4381 results about "O-Phosphoric Acid" patented technology

A forest fire retardant composition contains a retardant compound that includes a potassium salt. The potassium salt may include a potassium salt of an organic acid, a potassium salt of an inorganic acid, or mixtures thereof. The organic acid may include formic acid, acetic acid, propanoic acid, butanoic acid, lactic acid, oxalic acid, malic acid, gluconic acid, tartaric acid, uric acid, malic acid, or citric acid. The inorganic acid may include sulfuric acid, phosphoric acid, carbonic acid, or hydrochloric acid. The composition may be in the form of a dry concentrate, a liquid concentrate, or a final diluted product. The final diluted product is effective in suppressing, retarding, and controlling forest fires while exhibiting corrosion resistance and low toxicity.

The invention discloses an ultra-aeration air flotation system and an implementation method thereof, and belongs to the technical field of wet-process phosphoric acid production, and the ultra-aeration air flotation system comprises a reaction tank, an inclined guide plate arranged on the inner wall of the reaction tank, a dish-shaped tank which is arranged at the bottom of the reaction tank and is annularly arranged around the center of the reaction tank, and a central island which is formed by protruding the inner ring part of the dish-shaped tank at the bottom of the reaction tank, the aeration mechanism is arranged on the central island and is communicated with the outside through a pipeline; the transmission mechanism is arranged above the reaction tank; the central transmission rod is connected with the output end of the transmission mechanism and is arranged along the axis of the reaction tank; the dynamic settler is arranged at the upper part in the reaction tank and is connected with the central transmission rod; and the overflow port is matched with the dynamic settler. The inclined guide plate, the dish-shaped aeration structure and the dynamic settler are integrally arranged in the reaction tank, so that the super-aeration uniformity, the foam separation capacity, the phosphoric acid purification and the liquid vortex intensity in the wet-process phosphoric acid production process are remarkably enhanced, and the reaction efficiency and the product quality are improved.

The invention discloses battery-grade iron phosphate and a preparation method and application thereof.The method comprises the steps that 1, waste iron sheets are ground into iron powder to be mixed with a phosphoric acid solution, reduced iron powder, ascorbic acid and chloramine-T are added in the mixing process for a reaction, solid-liquid separation is conducted after the reaction, a ferrous dihydrogen phosphate solution is obtained, and the pH of the ferrous dihydrogen phosphate solution is 1.5-3.0; and (2) oxidizing the ferrous dihydrogen phosphate solution into iron phosphate in one step by adopting an oxidizing agent, carrying out solid-liquid separation to obtain an iron phosphate solid, washing and drying the iron phosphate solid, and roasting in an inert atmosphere environment to obtain the battery-grade iron phosphate. According to the invention, the use of high-cost reduced iron powder is reduced, and the produced iron phosphate has the characteristics of high iron-phosphorus ratio and high tap density, has certain carbon content, and has a wide prospect in the application of lithium iron phosphate.

The invention relates to a high-temperature proton exchange membrane, in particular to a high-temperature proton exchange membrane based on silica cross-linked polybenzimidazole and a preparation method of the high-temperature proton exchange membrane. The preparation method comprises the following steps: polymerizing 3, 3 '-diaminobenzidine, 4, 4'-diphenyl ether dicarboxylic acid and 5-hydroxyisophthalic acid to form a polybenzimidazole main chain containing an ether bond and a phenolic hydroxyl group, grafting a silane coupling agent on the polybenzimidazole main chain, and finally carrying out membrane formation and acid catalysis treatment to obtain the high-temperature proton exchange membrane based on silica crosslinked polybenzimidazole. A silicon-oxygen network structure is introduced into a polybenzimidazole main chain, so that the phosphoric acid retention rate and the oxidation resistance of the polymer film can be effectively improved, and the service life of the polymer film is prolonged.

