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74results about "Silicon halogen compounds" patented technology

A process for purifying and concentrating dilute fluorosilicic acid solution by chemical extraction

ActiveCN117208912BSilicon halogen compounds
This invention discloses a process for purifying and concentrating dilute fluorosilicic acid solution using chemical extraction. The main steps are as follows: 1. Extraction: Dilute fluorosilicic acid and extractant are mixed in a certain ratio for chemical extraction. After extraction, the aqueous phase and the organic phase are separated. 2. Back-extraction: The organic phase and back-extraction solution are mixed in a certain ratio. Under certain operating conditions, fluorosilicic acid is back-extracted from the organic phase to obtain a concentrated fluorosilicic acid solution and raffinate. 3. Raffinate treatment: A saturated solution of soluble heavy metal salt is added to the raffinate in a certain ratio, and a chemical reaction is carried out under certain operating conditions. After the reaction is completed, centrifugation is performed to obtain heavy metal sulfate, which is recovered as a byproduct. The organic phase is then subjected to vacuum distillation to separate the extraction aid. The remaining organic matter is further decomposed by vacuum heating to obtain an organic extractant and inorganic acid vapor. The organic extractant is reused, and the inorganic acid vapor is condensed and recovered. This invention has good purification effect, simple process, and the extractant can be recycled.
Owner:WENGFU (GRP) CO LTD +1

Enhanced treatment method and device for recycling fluorine resources in semiconductor processing wastewater

The invention belongs to the technical field of industrial wastewater treatment and resource recovery, and particularly relates to an enhanced treatment method for recovering fluorine resources in semiconductor processing fluorine-containing wastewater. And step-by-step efficient recovery of sodium fluosilicate and calcium fluoride is realized through cooperation of precipitant compounding and pH regulation. The method comprises the following steps: firstly, adding a NaCl-NaHCO3 composite precipitator and sodium fluosilicate seed crystals to induce crystallization and recover hexagonal prism-shaped sodium fluosilicate single crystals; and after filtering, adding a CaCl2-Ca (OH) 2 composite precipitator and calcium fluoride seed crystals into the filtrate to generate large-particle calcium fluoride. And the impurity content in the recovered product respectively reaches the industrial sodium fluosilicate superior product standard and the metallurgical grade calcium fluoride secondary product standard. And the treated wastewater is neutral or weakly alkaline, so that the subsequent mixed treatment with other wastewater is facilitated.
Owner:JIANGNAN UNIV

Lithium ion halide solid electrolyte as well as preparation method and application thereof

The invention provides a lithium ion halide solid electrolyte, the chemical composition of the lithium ion halide solid electrolyte is LixMa + Nb + yClx + a + by, a is the valence of an element M, and b is the valence of an element N; 1 < = x < = 4, 0lt; y < = 1, 2 < = a < 5, and 2 < = b < = 5. The lithium ion halide solid electrolyte provided by the invention not only has high room-temperature ionic conductivity, but also has relatively good negative electrode contact stability due to relatively low valence. The invention also provides a preparation method of the lithium ion halide solid electrolyte, the raw materials adopted by the method are low in cost, and the synthesis technical route is simple.
Owner:LANZHOU UNIV

Silicon subhalide-containing composite particles

Silicon subhalide-containing composite particles along with processes for producing and uses for the same. Where the silicon subhalide-containing composite particles have a Si content >30% by weight. Wherein the silicon is placed in and on the pores of a porous matrix. The silicon subhalide-containing composite particles include a halogen concentration of 0.0003 to 16% by weight, a pH of 3 to 9, a volume-weighted particle size distribution having diameter percentiles d50 of 0.5 to 20 μm, and a specific BET surface area of at most 170 m2 / g.
Owner:WACKER CHEMIE AG

A method for resourceful treatment of quartz sand pickling waste liquid

The application provides a quartz sand acid washing waste liquid resource treatment method, and belongs to the field of industrial waste water treatment, and comprises the following steps: adding magnetic composite seeds to the quartz sand acid washing waste liquid, and performing magnetic separation after stirring treatment; adding soluble potassium salt to the treated waste liquid to recover potassium fluosilicate; treating the filtrate through diffusion dialysis to obtain recovered acid and dialysis residual liquid; the diffusion dialysis treatment adopts an asymmetric membrane, the asymmetric membrane has a physical gradient of one side being a dense structure and the other side being a loose structure, and the dense structure side is in contact with the waste liquid; and adding calcium oxide or calcium hydroxide to the dialysis residual liquid for deep treatment and calcium recovery. The application provides a quartz sand acid washing waste liquid resource treatment method which is low in treatment cost, high in resource recovery rate and friendly to the environment, and realizes the differentiated resource recovery of the quartz sand acid washing waste liquid.
Owner:SHAANXI HIGH TECH ENVIRONMENTAL PROTECTION TECH CO LTD

