36results about How to "The method flow is simple" patented technology

The invention relates to a metal additive modified Pt-loaded CeO2 catalyst, preparation and application thereof in CO oxidation, and belongs to the technical field of industrial catalysis. The preparation process of the catalyst mainly comprises the following steps: respectively dissolving cerium salt, platinum salt and auxiliary metal salt in deionized water to prepare corresponding precursor solutions; then, mixing the three solutions, and dropwise adding ammonia water under a stirring condition until yellow precipitates are generated; and finally, drying and washing the precipitate, and calcining the solid powder in a proper atmosphere to obtain the assistant metal modified Pt / CeO2 catalyst. La, Pr, Nd or Sm auxiliary metal is introduced into the Pt / CeO2 catalyst, so that the CO catalytic oxidation performance of the catalyst can be improved, and the poisoning resistance of the catalyst in an SO2-containing environment can be enhanced. The method has important significance in the actual industrial application, especially in the catalytic oxidation process under the condition of treating complex flue gas.

The invention relates to preparation of sodium bicarbonate co-production ammonium sulfate, in particular to a method and a system for preparing sodium bicarbonate co-production ammonium sulfate from low-temperature mirabilite, and aims to overcome the defects that high-purity ammonium sulfate cannot be obtained or the technical route of twice freezing-high-temperature ammonia distillation is high in energy consumption and large in industrialization difficulty in the prior art. The method for preparing sodium bicarbonate and co-producing ammonium sulfate from mirabilite at low temperature comprises the steps of preparing sodium bicarbonate, preparing ammonium sodium solid salt, acidifying and crystallizing the ammonium sodium solid salt, cooling and crystallizing, and preparing ammonium sulfate, and the sodium sulfate and the ammonium sodium solid salt are removed to obtain a high-purity sodium bicarbonate product and an ammonium sulfate product. In the system for preparing sodium bicarbonate and co-producing ammonium sulfate from mirabilite at low temperature, a plurality of evaporation devices and recycling pipelines among the evaporation devices are reasonably arranged, so that full utilization and recovery of products in each step are realized.

The invention relates to the technical field of gas-liquid treatment, and discloses a carbon dioxide trapping and wastewater recycling treatment method based on a cavitation air flotation method, which comprises the following steps: S1, flue gas of a blast furnace and a hot blast stove in an iron and steel plant is communicated with an air inlet of a cavitation air flotation fan blade through a flue gas channel, and the fan blade rapidly rotates to generate a negative pressure environment underwater; the method comprises the following steps: (1) adding a liquid into a cavitation air floatation tank, enabling flue gas to enter the liquid through fan blades, and dispersing the flue gas through the fan blades to form microbubbles, (2) injecting whole-plant comprehensive wastewater containing calcium and / or magnesium ions in a steel plant into the cavitation air floatation tank, and enabling carbon dioxide in the flue gas to react with the calcium and magnesium ions in the wastewater to form precipitates; according to the method, a brand new thought is provided, the wastewater and the flue gas of the steel mill are subjected to economic cooperative treatment, and compared with a traditional flue gas treatment method, the method provided by the invention has the advantages that the process of carbon dioxide absorption and wastewater treatment is more simplified, the mass transfer efficiency is enhanced, and meanwhile, the difficulty of collection after precipitation of calcium and magnesium ions in water is reduced.

This invention relates to a processing method for soft and tender abalone with a soft, glutinous texture, comprising the following steps: S1, pre-treating fresh abalone to obtain pre-treated abalone meat; S2, placing the pre-treated abalone meat under hot air conditions, first heating it to a first temperature and holding it at that temperature, then raising the temperature to a second temperature and holding it at that temperature, to obtain enzyme-inactivated abalone meat; the first temperature does not exceed 55°C, and the second temperature is at least 10°C higher than the first temperature; S3, enzymatically hydrolyzing the enzyme-inactivated abalone meat with a protease, and after inspection and packaging, obtaining soft and glutinous abalone with a soft, glutinous texture. This invention, through gradient temperature inactivation of enzymes and three-parameter synergistic regulation of enzymatic hydrolysis, produces soft and glutinous abalone with a sticky adductor muscle adhesiveness >25N, a soft, glutinous texture uniformity >90%, and a 100% success rate in achieving the desired soft and glutinous texture. The method of this invention is simple and can achieve large-scale and continuous production. It is suitable for the industrial processing of high-end ready-to-eat soft-boiled abalone, pre-cooked soft-boiled abalone, and other products, significantly improving the added value and market competitiveness of abalone products.