The invention relates to the technical field of phosphoric acid production control, solves the problem that in the prior art, accurate control over the whole process of phosphoric acid production cannot be achieved, and provides a multivariable model prediction control method and system for the whole process of phosphoric acid production. The method comprises the following steps: acquiring key process data of a plurality of process units in the whole phosphoric acid production process in real time; preprocessing the key process data to obtain real-time standardized data; establishing a soft measurement model according to a pre-collected historical standardized data set; inputting the real-time standardized data into the soft measurement model to obtain a soft measurement predicted value; constructing a multivariable dynamic model according to the historical standardized data set and the soft measurement predicted value; according to the multivariable dynamic model, in combination with a model prediction control algorithm, obtaining target set values of a plurality of preset operation variables; and according to the target set value, realizing control of the whole process of phosphoric acid production. According to the invention, accurate control of the whole process of phosphoric acid production can be realized.

The invention provides a method for preparing VOSO4 electrolyte through gas enhanced reduction and reverse extraction, which comprises the following steps: adding an extraction inhibitor into an acidic vanadium-containing solution, stirring and reacting to obtain a vanadium-containing solution, the extraction inhibitor being phosphoric acid and / or a phosphoric acid compound; adjusting the pH value of the solution to 0.5-3.0 by using sulfuric acid, mixing with an organic phase, extracting, and separating liquid to obtain a vanadium-loaded organic phase; washing the vanadium-loaded organic phase with dilute sulfuric acid; a stripping agent and the vanadium-loaded organic phase are mixed for stripping, meanwhile, gas is introduced for strengthening the stripping process, and a no-load organic phase and a vanadium electrolyte are obtained; and the vanadium strip liquor is subjected to galvanic pile electrolysis adjustment, and the vanadium electrolyte with the valence state meeting the standard is obtained. The invention provides a novel process for directly preparing the vanadyl sulfate electrolyte through gas reinforced reduction, and the novel process has the advantages of being simple in process, easy to operate, low in cost and environmentally friendly.

The invention relates to the technical field of preparation of iron phosphate materials, in particular to a method for doping iron phosphate with titanium, which comprises the following steps: 1, dissolving a titanium dioxide by-product ferrous sulfate powder in water to prepare a titanium-containing iron source solution; 2, adding water into the reaction kettle, and stirring; 3, adding the titanium-containing iron source solution, the phosphorus source solution, ammonia water and an oxidizing agent into a reaction kettle to prepare primary slurry; 4, carrying out filter pressing on the primary slurry, washing until the conductivity is less than or equal to 2000us / cm, and then adding water to prepare secondary slurry; 5, phosphoric acid is added into the reaction kettle for bottoming, and the temperature is increased to 60-70 DEG C; 6, adding the secondary slurry into the reaction kettle, and carrying out heat preservation reaction on the secondary slurry and phosphoric acid; and 7, filtering the reaction product obtained in the step 6, washing until the conductivity is less than or equal to 500us / cm, and then drying and sintering. According to the method, the titanium doping technological process is simplified, and meanwhile the titanium element utilization rate in the titanium dioxide by-product and the purity of the titanium-doped iron phosphate product are improved.

The invention discloses an anti-scale cross-linked polymer fracturing fluid and a preparation method thereof, and relates to the technical field of petroleum fracturing fluids. When the anti-scale cross-linked polymer fracturing fluid is prepared, allylamine hydrochloride and epoxy chloropropane react to prepare a double-bond chlorinated intermediate; reacting the double-bond chlorinated intermediate with lauramidopropyl dimethylamine to prepare a cationic monomer; copolymerizing a cationic monomer and acrylamide to prepare a cationic polymer; the preparation method comprises the following steps: reacting L-lysine with formaldehyde and phosphorous acid to prepare phosphoric acid modified lysine; reacting the phosphoric acid modified lysine with allyl glycidyl ether to prepare a phosphoric acid modified monomer; acrylamide and an anionic monomer are copolymerized to prepare an anionic polymer; the anionic polymer and the cationic polymer are dissolved in water to prepare the anti-scale cross-linked polymer fracturing fluid. The anti-scale cross-linked polymer fracturing fluid prepared by the invention has the advantages of scale prevention, good temperature resistance, good shear resistance and self-crosslinking.