Green low-carbon water alkali washing equipment for preparing monochlorodifluoromethane

The utility model discloses green low-carbon water alkaline washing equipment for preparing monochlorodifluoromethane. The green low-carbon water alkaline washing equipment comprises a water washing tower and an alkaline washing tower, the upper end of the water washing tower is communicated with a series pipe, and the other end of the series pipe is communicated with the lower end of the alkaline washing tower; a plurality of grating plates are arranged in the water washing tower and the alkaline washing tower; fillers are arranged on the grating plates; observation windows are arranged on the water washing tower and the alkaline washing tower and are higher than the filler; a heat utilization structure is arranged between the water washing tower and the alkaline washing tower; a waste liquid utilization structure is arranged. According to the utility model, gas led out from the alkaline washing tower enters the heat exchanger to be condensed into liquid, heat release occurs in the process, water in the water storage tank circulates in the heat exchanger, the heat can be utilized and absorbed, the temperature of the water is changed, and the washing effect can be improved when the water enters the water washing and alkaline washing procedure subsequently; and waste liquid flowing out of the water washing tower can be recycled.
Owner:ZHEJIANG LANXI JUHUA FLUORINE CHEM CO LTD

Wet-process phosphoric acid defluorination residue recycling coupling device and production method

The invention discloses a wet-process phosphoric acid defluorination residue recycling coupling device and a production method, the coupling device is arranged in a wet-process phosphoric acid production system, and the coupling device comprises a spiral mixing reactor (1), a mixing reactor (2) and a fluorine-containing gas washing and recycling device (3) which are sequentially arranged and connected; the production method comprises the following steps: adding concentrated sulfuric acid with the temperature of 80-90 DEG C into the wet-process phosphoric acid defluorination residues and silica fume in a spiral mixing reactor according to the mass ratio of 100: (5-10), reacting for 40-60 minutes, controlling the reaction temperature to be 90-100 DEG C, returning slurry B to a wet-process phosphoric acid production pre-extraction system, and separating and purifying the slurry B to obtain the wet-process phosphoric acid defluorination residues. Fluorine-containing gases SiF and HF generated by the mixing reaction are sent to a fluorine-containing gas washing and recycling device through a waste gas main pipe to be washed to obtain a 8-15% fluosilicic acid solution. The coupling device is coupled with an existing wet-process phosphoric acid production system, a large number of newly-added equipment and procedures are reduced, the whole process is free of three-waste emission, the method is simple in process, the fluorine recovery rate is larger than or equal to 83%, meanwhile, phosphorus is efficiently recovered, and pollution of fluorine resources to the environment is reduced.
Owner:KUNMING CHUAN JINNUO CHEM IND

Preparation method of magnesium fluosilicate for concrete hardening agent

The invention relates to the technical field of magnesium fluosilicate production, in particular to a preparation method of magnesium fluosilicate for a concrete hardener, which comprises the following steps: adding a magnesium-containing compound into a fluosilicic acid solution to obtain a mixed solution; when it is judged that the preparation of the mixed solution does not meet the preset standard according to the turbidity gradient of the mixed solution, the preset adding rate is reduced; adding an impurity removal agent into the mixed solution meeting the preset standard, stirring, standing, precipitating and filtering to obtain magnesium fluosilicate filtrate; concentrating the magnesium fluosilicate filtrate until crystals are separated out to obtain magnesium fluosilicate crystal slurry; judging whether the preparation of the magnesium fluosilicate crystal slurry meets a preset standard or not according to the gray value variance; and carrying out centrifugal separation on the magnesium fluosilicate crystal slurry meeting the preset standard to obtain wet magnesium fluosilicate crystals, and drying the wet magnesium fluosilicate crystals to obtain a magnesium fluosilicate product. The preparation efficiency of the magnesium fluosilicate is improved.
Owner:YUNNAN NINGFU ENVIRONMENTAL PROTECTION TECH CO LTD

