantages of low price and environmental friendliness; and the traditional hydrothermal method needs 7-10 days to synthesize offretite with high crystallinity, while the application uses the natural analcime as a raw material to perform crystal transformation synthesis of offretite, so that offretite with high crystallinity can be obtained in 0.5-2 days. Moreover, the offretite provided by the application can efficiently adsorb heavy metal ions in wastewater.

The present application relates to steel and non-ferrous smelting slag comprehensive recovery and iron-making resource utilization comprehensive utilization technical field, disclose a kind of copper slag efficient iron-making method based on magnetic separation pretreatment, comprising: to molten iron-silicate base waste slag input by calcium carbide, sodium fluoride and phosphorus component consisting of conditioning agent, using sodium fluoride to build liquid diffusion field exposure reduction interface, induce calcium carbide and iron silicate in situ reduction to generate metal iron core;Heat treatment promotes iron core polymerization growth;Gradient cooling, using phosphorus component induces silicate matrix crystal transformation to generate expansion stress and break matrix;Grinding powder and weak magnetic separation, extract magnetic enrichment product, the present application breaks iron-oxygen-silicon chemical bond, realizes the conversion of combined state iron to independent metal state, achieves iron and gangue phase decoupling, using endogenous stress induction self-pulverization, reduce grinding energy consumption, output high-grade iron powder and simultaneously remove sulfur zinc impurities.

The invention belongs to the technical field of medicinal chemistry, and particularly relates to an aripiprazole-trimesic acid salt form and a preparation method thereof. According to the salt form, a basic unit is composed of tetramolecular aripiprazole and tetramolecular trimesic acid. The salt form obtained by the invention has relatively high solubility performance and physical stability; the obtained salt form is not easy to generate crystal transformation or degradation, and shows excellent storage stability and process adaptability. Meanwhile, the preparation method of the salt form is simple in process and mild in condition, and has a remarkable industrial application prospect.

The invention discloses an intermediate, a COF material as well as a preparation method and application of the COF material, and a series of imine-connected 3D COFs can be easily synthesized by adopting an intermediate (CIM) with a specific structure and utilizing a conversion scheme of the intermediate. Molecules and crystal structures of crystal intermediates are directly analyzed through three-dimensional electron diffraction (3DED), and the method is an emerging method for analyzing the light beam sensitive nanocrystals. A way from CIM synthesis of 3D COFs crystals to crystal conversion is adopted, and formation of an initial amorphous polymer is avoided. Compared with a classical sealed tube scheme, the novel CIM conversion scheme has several obvious advantages, such as no need of deoxidation operation, lower reaction temperature, higher crystallization efficiency and easier amplification. In addition, the new scheme is further successfully expanded to synthesis of other diamond (dia) net 3D COFs, and wide applicability is proved.

The invention discloses a preparation method of an abesilib III crystal form, which comprises the following steps of: 1, adding an abesilib crude product into DMSO (Dimethylsulfoxide), heating and dissolving, cooling after the system is dissolved to be clear, then adding isopropyl acetate, stirring, cooling and crystallizing, and then stirring, carrying out suction filtration and vacuum drying to obtain the abesilib III crystal form; or the method II comprises the following steps: adding the crude product of abelsilib into isopropyl acetate, stirring for crystal transformation, then cooling for crystallization, stirring, carrying out suction filtration, and carrying out vacuum drying to obtain the crystal form III of abelsilib. According to the preparation method, DMSO is adopted as a solvent, isopropyl acetate is adopted as a crystallization solvent, or isopropyl acetate is adopted as a crystal transformation solvent, the prepared abelsilib III crystal form is good in quality and high in yield, the process is simple, the requirement for equipment is low, the production period is short, the production cost is effectively reduced, and industrial mass production is easy to achieve.