The invention belongs to the technical field of polypeptides and polypeptide detection, and particularly relates to a screening method for quantitative common polypeptides and application of the screening method. According to the method, quantitative common polypeptides of multiple species are obtained by combining a high-resolution mass spectrum collection method and a liquid chromatography-tandem mass spectrum verification mode, the method is simple in process and easy to operate, and long optimization steps are not needed. The quantitative common polypeptide has higher response intensity on mass spectrum, is not influenced by species types, species contents, other proteins / polypeptides of species and the like, can reduce the influence of factors such as a processing production process and a sample treatment process, and can judge the stability and the like of a mass spectrum detection process according to the response condition of the quantitative common polypeptide in the mass spectrum. The method can be used as a reference object for correcting the content of species in a multi-element complex system.

The invention provides a method for predicting hydration expansibility of a compacted bentonite material, which comprises the following steps of: generalizing soil particles into a spherical shape, and dividing a compacted bentonite structure into a characteristic structure element consisting of four particles based on a space accumulation configuration; according to constraint conditions of apparent density, elastic deformation energy minimization and structural entropy maximization of the soil body structure, the distribution probability of each characteristic structure element is solved; a Hertz contact model is adopted to calculate the expansive force between particles in the characteristic structure elements; calculating the equivalent expansive force of each characteristic structure element through a finite element method; based on the Hill lemma, the macroscopic hydration expansibility of the compacted bentonite structure is predicted. According to the method, the prediction process is simple, the calculated amount is moderate, the hydration expansibility of the compacted bentonite structures with different dry densities can be accurately and theoretically predicted, and theoretical guidance can be provided for design and prediction of the hydration expansibility of the compacted bentonite structures in the environments of refuse landfills, nuclear waste repositories and the like.

The invention belongs to the technical field of solvent extraction, and particularly discloses a regeneration method of an extraction solvent. The method specifically comprises the following steps: mixing an extraction solvent with an adsorbent, and carrying out solid-liquid separation to obtain a regenerated extraction solvent and a to-be-treated adsorbent. The extraction solvent is a recovered extraction solvent after extraction operation, and the adsorbent comprises one or more of a zeolite molecular sieve, diatomite, kaolin, anhydrous magnesium sulfate and anhydrous sodium sulfate. The extraction solvent adsorbent used in the method has strong adsorption capacity, not only can adsorb water molecules entrained in the extraction solvent, but also has a very good removal effect on impurity elements enriched in the extraction solvent, and the treated extraction solvent has relatively short extraction phase separation time. The method is simple in process and low in energy consumption, the used adsorbent is low in price, adsorbed impurities can be removed at high temperature, then the adsorbent can be recycled continuously, no waste liquid is generated, and the method has remarkable environmental protection value and economic benefit.

The invention belongs to the technical field of artificial intelligence and network predictive maintenance, relates to a fault prediction method based on a multi-source migration echo state network, and aims to solve the problem of low prediction precision caused by insufficient early samples of a fault, and the method comprises the following steps: firstly, extracting migration knowledge from a plurality of historical fault source domains by using the echo state network; secondly, measuring the similarity between the source domains and the target domain and the difference between the source domains by adopting a dynamic time warping distance, and selecting a plurality of similar source domains with complementary information; then, a plurality of prediction sub-models are established in the target domain in combination with migration knowledge of the selected source domain, and a final prediction model is obtained through integrated learning; and finally, performing future value prediction on the key variables acquired in real time by using the model. According to the method, multi-source historical information can be fully utilized under the small sample condition, the fault prediction precision and generalization ability are remarkably improved, and the method is suitable for fault prediction scenes with multi-source time series data in industrial processes, mechanical equipment, power systems and the like.