The invention relates to the technical field of catalysts, and discloses a preparation method of a supported catalyst for catalytic cracking oil slurry hydrogenation, and the preparation method comprises the following steps: S1, adding a phosphorus-containing compound into a carrier for modification: putting the carrier, phosphate and phosphoric acid into a round-bottom flask, adding water, and stirring for reaction to obtain a P element modified carrier; s2, dissolving a main active component of the catalyst in deionized water, then slowly adding into the P element modified carrier prepared in the step S1, and reacting to obtain a carrier loaded with the catalyst; and S3, roasting the catalyst-loaded carrier prepared in the step S2 to obtain the supported catalyst. According to the supported catalyst, a phosphorus compound modified carrier is adopted, and Ni-W-Mo or Ni-W active metal components are supported. The acid site of the carrier is optimized by adding the phosphorus element, and the surface acidity and the acid amount of the catalyst are optimized and adjusted by using a preparation process combining a microwave method and a co-impregnation method, so that the thermal stability of the catalyst is improved.

The invention discloses a deep arsenic removal device for phosphoric acid and an arsenic removal process thereof, and relates to the technical field of efficient arsenic removal in phosphoric acid, the deep arsenic removal device comprises an automatic feeding continuous arsenic removal reactor, under the cooperation of a temperature control heating assembly, an arsenic biosensor, a material removal driving motor, a rotating rod, a drying rake blade and a heat conduction rod, the position of a microwave heating source is adjusted, and the arsenic removal efficiency is improved. The microwave heating is more accurate through the intelligent control of the microwave power, and the microwave heating is combined with the internal drying rake blade stirring system, so that the heating efficiency of the material is improved, the uniform mixing of the material is promoted, the temperature change of different areas in the automatic feeding continuous arsenic removal reactor can be adapted, and the continuous arsenic removal effect is improved. According to the technical scheme, the uniformity and controllability of reaction conditions are guaranteed, the heat conduction rods arranged in an array mode can quickly respond to temperature changes, uniform distribution of heat is achieved, local overheating is avoided, meanwhile, the heat conduction path can be flexibly adjusted according to requirements, and the temperature uniformity in the automatic feeding continuous arsenic removal reactor is guaranteed.

The invention discloses a double-block polymeric monomer, a preparation method thereof and a polycarboxylic acid water reducing agent which uses the double-block polymeric monomer and is suitable for low-carbon cement. The polycarboxylate superplasticizer is formed by copolymerization of a double-block polymeric monomer A, an unsaturated carboxylic acid monomer B and a polymerizable phosphoric acid monomer C through free radicals, wherein the double-block polymeric monomer A is a polymeric monomer composed of an unsaturated multi-element heterocyclic chain segment near a double-bond end and a polyether polyol acrylate chain segment far away from the double-bond end. The polycarboxylic acid water reducing agent is suitable for low-carbon cement, solves the problems of weak dispersion and poor adaptability of the existing water reducing agent in the application process of the low-carbon cement, and is more suitable for low-carbon cement concrete containing various complex admixtures such as slag, clay and the like.