Homogeneous reactor and application thereof

The invention discloses a homogeneous reactor and application thereof, and belongs to the technical field of reactors. Comprising a stirring tank and a stirrer, wherein the stirrer comprises a stirring shaft coaxially arranged in the stirring tank, a motor for driving the stirring shaft and stirring blades on the stirring shaft; the lower part of the stirring tank is provided with a feed port, the top of the stirring tank is provided with an exhaust port, the lower part is a straight cylinder section, and the upper part is an expansion part; a lower guide cylinder is coaxially arranged at the lower part in the straight cylinder section, an upper guide cylinder is coaxially arranged at the upper part in the straight cylinder section, a plurality of spoilers are uniformly distributed on the inner wall of the top of the straight cylinder section, and a discharge hole is formed in the side wall of the top of the straight cylinder section; an upper plug flow blade, a lower plug flow blade and a floating foam scattering blade are sequentially arranged on the stirring shaft from bottom to top; the upper flow pushing blade is positioned at the lower part in the lower guide cylinder and is used for pushing liquid upwards; the lower flow pushing blade is positioned at the upper part in the upper guide cylinder and is used for pushing liquid downwards; the floating foam scattering blade is located in the expansion part, located above the liquid level in the stirring tank and used for scattering floating foam on the liquid level.
Owner:HUBEI XIANGYUN GROUP CHEM

A device for preparing potassium fluosilicate using mixed acid

The application discloses a device for preparing potassium fluosilicate by using mixed acid and belongs to the technical field of potassium fluosilicate preparation, which comprises a fixing frame, the inner side of the fixing frame is provided with a reaction kettle shell, and the inside of the reaction kettle shell is provided with a stirring device; the top of the stirring device is fixedly connected with a gear one, the top sides of the reaction kettle shell are movably connected with a rotating shaft one, the top of the rotating shaft one is fixedly connected with a gear two, the bottom of the rotating shaft one is fixedly connected with a reciprocating screw rod, the outer side of the reciprocating screw rod is movably connected with a sliding plate, the inner side of the reaction kettle shell is fixedly connected with a sliding rod, the outer side of the sliding rod is movably connected with a sliding plate, the outer side surface of the sliding plate is provided with a groove, the inside of the groove is movably connected with a rotating shaft two, the outer side of the rotating shaft two is fixedly connected with a disturbance plate, and the bottom of the disturbance plate is fixedly connected with a flow guide fin. The application is used to solve the problem that the silicon powder is mixed with the mixed acid solution slowly in the early stage of reaction, thereby reducing the overall production efficiency.
Owner:HENGYANG DONGFU NEW MATERIAL CO LTD

Fluorosilicic acid concentration system for producing anhydrous hydrogen fluoride

The utility model relates to the technical field of preparation of anhydrous hydrogen fluoride from fluosilicic acid, in particular to a fluosilicic acid concentration system for anhydrous hydrogen fluoride production, which comprises a fluorine-containing waste gas scrubber group, a dilute fluosilicic acid feeding tank, a fluosilicic acid concentrator group and a silicon dioxide separation tank which are connected in sequence, and a liquid phase outlet at the bottom of the silicon dioxide separation tank is also connected with a fluosilicic acid concentrator through a concentration circulating pump. The system disclosed by the utility model is simple, low in investment and operation cost, high in absorption rate of SiF4 gas, energy-saving and consumption-reducing.
Owner:WUHUAN ENG

Pure sandy sodium fluosilicate as well as preparation method and application thereof

The invention relates to the technical field of chemical product preparation, in particular to pure sandy sodium fluosilicate as well as a preparation method and application thereof. The preparation method of the pure sandy sodium fluosilicate comprises the following steps: S1, adding industrial sodium sulfate into hot water, dissolving, filtering to obtain a sodium sulfate solution, slowly adding the sodium sulfate solution into a fluosilicic acid solution according to a molar ratio of the fluosilicic acid solution to the sodium sulfate solution of 1: 1, stirring, centrifuging, and filtering to obtain a sodium fluosilicate filter cake; s2, dissolving the sodium fluosilicate filter cake in pure water according to a ratio of 1: 30 to obtain a colorless and transparent sodium fluosilicate saturated solution; s3, mixing the crushed ice blocks frozen by the pure water with cold pure water at 0-5 DEG C to obtain an ice-water mixture; preparing a sandy sodium fluosilicate seed crystal; s4, adding an ice-water mixture into the sodium fluosilicate saturated solution; meanwhile, adding sandy sodium fluosilicate seed crystals; s5, sodium fluosilicate crystals are separated out, the sodium fluosilicate crystals are centrifuged and dried, and a sand-like sodium fluosilicate finished product is obtained.
Owner:ANHUI JINYANG FLUORINE CHEM