This invention relates to the field of physical oceanography, specifically to a method for rapidly identifying the upper and lower boundaries of the ocean thermocline. The method utilizes trigonometric functions as basis functions to construct a 10th-order trigonometric polynomial, and obtains the fitting parameters and results using the least squares method. Then, the first derivative of the trigonometric polynomial is calculated. The maximum value and its location, as well as all minimum values ​​and their locations, are determined. From the location of the maximum value, the two locations of the first minimum values ​​less than 1 / 10 of the maximum value are found on both sides. This yields the upper and lower boundaries of the ocean thermocline depth. This invention eliminates the subjectivity of parameter selection by eliminating the need for manually setting thresholds; it also avoids complex transformation and construction processes, resulting in a clear algorithm structure and high computational efficiency. It can operate stably in different sea areas and under various data precision conditions, significantly improving the automation, robustness, and computational efficiency of thermocline identification.

The invention provides a method for preparing nickel-cobalt-manganese ternary regenerated liquid through multi-metal co-extraction and application, and the method comprises the following steps: firstly, carrying out calcium extraction treatment on a leaching solution obtained by removing iron, aluminum and copper from battery positive electrode black powder by adopting a first extraction organic phase to obtain a calcium-loaded organic phase and a calcium-removed raffinate; carrying out nickel-cobalt-manganese co-extraction on the calcium-removed raffinate by adopting a second extraction organic phase to obtain a nickel-cobalt-manganese-loaded organic phase, and carrying out reverse extraction treatment on the nickel-cobalt-manganese-loaded organic phase to obtain a nickel-cobalt-manganese mixed solution; and finally, the nickel-cobalt-manganese mixed solution is subjected to purification and impurity extraction treatment through a third extraction organic phase, and the nickel-cobalt-manganese ternary regenerated liquid is obtained. According to the preparation method provided by the invention, synchronous extraction of nickel, cobalt and manganese is realized, and the nickel-cobalt-manganese ternary regenerated liquid obtained by co-extraction can be directly used for in-situ preparation of the ternary positive electrode material, so that the regeneration period of the ternary positive electrode material is greatly shortened, the operation complexity and the production energy consumption are reduced, and the overall recovery cost is greatly reduced.

The invention belongs to the technical field of piston shoe preparation, and particularly relates to a low-cost preparation method of a copper-steel composite bimetal piston shoe blank for a high-pressure plunger pump. According to the method, the characteristic that the melting point of copper alloy is lower than that of a steel base material is utilized, a steel material is machined into a sliding shoe base blank with a cavity, then a prefabricated copper alloy blank is loaded into an inner cavity of the steel base blank, and a layer of protective borax covers the inner cavity of the steel base blank; heating in an inert atmosphere protection resistance heating furnace or a reducing atmosphere protection resistance heating furnace to melt the copper alloy into a liquid state, preserving heat for a certain time in a high-temperature environment to infiltrate and diffuse the liquid-state copper alloy to the surface of the solid-state steel base, and then discharging and cooling to solidify the copper alloy in the cavity; and finally, a metallurgically bonded copper-steel bimetal composite sliding shoe blank is prepared.

The invention discloses a multi-layer PCB (Printed Circuit Board) stacking and encapsulating method and a multi-layer PCB stacking structure, and relates to an integrated circuit packaging technology. The multi-layer PCB stacking and potting method comprises the following steps that a, a first PCB layer is used for bearing a core component, the core component and a bonding wire of the first PCB layer are covered with high-heat-conduction or high-pressure-resistant potting glue, and the core component is a high-heating or high-pressure component; b, the second PCB layer bears the low-heating component, the second PCB layer and the first PCB layer are overlapped and fixed to form a low-layer PCB structural body, and the low-heating component and the bonding wire of the second PCB layer are covered with low-stress pouring sealant; and c, carrying a power supply or a passive device by using a third PCB layer, overlapping the third PCB layer to the low-layer PCB structural body to form a composite PCB structural body, and carrying out potting on the composite PCB structural body by using a conventional potting adhesive. The method is simple in process, high in effectiveness and low in cost, and can be widely applied to potting of multi-layer PCB stacked products including power chips, bare chips, passive elements and the like.

The invention provides a method for preparing white carbon black from coal gangue kaolin, relates to the technical field of inorganic non-metallic material preparation, and aims to solve the problems of pollution caused by stockpiling of coal gangue kaolin, low resource utilization rate and non-systematic separation of silicon and aluminum. And an integrated technical system of waste recycling, precise roasting, efficient silicon-aluminum separation and double-product synergistic preparation is innovatively constructed. According to the method, coal gangue kaolin is taken as a raw material, efficient separation of silicon and aluminum is realized through the steps of crushing, temperature-controlled roasting, hydrochloric acid leaching, solid-liquid separation, washing dehydration, high-temperature calcination and the like, white carbon black is prepared from a solid phase, and aluminum chloride crystal is recovered from a liquid phase and roasted to obtain aluminum oxide. The core innovation lies in precise control of a roasting phase, optimization of a silicon-aluminum directional separation process and adaptation of white carbon black roasting parameters. The method not only reduces environmental pollution, but also creates remarkable economic value, and the process is simple, easy to industrialize and suitable for large-scale solid waste resource utilization scenes.