The invention relates to a phosphoric acid pyrophosphate composite polyanionic positive electrode material for a sodium-ion battery, a preparation method and application of the positive electrode material in the sodium-ion battery. The pyrophosphate composite polyanionic positive electrode has a structure as shown in a formula I: Na4Fe3-x-1. 5y-zMnxVyAz (PO4) 2P2O7 (at) C; when the pyrophosphate composite polyanionic positive electrode has the structure as shown in the formula I, x is more than 1.5 and less than 2.8; and 2) A is selected from one or two of Mg < 2 + >, Al < 3 + >, Cr < 3 + >, Ga < 3 + >, Co < 2 + >, Ni < 2 + >, Cu < 2 + >, Zn < 2 + >, Ge < 2 + >, Zr < 4 + >, Nb < 3 + / 4 + >, Mo < 3 + >, In < 3 + >, Sn < 4 + >, Sb < 3 + >, Te < 4 + >, Ce < 4 + >, Pr < 4 + >, Nd < 3 + >, Pm < 3 + >, Ta < 3 + / 4 + >, W < 4 + >, Bi < 5 + >, Po6 < + >, Cm < 4 + > and Bk < 4 + >. The ionic conductivity and the electronic conductivity of the material are improved through unit cell structure regulation and

The invention discloses a production method of ferrous dihydrogen phosphate, which comprises the following steps of: changing an iron source of iron-process iron phosphate from traditional iron blocks or iron powder into oxide scale, compounding phosphoric acid and sulfuric acid into mixed acid, and controlling the granularity of the oxide scale and the components and acidity of the mixed acid to solve the problems of dissolution and passivation of the oxide scale. According to the method, iron oxide scale can be better dissolved, the residual problem of ferric ions is solved by reducing excessive iron blocks or iron powder, undissolved impurities such as carbon, silicon and iron are removed by filtering, and finally, the stability problem of a reaction system is solved by adjusting the pH value of the system through industrial phosphoric acid and pure water, so that a ferrous dihydrogen phosphate solution required for producing iron phosphate is obtained. The production cost of an iron source required by iron phosphate is greatly reduced, other impurities are not contained, and mixed acid-containing filtrate and washing water generated in the production process can be recycled through an evaporation device.

The invention discloses a composite water purifying agent based on polyaluminum ferric sulfate. The preparation process comprises the following steps: 1, reacting ferrous sulfate heptahydrate, aluminum sulfate, sodium chlorate, phosphoric acid and the like to prepare a polyaluminum ferric sulfate solution; 2, mixing the modified polyacrylamide solution with the polyaluminum ferric sulfate solution for reaction to obtain a composite system; and step 3, adding acidic ochre soil into the composite system to obtain the composite water purifying agent. The preparation method has the beneficial effects that a modified monomer is prepared through organic synthesis, and the modified monomer is copolymerized with monomers such as acrylamide to prepare modified polyacrylamide; then, the organic polymer is compounded with a polyaluminum ferric sulfate solution and acidic ochre soil, and an inorganic-organic-mineral ternary water purification system is constructed; the composite water purifying agent has the high-efficiency electricity neutralization capability of an inorganic flocculating agent, the bridging flocculation effect of organic macromolecules and the adsorption performance of minerals, and shows excellent flocculation and sedimentation effects and pollutant removal capability.

The invention belongs to the technical field of phosphoric acid purification, and particularly relates to a removing agent and a removing method for heavy metal cadmium in phosphoric acid. The removing agent comprises a solvent, a thiophosphoric acid trapping agent A and a thiophosphoric acid trapping agent B, wherein the thiophosphoric acid trapping agent A and the thiophosphoric acid trapping agent B are dispersed in the solvent; the thiophosphoric acid trapping agent A and the thiophosphoric acid trapping agent B are different types of thiophosphoric acid trapping agents and are respectively and independently selected from one of alkyl dithiophosphoric acid or salts thereof, phenolic dithiophosphoric acid or salts thereof and amino dithiophosphoric acid or salts thereof; and at least one hydrocarbyl dithiophosphoric acid or salt thereof is selected; the salt is sodium salt or ammonium salt; the solvent is water or an alkaline aqueous solution. According to the method, a composition of a dithiophosphoric acid trapping agent is used as a removing agent for cadmium in wet-process phosphoric acid, a precipitate which is insoluble in a strongly acidic water phase is generated after reaction, and phosphoric acid cadmium removal is realized after filtration. Compared with a conventional sulfide precipitation method, the method provided by the invention has the advantages of less cadmium residue in phosphoric acid and less pollution.