Solid electrolyte, method for producing solid electrolyte, and battery

The solid electrolyte contains Na, M [alpha], M [beta], and F, where M [alpha] is at least one element that is a trivalent cation, and M [beta] is at least one element that is a tetravalent or higher cation. As a result, it is possible to provide a solid electrolyte having high ion conductivity. Preferably, M [beta] is an element having a tetravalent cation, the solid electrolyte contains a component represented by the compositional formula Na3-xM [alpha] 1-xM [beta] xF6, and 0 < x < 1 is satisfied.
Owner:NGK INSULATORS LTD +1

Sulfide solid electrolyte and method for producing same, electrode mixture, solid electrolyte layer, and all-solid-state lithium ion secondary battery

A sulfide solid electrolyte includes: a Li element; a P element; a S element; and a Ha element. The sulfide solid electrolyte has an argyrodite crystal structure. The crystal structure includes a plurality of PS4 tetrahedrons where the P element may be substituted and at least a part of the S elements may be substituted. The crystal structure includes 16 elements serving as the vertices of the PS4 tetrahedrons T1 in a unit cell. When the 16 elements are made to correspond to 16 S elements constituting vertices corresponding to 16e sites of PS4 tetrahedrons T2 in a space group F-43m, an average value of a distance Δ between respective positions of the 16 elements in the PS4 tetrahedrons T1 and respective positions of the 16 S elements in the PS4 tetrahedrons T2 corresponding thereto is 0.05 Å to 0.30 Å.
Owner:AGC INC

Method for producing inorganic fluoride luminescent material

Provided is a method for producing an inorganic fluoride luminescent material having exceptional luminescence characteristics by using a non-aqueous hydrogen-fluoride-containing liquid. A method for producing an inorganic fluoride luminescent material, the method including bringing a first inorganic fluoride luminescent material and a non-aqueous hydrogen-fluoride-containing liquid that has a hydrogen fluoride content in the range of 20-100 mass% (inclusive) into contact with each other to obtain a non-aqueous solution containing ions derived from the first inorganic fluoride luminescent material, and bringing the non-aqueous solution and a non-aqueous organic liquid that has a hydrogen fluoride content of less than 20 mass% into contact with each other to precipitate a second inorganic fluoride luminescent material. 
Owner:NICHIA CORP

Quartz sand pickling waste liquid resourceful treatment method

The invention provides a quartz sand pickling waste liquid resourceful treatment method, which belongs to the field of industrial wastewater treatment, and comprises the following steps: adding a magnetic composite seed crystal into quartz sand pickling waste liquid, stirring, and carrying out magnetic separation; adding soluble potassium salt into the treated waste liquid to recover potassium fluosilicate; carrying out diffusion dialysis treatment on the filtrate to obtain recycled acid and dialysis residual liquid; the diffusion dialysis treatment adopts an asymmetric membrane, one surface of the asymmetric membrane is of a compact structure, the other surface of the asymmetric membrane is of a physical gradient of a loose structure, and one side of the compact structure of the asymmetric membrane is in contact with the waste liquid; and adding calcium oxide or calcium hydroxide into the dialysis raffinate for deep treatment and calcium recovery. The resource treatment method for the quartz sand pickling waste liquid is low in treatment cost, high in resource recovery rate and environmentally friendly, and quality-divided resource recovery of the quartz sand pickling waste liquid is achieved.
Owner:SHAANXI HIGH TECH ENVIRONMENTAL PROTECTION TECH CO LTD