The invention provides a method for continuously synthesizing dimethyl sulfate, which uses the reaction system provided by the invention to continuously synthesize dimethyl sulfate, and comprises the following steps: simultaneously and respectively dissolving and absorbing SO3 and dimethyl ether in crude dimethyl sulfate stored in a primary absorption circulating tank and a primary reaction circulating tank to form two absorption liquids; the method comprises the following steps: respectively absorbing an absorption liquid 1 for absorbing dimethyl ether and an absorption liquid 2 for absorbing SO3, then conveying the absorption liquid 2 into a primary reaction circulating tank for storing the absorption liquid 1, carrying out esterification reaction to generate dimethyl sulfate, and sequentially conveying materials which are not completely reacted into a secondary reaction circulating tank and a secondary absorption circulating tank for continuous reaction. The method is simple in process, energy consumption is reduced, cost is saved, the production problems of running, overflowing, dripping, leaking and the like are completely eradicated through the continuous production technology, and a guarantee is provided for large-scale industrial production.

This invention discloses a coal gangue grouting and filling material with high rheological resistance and resistant to bleeding, its preparation method, and its application, relating to the field of mine filling material technology. The grouting and filling material, by mass percentage, comprises: 70%~75% coal gangue, 0.55%~2.3% composite rheology modifier, and the balance being water; wherein the composite rheology modifier includes an air-entraining agent and a dispersant, with a mass ratio of (90~99):(1~10); the air-entraining agent is a surface-active foaming material, and the dispersant is a phosphate additive. In its preparation, coal gangue is first mixed with water and stirred to obtain an initial slurry; then the air-entraining agent and dispersant are mixed to prepare the composite rheology modifier; finally, the composite rheology modifier is added to the initial slurry and stirred until homogeneous to obtain the grouting and filling material. This grouting and filling material uses coal gangue as the main raw material, has a simple preparation process, and possesses excellent fluidity, stability, and pumpability.

The application provides a preparation method of a suspended film and the suspended film, and the method comprises the following steps: a photoresist spin coating step: spin coating photoresist on a clean and flat substrate; a copper mesh placing step: placing a transmission electron microscope copper mesh on the surface of the photoresist and standing for a period of time; a solidification step: placing the copper mesh, the photoresist and the substrate on a hot plate and solidifying at a certain temperature; a thin film sputtering step: sputtering a thin film with a certain thickness on the surface of the solidified copper mesh, the photoresist and the substrate; and a suspended film obtaining step: placing the obtained thin film, the copper mesh, the photoresist and the substrate in a photoresist stripping solution, dissolving the photoresist and obtaining the suspended film. The application solves the problems of the prior art, such as complex process and strong randomness, and obtains a suspended film with controllable thickness. The application solves the problem of random fishing of the suspended film in the prior art by using the copper mesh as a supporting structure in combination with the removal of the photoresist. The method has a simple process and does not need to be subjected to dry etching and wet etching, and is suitable for the preparation of batch suspended films of various materials.

The invention relates to the technical field of marine antifouling, in particular to a brusatol derivative and application of the brusatol derivative in marine biofouling resistance, and structurally modifies brusatol, which is one of main compounds in plant brucea javanica with wide sources, by utilizing a directional multi-target ligand strategy to obtain the brusatol derivative. Strong anti-pollution active groups (halogen, cyano groups, benzene rings, heterocyclic rings and the like) derived from the ocean are hybridized on a brusatol mother nucleus molecule, and a series of novel brusatol derivatives hybridized with the strongly anti-pollution active groups derived from the ocean are successfully synthesized. The compounds show good anti-barnacle adhesion activity in anti-adhesion experiments of barnacles, and have low toxicity to target organisms. According to the method, the variety of candidate compounds of the anti-fouling agent is enriched, a new way is provided for developing novel and efficient anti-fouling coatings, and the method has good application prospects and industrial value.