The present application discloses a method for recovering battery-grade iron phosphate and lithium salts from lithium iron phosphate waste materials and its application, comprising the following steps: S100, dissolving the lithium iron phosphate waste materials with a phosphoric acid solution, filtering to obtain a waste material dissolution solution; S200, adding an acid solution and an oxidant to the waste material dissolution solution to obtain a crystallization stock solution; S300, diluting the crystallization stock solution with water until its pH value is 1.0 to 1.5, and performing high-temperature crystallization to obtain hydrated iron phosphate and a lithium-containing filtrate; S400, roasting the hydrated iron phosphate to obtain battery-grade iron phosphate; S500, removing water from the lithium-containing filtrate to obtain solution a, circulating solution a to dissolve the lithium iron phosphate waste materials, and concentrating to obtain lithium salts. The present application uses a phosphoric acid solution as the leaching solvent, does not require the use of an alkali solution subsequently and can be leached cyclically, improving the economic benefits while enabling the efficient recovery of all elements of Li, Fe, and P, and also capable of obtaining a battery-grade iron phosphate product with an iron-to-phosphorus ratio meeting the requirements.

The preparation method comprises the following steps: S1, preparing a phosphoric acid solution, a hydrogen peroxide solution, a Ti salt, a phosphor salt solution and a ferrite solution; s2, Ti salt and the ferrite solution are mixed, and a titanium iron salt solution is obtained; mixing the phosphoric acid solution and the phosphorus salt solution to obtain a phosphorus source solution; s3, adding the titanium iron salt solution into a reaction kettle, and adding the hydrogen peroxide solution; s4, adding the phosphorus salt solution into the reaction kettle to obtain yellow slurry; s5, after the color of the slurry is heated to be white, white slurry is obtained; s6, carrying out solid-liquid separation on the white slurry to obtain an iron phosphate dihydrate filter cake; and S7, drying and calcining the iron phosphate dihydrate filter cake to obtain the Ti-doped battery-grade anhydrous iron phosphate. The titanium-doped iron phosphate is firstly prepared by a one-step method, the pH value of the reaction system is controlled by controlling the molar ratio of the iron element to all phosphorus elements in total phosphorus, ammonium phosphate and phosphoric acid in the reaction system, and the retention of the Ti element in the finished product and the regulation and control of the iron-phosphorus ratio in a specified range are ensured.

The invention provides a phosphoric acid doped polybenzimidazole high-temperature proton exchange membrane and a preparation method thereof. In the membrane material, the range of the mass fraction of the phosphoric acid in the polybenzimidazole polymer is greater than 0 wt.% and not greater than 3000 wt.%. The membrane is prepared by the following steps: S1, dissolving a polybenzimidazole polymer in a solvent, and adding phosphoric acid to obtain a composite solution; and S2, casting the composite solution onto a membrane forming container, and drying to obtain the phosphoric acid doped polybenzimidazole high-temperature proton exchange membrane. The phosphoric acid doped polybenzimidazole high-temperature proton exchange membrane not only can be used for preparing HT-PEM without internal stress so as to prevent loss of phosphoric acid, but also can be used for randomly and accurately controlling the phosphoric acid doping amount and thickness of the prepared membrane through the composition and volume of the solution; therefore, the phosphoric acid doped polybenzimidazole composite HT-PEM without internal stress, which has high stability and ultrahigh specific proton conductivity, is prepared.