The invention discloses a process for preparing iron phosphate from an acid solution containing impurity iron phosphate, and belongs to the technical field of iron phosphate purification, and the process comprises the following steps: putting an amorphous iron phosphate filter cake into a reaction kettle, adding water and acid into the reaction kettle, heating and stirring for crystal form transformation to obtain iron phosphate aged slurry; taking an iron phosphate acid solution, adding the iron phosphate acid solution into the iron phosphate aged slurry obtained in the step 1, continuously stirring and preserving heat until iron phosphate in the iron phosphate acid solution is precipitated, and then filtering and washing to obtain iron phosphate dihydrate and a recycled acid solution; taking iron phosphate dihydrate, adding water and phosphoric acid, and grinding to D50lt at high temperature by a machine; filtering and washing to obtain iron phosphate and phosphoric acid-containing mother liquor; and drying and sintering the iron phosphate to obtain the battery-grade anhydrous iron phosphate. According to the method, a unique impurity removal and purification process is adopted, alkali is not needed for acid-base neutralization, meanwhile, acid in the recovered solution is recycled, and industrial production of low-cost purification and recovery of the iron phosphate waste is achieved.

The invention provides an environment-friendly disperse dye and a preparation method thereof. The preparation method comprises the following steps: a pretreatment step: refining 3, 4-dichlorophenyl thiourea by using an organic solvent to obtain refined 3, 4-dichlorophenyl thiourea; a closed loop step: under an acidic condition, the refined 3, 4-dichlorophenyl thiourea is subjected to closed loop to obtain a thiazole mixed slurry, and the thiazole mixed slurry comprises 2-amino-5, 6-dichlorobenzothiazole and 2-amino-6, 7-dichlorobenzothiazole; a diazotization step: under an acidic condition, carrying out a diazotization reaction on the thiazole mixed slurry and a diazotization reagent to obtain a diazotization liquid; and a coupling step: carrying out a coupling reaction on the diazonium liquid and an esterification reagent, and carrying out crystal transformation to obtain the environment-friendly disperse dye. The environment-friendly disperse dye disclosed by the invention is qualified in environment-friendly index, high in yield and purity and suitable for mass production.

The invention provides titanium-doped iron phosphate and a preparation method and application thereof, and belongs to the technical field of battery materials.The preparation method of the titanium-doped iron phosphate comprises the steps that an iron source solution and titanium source slurry subjected to crystal transformation treatment are mixed to obtain first slurry; a phosphorus source solution and a pH regulator are sequentially added into the first slurry, and second slurry with the pH larger than 2 is obtained; filtering the second slurry to obtain a first filter cake, rinsing the first filter cake, and dispersing the first filter cake with a phosphoric acid solution to obtain a third slurry; after the third slurry is aged, the obtained aged slurry is filtered, washed, dried and sintered in sequence, and titanium-doped iron phosphate is obtained. The titanium source slurry subjected to crystal transformation treatment is introduced into an iron phosphate synthesis system, hydrated titanium dioxide in the sintered titanium source slurry is converted into anatase titanium dioxide, the anatase titanium dioxide and iron phosphate form an interstitial solid solution, and the prepared titanium-doped iron phosphate has a relatively high iron-phosphorus ratio, so that the capacity performance of a secondary battery is improved.

The invention belongs to the technical field of oxygen carriers, and discloses a composite oxygen carrier and application thereof in a chemical looping process, the chemical general formula of the composite oxygen carrier is gamma-Fe2O3 / CeO2, and the molar ratio of Fe / (Fe + Ce) is 0.6-0.8; the preparation method comprises the following steps: synthesizing FexCe1-xO by adopting a one-step coprecipitation method, and promoting Fe species to generate directional migration and crystal form transformation by adopting a three-step activation process, specifically, enriching an iron element to the surface, and converting the crystal form into high-activity gamma-Fe2O3 from alpha-Fe2O3. In addition, the gamma-Fe2O3 / CeO2 composite oxygen carrier subjected to activating treatment shows breakthrough performance advantages that ultra-deep removal with the CO concentration being lower than 100 ppm or so is achieved in the chemical looping hydrogen production process, meanwhile, the H2 recovery rate is kept to be larger than or equal to 95%, and the index is remarkably superior to that of a traditional membrane separation method (the recovery rate is about 85%) and a metal hydride method (CO residue gt; 200 ppm).