Recovery method of solid-state battery material

The invention discloses a solid-state battery material recovery method, and relates to the technical field of solid-state battery recovery, and the method comprises the following steps: heating first mixed powder in air to obtain second mixed powder; the second mixed powder is leached through organic weak acid and a reducing agent, first leaching residues and first leaching liquid are obtained, and then the first leaching liquid is processed through a wet process; the first leaching residues are leached with sulfuric acid, and second leaching residues and second leaching liquid are obtained; precipitating lanthanum oxalate from the second leaching solution to obtain a first mixed solution; precipitating lithium carbonate from the first mixed solution; the second leaching residues are leached with hydrofluoric acid, and third leaching liquid and carbon are obtained; precipitating zirconium oxalate from the third leaching solution to obtain a second mixed solution, and concentrating the second mixed solution to obtain fluosilicic acid. Through heating, step-by-step leaching, a wet process, precipitation separation and the like, valuable metals, silicon and carbon are efficiently separated and recycled, copper and aluminum impurities are removed, the resource utilization rate is effectively increased, and the feasibility of industrialization is remarkably improved.
Owner:SHENZHEN JIECHENG NICKEL COBALT NEW ENERGY TECH CO LTD

Phosphor material for light sources and method of manufacturing the same

This application relates to phosphor materials for light sources and methods for manufacturing the same. One method includes: mixing a first fluoride phosphor powder doped with tetravalent manganese with a processing solution for a specified time period; stopping the mixing to allow the fluoride phosphor powder to settle; removing at least some liquid that has separated from the first fluoride phosphor powder; repeating the steps of (a) mixing, (b) stopping the mixing, and (c) removing at least some of the liquid during one or more additional cycles; and obtaining a second fluoride phosphor powder after repeating the steps of mixing, stopping the mixing, and removing at least some of the liquid. The second fluoride phosphor powder contains a reduced amount of manganese compared to the first fluoride phosphor powder.
Owner:GENERAL ELECTRIC CO

A method for reducing pollution and saving water in a photovoltaic industrial park sewage treatment and recycling

The present application relates to sewage treatment and water resource recycling technical field, especially to a kind of photovoltaic industrial park sewage treatment and recycling integrated pollution reduction water-saving method, including first pollution reduction water-saving strategy, pull rod slice production wastewater internal circulation, photovoltaic cell piece production wastewater internal circulation;Second pollution reduction water-saving strategy, after tail water treatment of park sewage treatment plant, as recycled water is provided to enterprise, for the production, life link of non pure water demand;After tail water treatment of sewage treatment plant, as recycled water is provided to enterprise, for pure water production;Third pollution reduction water-saving strategy, enterprise fluorine-containing wastewater, fluorine-free wastewater is treated by quality, and quality is transported to sewage treatment plant, so that sewage treatment plant reduces fluorine-containing wastewater treatment cost, while increasing fluorine-free recycled water volume, reduce the influence of photovoltaic industrial wastewater on water ecological environment.
Owner:CHINESE ACAD OF ENVIRONMENTAL PLANNING

Automatic method for producing fluorine-containing crystalline product from hydrofluoric acid solution

Provided is an automatic method for producing a fluorine-containing crystalline product from a hydrofluoric acid solution, comprising: sensing the concentration of the hydrofluoric acid solution, and presetting a feeding flow rate; outputting a predetermined flow rate of the reaction solution by an automatic control module based on the concentration and the flow rate of the hydrofluoric acid solution and the concentration of the reaction solution; feeding the reaction solution and the hydrofluoric acid solution into the reaction area; sensing the in-situ fluoride ion concentration of the solution in the reaction area in real time, and controlling the feeding flow rate of the reaction solution in real time by the automatic control module; sensing the precipitation height of the fluorine-containing crystals in real time, and controlling whether to discharge the fluorine-containing crystals by the automatic control module. The method can be used to easily treat the hydrofluoric acid solution with a high concentration, accordingly obtaining sodium fluoroaluminate crystalline products or sodium fluorosilicate crystalline products with sand-like shape, low moisture content, and high sodium-to-aluminum ratio.
Owner:LI MING CHENG

Red phosphor, method for producing the same, and use

This application discloses a red phosphor, a method for manufacturing the same, and its use, and relates to the technical field of luminescent materials. The chemical composition of the red phosphor is A2M (1-x) F6:xMn 4+ (where A is at least one selected from alkali metal elements, M is at least one selected from Group 4 elements or Ti element, and the value range of x satisfies 0 < x ≦ 0.05). The red phosphor is in a particulate form, and the concentration of tetravalent manganese ions gradually decreases in the radial direction from the center of the red phosphor particles to its surface. In this application, due to the concentration of the activator Mn 4+ distributing in a descending gradient in the radial direction from the center of the red phosphor particles to its surface, the erosion of the phosphor powder by water vapor is buffered, its anti-aging property is improved, and the service life is further extended.
Owner:JIANGSU BREE OPTRONICS CO LTD +1