The invention provides a method for recovering waste etching liquid containing phosphoric acid, acetic acid and nitric acid, which comprises the following steps: carrying out reduced pressure distillation on the waste etching liquid under a reduced pressure condition, distilling and condensing light components of nitric acid and acetic acid to obtain mixed acid liquor of acetic acid and nitric acid, and detecting the content of nitric acid, acetic acid and water in the mixed acid liquor; adding sodium hydroxide or potassium hydroxide and the like into mixed acid liquor of acetic acid and nitric acid, so that all nitric acid in the mixed acid liquor generates nitrate; and adding acetic anhydride into the acetic acid-containing mixed solution, fully reacting, filtering the separated salt, adding an extracting agent into the filtrate, and collecting the high-purity acetic acid. According to the method, phosphoric acid, acetic acid and nitrate in the waste etching liquid are recycled, the recycled acetic acid is high in purity, high in recycling rate and high in operability, large-scale production can be met, resource recycling is achieved to the maximum extent, direct emission of non-phosphorus resources of the waste etching liquid is avoided, and resource waste and environmental pollution are avoided.

The invention relates to the technical field of polyethylene cables, in particular to a high-strength flame-retardant polyethylene cable and a preparation method thereof.The high-strength flame-retardant polyethylene cable is composed of a copper stranded wire core and a flame-retardant protective layer on the surface of the copper stranded wire core; the flame-retardant protective sleeve is made of a high-strength flame-retardant material; the high-strength flame-retardant material comprises the following components in parts by weight: 80-100 parts of low-density polyethylene, 5-10 parts of a flame retardant, 3-5 parts of a performance additive, 1-1.5 parts of filler, 0.1-0.2 part of a voltage stabilizer, 0.1-0.5 part of an antioxidant, 0.5-1 part of an initiator and 1-5 parts of a lubricant. The amino group on the surface of the silicon dioxide carrier treated by 3-aminopropyltriethoxysilane in the modification additive can be subjected to acid-base interaction with the phosphate group of APP to form chemical bridging; the interface bonding enables the APP and the modification additive to synchronously migrate to the surface of the material during combustion to cooperatively construct a protection layer, so that the problem of protection failure caused by migration rate difference of different flame retardants in a traditional flame-retardant system is solved, and the flame-retardant performance of the cable can be greatly improved.

The invention provides phosphorus-doped hydrothermal synchronously-activated hierarchical pore green biochar, a preparation method thereof and application of the phosphorus-doped hydrothermal synchronously-activated hierarchical pore green biochar in formaldehyde adsorption, and belongs to the technical field of biomass resource high-value utilization and air pollution control. The preparation method comprises the following steps: mixing a biomass raw material with a phosphoric acid catalyst, carrying out hydrothermal carbonization reaction, carrying out solid-liquid separation on a reaction product after the reaction is finished, collecting a solid-phase material, drying, mixing with potassium hydroxide, activating, washing and drying the obtained product, and thus obtaining the phosphorus-doped hydrothermal synchronously-activated hierarchical porous green charcoal. Phosphoric acid is introduced in the hydrothermal stage to serve as a structure-directing agent and a doping source, uniform doping of phosphorus and coordinated regulation and control of a pore structure are achieved, a hierarchical pore channel system is formed in the subsequent activation process, and the physical adsorption and chemical fixation capacity of the biochar to formaldehyde molecules is greatly improved.

The present invention relates to a composite high-temperature proton exchange membrane, a preparation method thereof, and an application thereof. The preparation method of the composite high-temperature proton exchange membrane comprises the following steps: S1. Mix a polymer represented by formula (I), a polymer represented by formula (II), and a solvent to obtain a casting solution, pour it, and dry it to obtain a composite film; S2. Immerse the composite film obtained in step S1 in an alkaline solution of borax, wash it, dry it, and then adsorb phosphoric acid to obtain the composite high-temperature proton exchange membrane. The composite high-temperature proton exchange membrane prepared by the preparation method of the present invention still maintains good proton conductivity / has high proton conductivity, has a high peak power density, and has high tensile strength and high phosphoric acid retention rate under the condition of low phosphoric acid adsorption amount.