The invention relates to a fully mechanized coal face hydraulic support pressure data-based support motion feature classification method, and belongs to the field of fully mechanized coal face coal cutting feature classification. According to the method, original pressure data are smoothed through wavelet denoising, and the data are divided into three stages of initial supporting, working and unloading by using a change point detection technology. Then, extracting features such as an average value, a standard deviation and entropy of each stage, performing unsupervised learning by using a Gaussian mixture model, and classifying each stage into a primary supporting stage, a working stage or an unloading stage; according to the method, a large amount of manual marking training data is not needed, high-precision support motion state information can be provided under complex and changeable underground conditions, abnormal conditions can be found in time, safety accidents are prevented, the number of coal cutting circulation times is automatically counted, the working mode of the hydraulic support is optimized, and the production efficiency is improved.

This invention discloses a hydrogen-assisted rechargeable battery method for hydrogen storage and production, belonging to the field of hydrogen energy storage and electrochemical energy storage technology. The method includes four core steps: battery assembly, circulating electrolyte supply, charging for hydrogen storage, and discharging for hydrogen production. During charging, hydrogen-containing gas is introduced into the cathode, where a hydroxide reaction occurs, and metal ion reduction and deposition occur at the anode, storing hydrogen energy as a metallic element in a solid state under normal pressure. During discharging, a metal oxidation and dissolution reaction occurs at the anode, and a hydrogen evolution reaction occurs at the cathode, generating hydrogen gas in situ and releasing hydrogen energy on demand. This invention eliminates the oxygen evolution reaction of traditional water electrolysis, using hydroxide coupled with metal oxidation-reduction to achieve hydrogen energy storage and release. It offers high storage safety, low reaction overpotential, high energy efficiency, and good cycle reversibility, solving the problems of poor safety, high energy consumption, and low energy efficiency in existing hydrogen storage technologies. It can be widely applied to renewable energy hydrogen production, large-scale hydrogen energy storage, and distributed hydrogen energy supply scenarios.

The invention belongs to the technical field of potential fingerprint and DNA (deoxyribonucleic acid) detection, and particularly relates to an aggregation-induced emission-based potential fingerprint rapid fluorescence visualization display method. The method comprises the following steps: preparing a tracer agent by adopting a fluorescent probe, tracing latent fingerprints or saliva and sweat, and then extracting DNA (Deoxyribonucleic Acid) in a trace sample; the fluorescent probe is a terpyridyl zinc complex and / or an imidazole phosphine bipyridyl zinc complex; the fluorescent probe does not emit fluorescence, condensed-state luminescence is generated after the fluorescent probe is combined with fingerprints, saliva or sweat, fluorescence interference recognition of a substrate is avoided, DNA sample extraction and chain extension processes are not affected, meanwhile, the tracer is a pure water phase, damage of an organic solvent to traces of the fingerprints, the saliva or the sweat and DNA fragments is avoided, and the detection requirement is better met.

The utility model relates to the technical field of tungsten filament detection, in particular to an automatic tungsten filament straightness detection device, which comprises a workbench, a clamp, a graduated scale and a cutting device, two ends of a wire are clamped through the clamp, the wire is fixed between a 0 cm point position and a 70 cm point position of the graduation scale, the wire is ensured to be in a vertical state, and the cutting device is arranged on the workbench. Then the multiple wires are uniformly cut at the 50cm point position through the cutting device, the position where the straightness generated after the wires are cut and rebounded and static does not exceed the blue scale is determined to be qualified in the straightness test, the position where the wave crest generated after the wires are cut and rebounded and static does not exceed the vertical scale is determined to be qualified in the wave crest test, and multiple batches of test results can be directly observed; according to the method, independent measurement by using a caliper is not needed, batch observation trend of the straightness and the wave crest can be realized, comparative analysis of the straightness and the wave crest of the wire under different processes can be carried out, the method is simple in process and high in controllability, and the detection time cost is reduced.