Lithium leaching control process based on microwave radiation enhancement

The invention belongs to the technical field of flue gas recovery, and provides a microwave radiation-based enhanced lithium leaching control process which comprises the following steps: predicting the concentrations of fluorides and sulfides by using a moving average method to avoid that the concentration of the fluorides exceeds the standard due to reaction lag, and determining the concentration of the fluorides by periodically analyzing the change trend of concentration data and setting a moving window. Different change stages of fluoride or sulfide concentration can be more accurately captured, the accuracy of prediction analysis is improved, the adjustment amount of spray liquid of the corresponding adjustment layer of the three-stage cross-flow spray tower is calculated by using a PID algorithm, the adjustment amount of spray liquid of other fine adjustment layers is calculated through a fluid mechanics model, and the requirements of fluorine and sulfur separation and recovery are met while the cost is reduced. According to the method, gas-liquid separation balance is kept, safe and stable operation of flue gas recovery is achieved, influence analysis of gas drag force is added, whether correction is conducted or not during spraying liquid flow adjustment is selected, and therefore flue gas recovery is achieved by improving the accuracy of spraying liquid flow adjustment and high quality.
Owner:HUNAN DAZHONGHE LITHIUM MINE CO LTD

Vertical graphene skeleton confinement silicon fluoride-based composite material as well as preparation method and application thereof

The invention discloses a vertical graphene skeleton confinement silicon fluoride-based composite material as well as a preparation method and application thereof, and belongs to the field of inorganic materials. Putting Si into a tubular furnace, and heating to 1000-1200 DEG C at the speed of 10 DEG C / min in an argon environment; converting the atmosphere into a hydrogen / methane mixture for reaction to generate Si (at) G; then mixing and grinding the Si (at) G and tetrafluoroterephthalic acid, transferring the mixture to a tubular furnace, and finally performing heat treatment in an argon atmosphere to obtain a Si (at) G-F composite material; the composite material is of a core-shell type compact structure, and the surfaces of silicon particles are coated with vertically growing graphene sheets (VGs) in a self-adaptive mode to form a tightly-crosslinked three-dimensional network; dispersed sphere-like particles are formed, and the surfaces of the particles are tightly coated with the corrugated graphene sheet layers; the vertical graphene framework confinement silicon fluoride-based composite material Si (at) G-F composite material disclosed by the invention shows excellent electrochemical performance, and a feasible new way is provided for the development of high-energy-density lithium ion batteries.
Owner:ANYANG INST OF TECH

Method for recovering nitric acid containing hydrofluoric acid

PendingCN120440852ASilicon halogen compoundsCalcium/strontium/barium nitratesCalcium hydroxideProcess engineering
The invention provides a hydrofluoric acid-containing nitric acid recovery method. The method comprises the following steps: preheating a hydrofluoric acid-containing nitric acid waste liquid to 50-80 DEG C, feeding the hydrofluoric acid-containing nitric acid waste liquid into a reaction bed from the bottom of the reaction bed, and carrying out a reaction on glass fragments; sending the settled acid liquor into a calcification kettle, adding calcium hydroxide slurry accounting for 1-3% of the total acid amount, and completely reacting a small amount of hydrofluoric acid in the acid liquor; carrying out layering separation on the reacted material in the calcification kettle; upper-layer acid liquor enters a rectifying tower to be subjected to reduced-pressure rectifying operation, nitric acid refining is completed, and a concentrated nitric acid finished product with the nitric acid content larger than 70% is obtained; and drying the lower-layer slurry, adding water for dissolving, crystallizing, separating, and finally drying to obtain pure calcium fluosilicate and calcium fluoride finished products. And adding water for dissolving, crystallizing, separating and drying for 2-3 times to obtain a finished product with the purity of more than 99%. The method has the advantages of simple reaction process, few treatment steps, reduction of energy consumption and medicament consumption, reduction of the treatment cost, improvement of the recovery rate, reduction of secondary pollution and realization of resource recovery.
Owner:FUJIAN YU RONG TECH CO LTD

Multifunctional silanes and electrolyte compositions containing them

Multi-functional compounds of the structure: electrolyte compositions containing them, and electrochemical devices that utilize the electrolyte compositions.
Owner:ORBIA FLUOR & ENERGY MATERIALS USA INC

Integral pollution-reducing and water-saving method for sewage treatment and recycling in photovoltaic industrial park