The invention discloses a phosphorus-nitrogen flame retardant and a preparation method and application thereof.The preparation method of the flame retardant comprises the steps that phosphoric acid is added into a PEPA solution, and after a heating reaction, the mixture is cooled to the room temperature; and adding urea, carrying out secondary heating reaction, and washing, separating and drying after the reaction is finished. The prepared flame retardant not only can significantly improve the flame retardant property and thermal stability of cotton fabrics, but also has good environmental friendliness and practical application potential, and provides a new idea for development of high-performance flame-retardant cotton fabrics.

The invention belongs to the field of hydrometallurgy, and particularly relates to a method for extracting niobium and / or scandium in a phosphoric acid solution system, which is characterized in that the phosphoric acid solution system containing niobium and / or scandium and an extraction organic phase are subjected to auxiliary extraction under a composite field of ultrasonic-magnetic field to obtain a loaded organic phase. Innovative research shows that extraction is carried out under an ultrasonic-magnetic field composite field, the final physicochemical characteristics of niobium-scandium in a phosphoric acid solution can be adapted accidentally, excellent extraction capacity can be obtained accidentally, and especially excellent scandium-niobium separation selectivity can be obtained under a composite phosphoric acid system containing niobium and scandium.

The invention discloses a heat dissipation type anti-corrosion coating and a preparation method thereof, and belongs to the technical field of anti-corrosion coatings. The heat dissipation type anticorrosive paint comprises a component A and a component B, wherein the component A comprises the following components in parts by mass: 100 parts of heat-conducting water-borne epoxy resin, 4-6 parts of graphene, 0.3-0.5 part of an antioxidant, 0.2-0.4 part of a defoaming agent, 0.2-0.4 part of a flatting agent and 10 parts of first deionized water; the component B comprises the following components in parts by mass: 10-20 parts of a curing agent, 40-60 parts of a toughening agent, 4-6 parts of functionalized boron nitride microspheres and 30-50 parts of second deionized water; the heat-conducting water-borne epoxy resin is 1, 5-naphthalene diphenol modified water-borne epoxy resin; the curing agent is an aromatic amine curing agent; the toughening agent is obtained by carrying out copolymerization on acrylamide, N-(4-aminophenyl) acrylamide, 1, 3, 5-triacryloyl-s-triazine and 3-dimethylamino allyl phosphoric acid; the functionalized boron nitride microspheres are boron nitride microspheres modified by 4-aminobenzoic acid.

The invention discloses a method for directly and selectively extracting indium from a high-iron indium-containing solution without reduction, which comprises the following steps: mixing the high-iron zinc indium-containing solution obtained by acid leaching of zinc oxide with a composite extractant, extracting, separating to obtain an indium-iron-containing organic phase, adding a detergent into the indium-iron-containing organic phase for washing, and separating to obtain a zinc-removed indium-iron-containing organic phase, the method comprises the following steps: adding a composite extractant into a high-iron-zinc indium-containing solution, then adding a stripping agent to carry out indium stripping to obtain an indium-containing stripping solution so as to realize the separation of indium in the high-iron-zinc indium-containing solution, and the composite extractant consists of 10-40% by volume of a phosphate extractant A, 5-20% by volume of a phosphoric acid synergistic extractant B and 40-85% by volume of sulfonated kerosene. According to the method, ferric iron does not need to be reduced, the indium-iron separation coefficient is high, extraction is not prone to emulsification, and the indium recovery rate is high.

The present invention provides a high temperature resistant inorganic glue, a preparation method, an application and a method for limiting the drift of CVD seed crystals. The high temperature resistant inorganic glue comprises: 100 to 400 parts by weight of aluminum silicate; 50 to 200 parts by weight of aluminum phosphate; 50 to 400 parts by weight of copper oxide-copper-titanium-diamond composite material or copper oxide-titanium-diamond composite material; 50 to 200 parts by weight of phosphoric acid; and 100 to 400 parts by weight of a dispersant. The method for limiting the drift of CVD diamond seed crystals is to apply a high temperature resistant inorganic glue on the bottom of the CVD diamond seed crystal before the chemical vapor deposition growth of the CVD diamond seed crystal, press it flat on a molybdenum sheet and solidify it. The high temperature resistant inorganic glue of the present invention can withstand temperatures above 1200°C and is easy to glue and remove; the CVD diamond seed crystal is bonded to the molybdenum sheet by the high temperature resistant inorganic glue, and the seed crystal drift is limited during chemical vapor deposition growth.