This invention proposes a measurement system for ultrasonic-assisted machining tool wear and a method for studying tool wear mechanisms. The measurement system includes a cutting system, a force feedback system, and an imaging system. The cutting system performs ultrasonic-assisted machining on the workpiece. The force feedback system monitors the cutting force data of the cutting tool collected by a force gauge in real time. The imaging system records the machining images of the cutting tool in real time and calculates the tool wear in real time. The method for studying tool wear mechanisms utilizes the above measurement system to perform dry and cooled two-dimensional ultrasonic-assisted cutting processes, respectively, to obtain the tool wear amounts VB and Vb, and calculate the attenuation coefficient α. The obtained attenuation coefficient α is then applied to the dry two-dimensional ultrasonic-assisted cutting process. The beneficial effects of this invention are: this measurement system and research method can observe the tool wear and cutting force during ultrasonic-assisted cutting of difficult-to-machine materials in cooled machining processes, providing a reference for the study of tool wear mechanisms in cooled machining.

The invention discloses a Smart-seq2 library construction method based on a Tn5 transposase complex. The Smart-seq2 library construction method comprises the following steps: preparing a Tn5 transposase complex solution; carrying out reverse transcription and pre-amplification on the prepared Tn5 transposase complex solution to obtain cDNA (complementary deoxyribonucleic acid), and digesting the cDNA; and adding other reagents corresponding to Smart-seq2 library construction into the obtained product to construct an Illumina library so as to obtain the transcriptome library. According to the single cell transcriptome library building method, the advantages of an original Smart-seq2 library building method can be reserved, for example, full-length transcripts are captured, the library building cost can be further reduced, and the higher number of transcriptome differential expression genes can be obtained. The method is simple in process and very low in cost, the cDNA sample broken by the self-made transposase can be as low as 10 yuan / sample, very difficult technical operation is not needed, and the method is easy to implement and wide in application in various laboratories.

The present invention discloses a laboratory segmented hydraulic fracturing device and a fracturing method, the device comprising: N fracturing tubes connected in sequence by threads; a concave groove is provided in the middle of the fracturing tube, and a number of fracturing tube water outlet holes are evenly distributed on the concave groove; N-1 perforated spacers are respectively placed at the connection of the fracturing tubes; N-1 water injection pipes, the right ends of the N-1 water injection pipes extend out of the rightmost fracturing tube, and the left ends of the N-1 water injection pipes are respectively located in the N-1 fracturing tubes on the left; a water injection pump, the water injection pump is arranged on the right side of the water injection pipe. The present invention can realize the segmented hydraulic fracturing test by connecting the water injection pipes at different positions only by the water injection pump; the method provided by the present invention adopts the anchor glue as the binder, so that the bonding between the natural rock block and the segmented hydraulic fracturing device is good, and the phenomenon of liquid cross-linking and liquid leakage generated during the fracturing process can be avoided, thereby improving the success rate of the test. The method provided by the present invention has a simple process, is easy to operate, and is suitable for laboratory test requirements.

The present application relates to the technical field of tire rubber material performance detection, and particularly relates to a method and system for predicting tire wet ground grip performance based on tread rubber material indexes. Six indexes are selected: A1 (low temperature tan delta area), A2 (E" peak value and peak temperature T*), B1 (small strain G" area), C1 (surface energy polarity component), C2 (retreating contact angle), and D1 (0 DEG C storage modulus), which are subjected to minimum-maximum standardization and fixed weight synthesis WGI, and the weight correction of A2 in the 0-8 DEG C peak temperature window is implemented; then linear calibration is established with the whole tire wet grip index G obtained according to ISO 23671, and the predicted G and grade (A / B / C) are output. The method is universal in equipment and simple in process, can quickly distinguish the pros and cons of the formula on a small sample scale in the laboratory, reduce road test, and improve batch consistency.

The application discloses a directional oxidation recovery method of phosphorus-containing iron waste, and relates to the technical field of resource utilization of waste lithium ion batteries. The method comprises the following steps: S1, directional oxidation transformation: mixing lithium iron phosphate waste with a composite transformation agent, and then performing roasting treatment in an oxidation atmosphere to obtain a roasting product; S2, magnetic separation for removing iron: performing magnetic separation on the roasting product to obtain iron concentrate and non-magnetic material containing lithium and phosphorus; and S3, product preparation: mixing the non-magnetic material containing lithium and phosphorus with an acidic leaching solution to perform a leaching reaction, performing solid-liquid separation after the reaction, and obtaining a lithium and phosphorus-rich leaching solution; adjusting the pH value of the lithium and phosphorus-rich leaching solution, and then performing evaporation concentration and cooling crystallization to obtain a lithium dihydrogen phosphate product. Through coupling of directional oxidation transformation and selective leaching, the application realizes efficient extraction of lithium and phosphorus elements and physical separation of iron components, and realizes efficient short-range recovery of lithium iron phosphate waste.