The invention relates to the technical field of sewage treatment and water resource recycling, in particular to an integral sewage-reducing and water-saving method for sewage treatment and recycling in a photovoltaic industrial park, which comprises a primary sewage-reducing and water-saving strategy, internal circulation of pull rod slicing production wastewater and internal circulation of photovoltaic cell production wastewater. According to the second-stage pollution-reducing and water-saving strategy, after tail water of a sewage treatment plant in the park is treated, the tail water serves as recycled water to be provided for enterprises and used for production and living links with non-pure water requirements; after being treated, the tail water of the sewage treatment plant is supplied to enterprises as reclaimed water for pure water production; according to the three-stage pollution-reducing and water-saving strategy, fluorine-containing wastewater and fluorine-free wastewater of enterprises are treated according to quality and conveyed to a sewage treatment plant according to quality, so that the fluorine-containing wastewater treatment cost of the sewage treatment plant is reduced, the fluorine-free regenerated water amount is increased, and the influence of photovoltaic industrial wastewater on the water ecological environment is reduced.
Owner:CHINESE ACAD OF ENVIRONMENTAL PLANNING

Porous silicon composite, porous silicon carbon composite containing the same, and anode active material

One embodiment of the present invention relates to a porous silicon composite, a porous silicon carbon composite containing the same, and an anode active material, in which the porous silicon composite and the porous silicon carbon composite each contain both silicon particles and a magnesium compound, and have a molar ratio (O / Si) of oxygen (O) atoms to silicon (Si) atoms that satisfies a specific range, and by applying the porous silicon composite and the porous silicon carbon composite to the anode active material, it is possible to realize an excellent capacity retention rate, and to significantly improve the discharge capacity and initial efficiency.
Owner:DAEJOO ELECTRONICS MATERIALS CO LTD

Method for improving the yield of fluosilicic acid using wet-process phosphoric acid concentration circulating water

This invention discloses a method for using circulating water from a wet-process phosphoric acid concentration system to improve the yield of fluorosilicic acid. The method includes the following steps: First, circulating water from a 58% ω(P₂O₅) concentrated phosphoric acid production system is pumped into a cooling system; the cooled circulating water is then pumped into the first and second fluorine absorption tanks of a 48% ω(P₂O₅) concentrated phosphoric acid production system. Second, the circulating water from the 48% ω(P₂O₅) concentrated phosphoric acid production system is used as makeup water for the 58% ω(P₂O₅) concentrated phosphoric acid production system. Finally, process water is pumped into the 48% ω(P₂O₅) concentrated phosphoric acid production system to replenish the water level. The method provided by this invention can effectively recover fluorine resources from the circulating water in the concentration system, improve the yield of fluorosilicic acid, reduce silica gel deposition in the 48% ω(P₂O₅) concentrated phosphoric acid production system, reduce cleaning workload, and continuously refresh the circulating water to reduce the corrosion rate of equipment and pipelines by HF. Furthermore, it can reduce the amount of circulating water discharged and the amount of calcium hydroxide used.
Owner:GUIYANG KAILIN FERTILIZER CO LTD

Raw material mixing equipment for preparing potassium fluosilicate

The invention discloses raw material mixing equipment for potassium fluosilicate preparation, and belongs to the technical field of potassium fluosilicate preparation, the raw material mixing equipment comprises a hollow base, a supporting frame is arranged at the top of the hollow base, a mixing barrel is arranged at the top of the supporting frame, a sealing cover plate is arranged at the top of the mixing barrel, and a first rotating shaft is arranged in the sealing cover plate; a first belt round head is fixedly connected to the outer side of the first rotating shaft, a second rotating shaft is movably connected to the interior of the sealing cover plate, a second belt round head is fixedly connected to the outer side of the second rotating shaft, a first bevel gear is fixedly connected to the bottom of the second rotating shaft, a sliding rail is fixedly connected to the surface of the bottom of the sealing cover plate, and a sliding rod is slidably connected to the interior of the sliding rail. An annular rack is fixedly connected to the bottom of the sliding rod, a first fixing plate is fixedly connected to the bottom of the annular rack, and a flow guide plate is fixedly connected to the bottom of the first fixing plate. The equipment is used for solving the problem that when the equipment mixes raw materials, the mixing efficiency of the surrounding raw materials is low, and conglomeration and wall adhesion phenomena are generated.
Owner:HENGYANG DONGFU NEW MATERIAL CO LTD