The invention relates to a method for extracting tungsten and molybdenum from low-grade tungsten-molybdenum ore, belongs to the technical field of non-ferrous metal hydrometallurgy, and solves the problems of harsh conditions, low extraction efficiency, high cost and environmental pollution when tungsten and molybdenum are extracted from low-grade tungsten-molybdenum ore in the prior art. The method comprises the following steps: leaching the low-grade tungsten-molybdenum ore by adopting sulfuric acid, and carrying out solid-liquid separation to obtain a leaching solution and leaching residues; extracting molybdenum from the leachate by adopting a cationic extraction agent to obtain tungsten-containing molybdenum extraction raffinate and a negative molybdenum organic phase; and extracting tungsten from the tungsten-containing molybdenum extraction raffinate by adopting a neutral extraction agent to obtain tungsten extraction raffinate and a negative tungsten organic phase. The method is carried out at normal temperature and normal pressure, the complexing characteristic of molybdenum to tungsten in the low-grade tungsten-molybdenum mixed ore under the acidic condition is ingeniously utilized, synergistic leaching of tungsten and molybdenum is achieved, the tungsten and molybdenum extraction efficiency is high, operation is easy and convenient, complexing agents such as phosphoric acid do not need to be added, and the leaching cost is greatly reduced; and the method is clean and environment-friendly, and development and utilization of low-grade tungsten-molybdenum ore are promoted.

This invention belongs to the field of wastewater treatment technology, specifically relating to a method for removing metallic impurities from acidic copper-containing etching wastewater at room temperature and pressure. The method includes the following steps: S1, adding an oxidant to the acidic copper-containing etching wastewater to conduct an oxidation-reduction reaction, obtaining a pretreatment solution; S2, adding phosphoric acid or soluble phosphate to the pretreatment solution, adjusting the pH to 1.3-1.7 using a pH adjuster, stirring, and filtering to obtain a purified copper-containing solution. The method provided by this invention achieves high removal rates for Fe, Ni, Zn, Ca, and Mg, while maintaining a high copper ion content. It can recycle and regenerate high-purity copper salt products for application in food, cosmetics, medical, electroplating, and other fields, while also reducing hazardous waste generation, improving economic efficiency, and significantly reducing costs.

The invention relates to a method for treating a waste iron phosphate positive electrode material by a phosphoric acid-hydrogen peroxide method matched with a specific complexing agent. The method comprises the following steps: crushing the positive electrode material of the waste lithium iron phosphate battery, adding the crushed positive electrode material into deionized water, and stirring to prepare slurry; heating the slurry, dropwise adding a phosphoric acid-hydrogen peroxide mixed solution and a complexing agent, adding a NaOH solution to adjust the pH value to 3.5, and filtering to obtain a filtrate and a filter cake; adding a NaOH solution into the filtrate, and adjusting the pH value to 10 to obtain lithium phosphate; performing evaporative crystallization on the filter cake to obtain trisodium phosphate; the complexing agent is prepared by adding pentasodium salt of amino trimethylene phosphonic acid, triallyl citrate, epoxysuccinic acid and DMF (Dimethyl Formamide) into a reaction kettle, mixing, adding ammonia water to adjust the pH value to be 10, and distilling to remove the DMF after the reaction is finished. The precipitation rate of Fe reaches up to 99.99%, the leaching rate of Li reaches up to 99.91%, and efficient separation and recycling of lithium and iron are achieved.