The invention provides a method for recycling all components of a lithium iron phosphate waste material, which comprises the following steps: mixing the lithium iron phosphate waste material with an acid leaching solution, carrying out first-stage leaching, carrying out solid-liquid separation to obtain a first leaching solution and a first leaching residue, and removing impurities from the first leaching solution to obtain a lithium-rich solution; mixing the first leaching residues with an alkaline leaching solution, carrying out second-stage leaching, carrying out solid-liquid separation to obtain a second leaching solution and second leaching residues, and carrying out impurity removal on the second leaching solution to obtain a phosphorus-rich solution; mixing the lithium-rich solution with the phosphorus-rich solution, carrying out precipitation reaction, and carrying out solid-liquid separation to obtain lithium phosphate and a precipitation mother solution; and mixing the second leaching residue with a precipitation mother solution, carrying out third-stage leaching, carrying out solid-liquid separation to obtain an iron-rich solution, and carrying out evaporative crystallization on the iron-rich solution to obtain the iron-containing product. According to the method disclosed by the invention, efficient separation and all-component closed-loop recovery of lithium, phosphorus and iron elements are realized through a coupling synergistic process of step-by-step precise leaching, directional precipitation and internal circulation collaboration.

The application discloses a method for synthesizing chlorinated phenol by catalytic chlorination, which comprises the following steps: reacting phenol with mixed gas of chlorine and air in water in the presence of a catalyst to obtain a chlorination reaction liquid, and then performing liquid separation and distillation dehydration on the chlorination reaction liquid to obtain a chlorinated phenol product. The method uses phenol as a raw material, and the reaction of the phenol with the mixed gas of chlorine and air in the presence of the catalyst can obviously improve the reaction rate while obtaining a higher reaction selectivity. After the improvement, pure oxygen and concentrated hydrochloric acid are no longer used, and a large amount of phenol-containing hydrochloric acid by-product is no longer generated, and the product quality and the product yield are greatly improved, and the method is more suitable for industrial large-scale production.

The invention belongs to the technical field of precious metal resource recovery, and discloses a light-assisted method for recovering gold from a solution containing trivalent gold ions, which comprises the following steps: S1, mixing the solution containing trivalent gold ions with an adsorbent, and fully stirring under the illumination conditions that the wavelength is 380-780 nm and the intensity is 5-10000 W / m < 2 > until the adsorption reaction is finished; s2, performing ultrasonic treatment and centrifugation on the reactants to obtain dispersion liquid of the elemental gold and the adsorbent; and S3, the dispersion liquid of the adsorbent is repeatedly utilized, and the gold elementary substance solid is recycled. Wherein the adsorbent is a polymer and a derivative of dopamine, polydopamine, melanin and melanin-like. The method has the remarkable advantages of being simple in step, low in cost, environmentally friendly, safe, high in adsorption capacity, high in recovery rate and the like, ultrahigh adsorption capacity and selectivity on gold ions can be achieved, the method is simple and convenient in process and good in material reusability, and good application prospects are achieved.

The application provides a Yunnan red soil-based composite porous ceramsite and a preparation method and application thereof, and the preparation method of the Yunnan red soil-based composite porous ceramsite comprises the following steps: mixing Yunnan red soil particles, sepiolite powder and biomass powder to obtain a mixture; granulating the obtained mixture into balls after stirring the mixture uniformly with water to obtain green balls; and drying and calcining the obtained green balls at high temperature to obtain the composite porous ceramsite. The Yunnan red soil, sepiolite and biomass are mixed and granulated, and then calcined into the ceramsite, the ceramsite has the advantages of a large specific surface area, a high porosity, good adhesion of microorganisms on the surface and a high bacterial abundance, and can achieve a good denitrification effect; and the high-calcium minerals contained in the ceramsite are beneficial to combination with phosphorus to generate precipitates with a smaller solubility product, and the ceramsite also has a good phosphorus removal effect; therefore, when the composite porous ceramsite is used for sewage treatment, not only is the treatment effect good and the purification efficiency high, but also the wastewater can be discharged up to the standard, and the composite porous ceramsite has high practicability.